Science

Global Epidemics Not Likely

Climate change has been implicated in a variety of catastrophic scenarios, most of which are purely speculative. One such case is the apocalyptic warnings of global plague sounded by Harvard Physician Paul Epstein among others. Epstein and others have predicted that malaria, yellow and dengue fever, cholera epidemics and heat stroke could increase as a result of rising temperatures.

These dire predictions have received a lot of publicity. However, as Science (November 7, 1997) points out in a recent article, there is very little evidence to support these contentions. “What I find astounding,” University of Michigan epidemiologist Mark L. Wilson told Science, “is how little research is actually being done in this whole thing.”

Duane Gubler, director of the division of vector-borne infectious diseases at the Centers for Disease Control and Prevention dismisses the claims as “probably the most blatant disregard for other factors that influence disease transmission.”

He notes, for example, that the dengue pandemic that afflicted Mexico in 1995 leading to more than 2,000 confirmed cases only caused 7 confirmed cases in Texas just across the Rio Grande. He also notes that the Gulf states are several degrees warmer than the Caribbean during the summer yet the Caribbean has the disease and the Gulf states don’t. “If temperature was the main factor, we would see epidemics in the Southern U.S. We have the mosquito; we have higher temperatures and constant introduction of viruses, which means we should have epidemics, but we don’t,” he says.

Gubler and others argue that public health measures are far more important in disease patterns. According to Gubler, “The most cost effective way to mitigate the effect of climate change on infectious disease is to rebuild our public health infrastructure and implement better disease-prevention strategies.”

Wealthy countries are nearly immune to the vector-borne infectious diseases which afflict much of the third world. This is due better housing, better sanitation, piped water systems, and many other factors that come with greater wealth. Destroying wealth by signing an ill-advised climate treaty may well cause prophecies of global plague to be self-fulfilling.

Health Affects of Climate Change

The American Council on Science and Health has just released a study on the possible health effects and policy implications of climate change. The report, Global Climate Change and Human Health, evaluates the various health scenarios that have been suggested as possible outcomes of increased global warming. These scenarios are evaluated assuming a 1 to 3.5 degrees C increase in global temperatures by the year 2100 as has been predicted by the Intergovernmental Panel on Climate Change.

The researchers concluded, for example, that heat-related deaths are not likely to increase significantly as a result of climate change since most warming would occur in winter and at high latitudes. The agricultural affects of climate change are likely to be positive according to the report. Elevated concentrations of CO2 will increase plant growth and the northern latitudes would benefit from higher temperatures. Other regions are likely to be only slightly affected by global warming. Regardless, undernourishment is and will continue to be a major health problem. But it is caused by “poverty-related maldistribution of food,” not underproduction.

The report concludes that measures to stabilize atmospheric concentrations of greenhouse gases would be costly and ineffective. The researchers argue that, “The optimal approach to dealing with the prospect of adverse climate change-related health effects would be largely adaptational: its primary goal would be to suit economies, healthcare systems, and living conditions to lasting – i.e., existing foreseeable – challenges to human health.” The study can be found on the web at www.acsh.org.

Immediate Health Effects from Climate Change

A new study published in Lancet (November 8, 1997) has predicted that 700,000 avoidable deaths will occur every year worldwide by 2020 from exposure to particulates from fossil fuel combustion. Thirty-three thousand of these deaths are expected to occur in the U.S. alone. The authors argue that if climate change policies are implemented early these deaths can be avoided.

The results, however, are based on the controversial findings of a study funded by the Environmental Protection Agency. The study by C. Arden Pope III of Brigham Young University found that air-born particulate matter is associated with a 17 percent increase in mortality. The study of more than 550,000 people did not, however, measure how much pollution the study subjects were exposed to, nor did it adequately consider other confounding factors such as behavioral, occupational, environmental and genetic influences. Moreover, any statistical association less than 100 percent is considered to be weak and difficult to interpret (Wall Street Journal, January 7, 1997).

Finally, with regards to the Lancet study, Pope himself is cautious. After interviewing Dr. Pope, Science News reports that: “[Pope] who has conducted many of the particulates and health studies upon which the Lancet analysis is based, hopes that people will not place too much weight on its estimates of lives that can be saved by climate policies. Those numbers are still preliminary and rest on substantial uncertainties” (Science News, November 8, 1997). Also see www.junkscience.com for further information.

CO2 and Plant Growth

In a paper presented at a Fraser Institute Conference, Sherwood Idso of the U.S. Water Conservation Laboratory in Phoenix, Arizona surveys the scientific literature on the Biological Consequences of Atmospheric CO2 Enrichment. Hundreds of experiments have verified that atmospheric CO2 enrichment boosts plant productivity in a variety of environmental conditions, including low light levels, inadequate water, and insufficient soil nutrients. In each case CO2 enrichment helped plants to “overcome growth restrictions resulting from resource limitations.”

One reason for this result is that plants grown with high levels CO2 have more extensive root systems and are, therefore, able to “more thoroughly explore larger volumes of soil in search of the things they need.” Other factors are greater efficiency in nitrogen use, increased activity of beneficial soil microorganisms, and most importantly direct stimulation of nitrogen-fixing bacteria. Increased “vegetative productivity from CO2 enrichment stimulates bacterial nodule growth and activity” which in turn “produce several-fold increases in nitrogen fixation.”

Other adverse environmental conditions which are overcome by CO2 enrichment are soil salinity, air pollution, and global warming. In the case of global warming it turns out that the benefits of high CO2 concentrations actually rise as temperatures increase. The percentage of growth enhancement rose from nearly zero percent at 10 degrees C to a full 100 percent at 38 degrees C. “The optimum temperature for plant growth generally rises as the air’s CO2 content rises.”

There is a worry that the benefits of CO2 enrichment found in short-term experiments does not apply to the long-term. The longest running CO2 enrichment study has not found this to be a problem, however. The ongoing experiment, which is now 10 years old, involves eight sour orange trees which have been grown from seedlings to maturity. The trees that are CO2-enriched (receiving 75 percent more CO2 than the ambient treated trees) have “produced over twice as much biomass as the trees growing in normal air.” At the last harvest the researchers picked over three times as much fruit from the enriched trees.

The paper can be obtained from The Fraser Institute at (604) 688-0221 or (416) 363-6575.

Where Has All The Warming Gone?

The National Oceanic and Atmospheric Administration has reported that the summer of 1997 was the 37th coolest for the contiguous United States in the last 103 years at an average temperature of 71.5 degrees F. It was also the 24th driest with a national average annual precipitation of 7.68 inches (AMS Newsletter, www.ametsoc.org/AMS/newsltr/newsltr.html, October 1997).

Goodbye Wirth

Undersecretary of state for global affairs Timothy Wirth surprised everyone by announcing that he will take a job with Ted Turner managing his $1 billion United Nations fund. Wirth will be replaced as the administration’s lead negotiator by Stuart Eizenstat. Wirth may still attend the affair as an adviser. Word is the administration is not very happy with the move (Washington Times, November 24, 1997).

Announcements

The American Policy Center has called for a “Strike For Liberty” to send a loud and clear message to the United States Senate against the Climate Change Protocol. The Strike has been called for December 5, 1997. For further information see www.americanpolicy.org/.

The Competitive Enterprise Institute has produced a book and a highlights video based on The Costs of Kyoto conference held in July 1997. Both the book and the video are available for $15 or buy both for $25. To order call CEI at (202)331-1010, or e-mail to info@cei.org.

Growing or Shrinking? Nobody Knows

Environmentalists have repeatedly claimed that global warming is causing the earth’s polar ice caps to melt which could cause widespread coastal flooding. As it turns out the greenies have been speculating in a data-free environment.

The Canadian Space Agency and the National Aeronautics and Space Administration have just completed the data-gathering necessary to construct the first high-resolution map of the Antarctic continent. Previous maps have failed to provide a complete picture of the continent meaning that scientists are not sure whether the massive ice sheet is growing larger or smaller. While the data collection took only four weeks it will be another year before the 8,000 images can be meshed into a complete map of the Antarctic (Canada NewsWire, October 24, 1997).

Better Models, Opposite Results

Scientists have been predicting that global warming would lead to warmer and drier weather for Illinois and Missouri hurting farmers and others who depend on good weather. Now climatologists Derek Winstanley and Stanley Changnon of the Illinois State Water Survey are saying that the weather could be wetter and cooler.

The reversal comes as computer models that attempt to replicate the earth’s climate improve. “The science is still evolving,” Changnon said. “The models are far from perfect.” The inclusion of aerosols, which cool the planet, into the models is one of the reasons why the models now predict cooling for the Midwest, though the affects of aerosols is still hotly debated.

The new predictions are more in line with what has been happening in the Midwest over the past century where average temperatures have cooled and precipitation has risen. Previous predictions had temperatures in the area rising from 6 to 12 degrees Fahrenheit and major rivers bottoming out. Now researchers are predicting a cooling of 2 to 3 degrees which would not cause problems, Changnon said. He further stated that it will be another ten years before “complete and accurate” models are available. “A whole new outcome is still very possible” (St. Louis Post-Dispatch, October 26, 1997).

A Greener Africa

Climatologists have wondered why North Africa changed from a wet, lush grassland to a barren desert over the last 6,000 years. A study published in Science (October 17, 1997) by researchers John Kutzback and Zhengyu Liu may have solved the mystery.

The researchers believe that the climate change was caused by a combination of shifts in the Earth’s orbit, a decrease in vegetation, and a slight cooling of the Atlantic ocean. Using a computer generated climate model the researchers found that an increase in sea surface temperature would cause deeper penetration of moisture-laden air into North Africa as well as enhance the summer monsoon precipitation by as much as 25 percent.

Solar Cycles and Climate Change

Researcher Richard C. Willson has published an article in Science (September 26, 1997) which shows the sun to be a major component of climate change. Using observations from three satellite-borne sensors which have monitored sun brightness since 1978 Willson found a brightening of 0.036 percent per decade from 1986 to 1996. If this were sustained for 100 years it might produce a warming of about 0.4 degrees C.

As pointed out in a news article on Willson’s findings, appearing in the same issue of Science, the findings are controversial. Some studies have comfirmed Willson’s findings while others find no brightening. Claus Frohlich, who has not found any brightening in his research says, “I’m not saying one or the other is correct; we’re just doing things differently.” Frohlich believes that in order to settle the controversy it will be necessary to have reliable measurements that span two solar minima (a complete solar cycle). “But,” the article concludes, “that means researchers will have to wait at least another decade before deciphering the sun’s role in global change.”

Announcements

The Competitive Enterprise Institute has produced a book and a highlights video based on The Costs of Kyoto conference held in July 1997. Both the book and the video are available for $15 or buy both for $25. To order call CEI at (202)331-1010.

The Competitive Enterprise Institute has just published Mitigation of Climate Change: A Scientific Appraisal, in which S. Fred Singer of the Science and Environmental Policy Project discusses alternative strategies to mitigate climate change. To order the report call CEI at (202)331-1010.

In a letter to Nature (March 13, 1997) James W. Hurrell and Kevin E. Trenberth questioned the reliability of the satellite temperature data which show a slight cooling trend over the last 20 years. They argue that the data contain significant discontinuities due to various factors, the most important being the replacement of worn out satellites. The main contention in the Hurrell/Trenberth paper is that there are two “spurious” downward jumps in the satellite record due to changes in satellites and that the real temperature trend is slightly positive.

There are some serious errors with the method used by Hurrell and Trenberth, however. Drs. John R. Christy, Roy W. Spencer, and William D. Braswell, who track and publish the satellite temperature data, point out those errors in correspondence to Nature (September 25, 1997).

There are two methods to directly measure the temperature of the lower troposphere (surface to 7 km). One is balloon-borne instruments known as radiosondes which rise through the atmosphere. The other are microwave sounding units (MSUs) mounted on satellites which measure the intensities of microwave emissions from atmospheric oxygen which are proportional to temperature.

There is strong agreement between the two records even over the periods where Hurrell and Trenberth claim that the spurious jumps take place. Another data set is also available from the NOAA-06 and NOAA-07 satellites which were measuring temperatures at the time of the breaks that Hurrell and Trenberth claim to have discovered. These also agree with the MSU data.

Hurrell and Trenberth ignore the balloon data and estimate atmospheric temperatures using sea-surface temperatures (SSTs). There are a couple of problems with this method, however. First, the regions where Hurrell and Trenberth find the greatest disagreement is in the Pacific and Indian Oceans where ship data are scattered. Buoy data have also been available since the early-1980s. But, as Christy points out in correspondence with The Cooler Heads Newsletter, “the SST dataset is not homogeneous for these critical regions. Ships and buoys do not measure the water temperature to the agreement necessary for the types of variations we look at for climate change over a decade or so.”

Second, Hurrell and Trenberth derive atmospheric temperatures from the SSTs using general circulation models (GCMs). Christy argues that “There is considerable evidence that SSTs and the atmospheric temperature do not behave in the rigid fashion believed by Hurrell and Trenberth and represented by their simple [linear] regression model. Several studies show that for long periods of (months to years) there are differences between SSTs and air temperatures due to the natural variability of the vertical structure of the atmosphere.”

Once again advocates of the global warming hypothesis use imperfect models to attack actual observed data, standing the scientific method on its head. In the past, when data contradicted the models, the models were rejected. With highly politicized global warming science, however, empirical evidence that contradicts the politically predetermined outcome is either ignored or explained away as anomalous.

What Do Scientists Say?

A survey of state climatologists by Citizens for a Sound Economy found that there is little support for the global warming hypothesis. When asked if they agreed with the statement by President Clinton, “The overwhelming balance of evidence and scientific opinion is that it is no longer a theory but now a fact, that global warming is for real. There is ample evidence that human activities are already disrupting the global climate.” 36 percent agreed, while 58 percent disagreed.

Asked whether “recent global warming is largely a natural phenomenon,” 44 percent said yes while 17 percent said no. Nine out of ten surveyed agreed that “scientific evidence indicates variations in global temperature are likely to be naturally-occurring and cyclical over very long periods of time.” Eighty-nine percent of the climatologists agreed that “current science is unable to isolate and measure variations in global temperatures caused only by man-made factors,” and 61 percent said that the historical data do not indicate “that fluctuations in global temperatures are attributable to human influences such as burning fossil fuels.”

Sixty percent of the respondents said that reducing man-made CO2 emissions by 15 percent below 1990 levels would not prevent global temperatures from rising, and 86 percent said that reducing emissions to 1990 levels would not prevent rising temperatures. Finally, by a 39 to 33 percent margin, more climatologists say that, “evidence exists to suggest that the earth is headed for another glacial period.” The survey can be found at www.cse.org/cse/ and www.globalwarming.org.

What Does the Science Say?

Dr. S. Fred Singer of the Science and Environmental Policy Project has just released a overview of the current state of climate change science and asks whether drastic reductions in greenhouse gases are justified.

The objective of a global climate treaty would be to prevent “dangerous interference with the climate system.” But, according to Singer, there is no scientific evidence that would suggest what level of interference would be dangerous. An article appearing in Science argued that 350-400 ppm is a dangerous level of CO2. However, they base this on an arbitrary “dangerous” temperature increase of 2 degrees C.

Singer also challenges the claim in the 1996 report of the Intergovernmental Panel on Climate Change (IPCC) that it is now possible to discern the human influence among the noise on climate change. First, the “natural” variations are derived from computer models rather than actual observations. Second, the computer models exclude the cooling effects of mineral dust and of smoke and soot from burning biomass and the cloud production effects of sulfate aerosols.

Singer also contends that warmer weather would be beneficial to mankind. Warmer global temperatures, the models predict, would reduce the temperature gap between the northern and southern hemispheres reducing storm intensity at the mid-latitudes. Northern hurricanes, for example, have fallen in both frequency and intensity over the last 50 years. Rainfall has fallen worldwide for the last 40 years. As for rising sea levels Singer argues that they are correlated with falling temperatures.

Singer concludes there is little evidence to justify drastic reductions of greenhouse gases. The best way to avoid the adverse effects of climate change is to adapt. He notes that societies that are economically advanced are the least affected by changes in climate and more readily adapt to changes. Economic development (which will require greater emissions) then is necessary if we are to avoid adverse effects which may arise from climate change. The report is available by contacting SEPP at (703) 352-7535 or by e-mail at singer@sepp.org.

(Washington, DC) — A majority of state climatologists say reducing man-made carbon dioxide emissions to1990 levels or lower would not prevent warmer temperatures on earth, according to a new survey commissioned by Citizens for a Sound Economy (CSE) Foundation. That’s because, according to those surveyed, most climatologists believe global warming “is a largely natural phenomenon.”

“In the debate over global warming, we’ve recently heard from a lot of so-called experts that global warming is for real and that we humans are to blame,” says Paul Beckner, president of CSE Foundation. “While President Clinton and others might think so, those who deal with climate issues day in and day out disagree, and we think it’s important that the American people know that there are in fact climate experts in this country who do disagree with the conventional wisdom on global warming.”

Fifty-eight percent of the state climatologists surveyed said they disagreed with President Clinton’s claim that “the overwhelming balance of evidence and scientific opinion is that it is no longer a theory, but now fact, that global warming is for real” and with the statement that “there is ample evidence that human activities are already disrupting the global climate*” Only 36 percent of the climatologists agreed with Clinton’s assertion.

By a 44 to 17 percent margin, climatologists say that “recent global warming is a largely natural phenomenon,” while nine out of 10 of the climatologists surveyed agreed that “scientific evidence indicates variations in global temperature are likely to be naturally-occurring and cyclical over very long periods of time.”

Six out of 10 of the climatologists disagreed that actions by developed nations to reduce man-made carbon dioxide emissions by 15 percent below 1990 levels will prevent global temperatures from rising. An even higher number, 86 percent, disagreed that reducing emissions to 1990 levels will prevent rising temperatures. Interestingly, by a 39 to 33 percent margin, more state climatologists say that “evidence exists to suggest that the earth is headed for another glacial period.”

Eighty-nine percent of the climatologists said that “current science is unable to isolate and measure variations in global temperatures caused only by man-made factors.” Sixty-one percent of the state climate experts said historical data does not indicate “that fluctuations in global temperatures are attributable to human influences such as burning fossil fuels,” and nearly all said the earth “experienced large global temperature fluctuations with both warming and cooling periods prior to the beginning of the industrial age” and the advent of burning fossil fuels.

Countering claims by theorists that weather patterns have been changing due to global warming, 72 percent of state climatologists say weather events in their states in the past 25 years have not been more severe or frequent. Among the19 percent who said they were, less than a third attributed the changed weather patterns to global warming.

Among other findings in the survey, 72 percent say carbon dioxide emissions will continue to rise, despite efforts to curb man-made sources. Eighty-six percent of the climatologists said that variations in solar output are a likely cause of long-term temperature fluctuations on earth, and an even higher 91percent said variations in the earth’s orbit are a likely cause of temperature fluctuations. The climatologists were unanimous in agreeing that “even if there were no human beings, the earth’s climate would constantly be changing.”

The survey was conducted by American Viewpoint of Alexandria, Virginia from September 23 to October 3, 1997. The results have a margin of error of plus or minus 4.7 percent. Forty-eight states have official climatologists. Of the 48, American Viewpoints was able to contact and survey 36 of them. Ninety-two percent of the climatologists said they did not receive direct funding from state or federal environmental protection agencies, and 86 percent said they did not receive direct funding from business or industry.

CSE Foundation is a 501(c)(3) non-profit, non-partisan research and education organization established in 1984. It accepts no government funding.

[For more information or a complete copy of the survey questions and results, please call Peter Cleary at (202) 942-7608.]

To receive more information on CSE or CSE Foundation, or to comment on our publications, call, write, or E-mail:

Citizens for a Sound Economy
Citizens for a Sound Economy Foundation
1250 H Street, NW, #700, Washington, D.C. 20005-3908
1-888-JOIN-CSE, (202) 783-3870, Fax (202) 783-4687

Reassessment of the IPCC

The report of the Intergovernmental Panel on Climate Change has become the bible for those advocating immediate and heavy reductions in greenhouse gas emissions. An article which originally appeared in the New Zealand Science Review by Dr. Vincent Gray and republished by the Heartland Institute reassesses the claims made in the IPCC report.

One of the problems with the report is its projections of future CO2 emissions. The latest figures from the Carbon Dioxide Information and Analysis Center at Oak Ridge show a 0.026 gigatons of carbon (GtC) per year increase in emissions from 1989 to 1994. Using the IPCC’s estimate of 6.25GtC for 1996 this would suggest that emissions will be about 6.35GtC in the year 2000, yet the IPCC predicts 7.0GtC for that year.

Although the IPCC report lists 69 sets of figures for monthly mean concentrations of atmospheric carbon dioxide from around the world it only uses data from the Mauna Loa and South Pole stations. It states, “Data from the Mauna Loa station are close to, but not the same as, the global mean.” Why then, asks Gray, do they not use the global mean figures. Moreover, the IPCC predicts that atmospheric concentrations of CO2 will rise by 1.8 parts per million (ppm) each year, supposedly based on figures from the 1980s. However, Gray shows that in reality the average annual increase during the 1980s was 1.1ppm per year. From 1990 to 1994 the increase was only 0.08ppm per year. Instead of a doubling of atmospheric CO2 concentrations by the middle of the next century, if the rate of the ’80s persists, it will take 226 years for CO2 concentrations to double.

Gray also points out that the IPCC “isolates the only features of the global temperature record that suggest a possible agreement with greenhouse theory, but ignores those features that cast doubt on the theory.” He lists several of those features. For example, from 1910 to 1945 atmospheric CO2 rose about 3 percent but the world experienced the highest temperature rise this century (about 0.65 degrees C). The years between 1945 to 1978 saw a temperature decrease of 0.2 degrees C while atmospheric CO2 rose by 9 percent.

The article makes it clear that the IPCC took every opportunity to bias the report in favor of a predetermined conclusion. It documents many instances of selective use of data and biased interpretation of the data. At one point Gray states: “According to the IPCC, any climate change, however short, that agrees with greenhouse theory is a long-term trend. Any climate change, however extensive, that does not agree with greenhouse theory is either ignored (like the global drop in temperature between 1940 and 1978); too short to be representative; or an anomaly that has to be explained.”

A Whale of a Study

One of the predicted effects of global warming is retreating ice in the Antarctic. A new study in Science (September 4, 1997) by William de la Mare looks at sea-ice extent in the Antarctica. Estimates from satellite observations, beginning in 1970 have shown no clear trends in sea-ice extent in the Antarctica. However, de la Mare has examined whaling records which were kept for nearly every whale caught along the sea ice edge since 1931. The study shows that there was a decline in the area covered by sea ice of 25 percent from the mid 1950s to the early 1970s. Prior to this, records show that the sea ice was stable from 1931-1954.

An editorial about the article, appearing in the same issue by Eugene Murphy and John King, said, “There is now increasing evidence globally supporting the view that such rapid changes in the Earth’s climate systems can occur naturally, and indeed such changes have probably taken place in the past in the Southern Ocean. This evidence indicates that the variability inferred by de la Mare may be natural and not connected to any human-induced changes. But as yet we do not know.”

The study excluded some of the available data which did not fit the selection criteria. “The data from land stations at South Georgia were excluded, as were catches after the 1956/57 season for species other than minke whales. This resulted in 42,258 records. No records satisfied the selection criteria from 1960 to 1971 inclusive, when sei whaling predominated.”

It is also interesting to note that there was a fall in global temperature of 0.2 degrees C from 1945 to 1978, covering the time period of purported sea ice retreat.

Effects of Smoke Particles on Clouds and Climate

An article in Science shows that smoke aerosol particles generated from burning biomass can increase the cloud reflectance of sunlight. Using satellite data over the Amazon Basin and Cerrado, researchers Yoram J. Kaufman and Robert S. Fraser found that smoke increased cloud reflectance from 0.35 to 0.45, while reducing droplet size form 14 to 9 micrometers. Thus smoke particles appear to have a small cooling effect on the climate (Science, September 12, 1997).

Waffled Speech

In a speech at American University, President Clinton stated that, “We could reduce them [greenhouse gas emissions] 20 percent tomorrow with technology that is already available at no cost if we just changed the way we do things.” Later the White house had to backtrack, admitting that they could not find a single academic source to support the statement.

Elsewhere in the speech Clinton stated that the U.S. should “. . . continue our efforts to expand trade to the rest of the world.” He pointed out that, “We have less than 5 percent of the world’s people in this country; we have about 20 percent of the world’s wealth. We cannot maintain our wealth unless we sell what we have to the other 95 percent of the people in the rest of the world.” That’s odd, as the administration also likes to point out, the U.S. produces 20 percent of the world’s CO2 emissions. Could there be a correlation between emissions, productivity and wealth? If Clinton is serious about expanding America’s wealth and trade he might want to rethink drastic cuts in U.S. CO2 emissions.

Introduction

The UN Conference on Climate Change in Kyoto (Japan) is only a few weeks away and, most of the countries have announced what position they intend to bring into the negotiations. Even the U.S. has finally announced its proposal on the reduction of CO2 emissions, which was revealed in a speech by President Clinton on October 22, 1997 at the National Geographic Society in Washington.

The following discussion, Part I, will outline the positions of several countries on the issue and provide an outlook on the up-coming negotiations in Kyoto, while in Part II (“Tradable Emissions Permits – the Perfect Solution?”) emissions trading systems proposals shall be reviewed.

United States

President Clinton announced in his speech on October 23, 1997, at the National Geographic Society in Washington, that the U.S. will commit itself to reducing CO2 emissions to its 1990 emissions level by the years 2008-2012 and a further reduction in the following 5 years.

The Administration, in addition plans a $5 billion package of spending on R&D and tax incentives, energy-efficiency standards, Federal government energy initiatives and later on a national and an international emissions permit trading system.

The proposal also noted that the U.S. will insist that developing countries be involved in the reduction of greenhouse gases, otherwise, the U.S. threatened it would not sign-on to a treaty. In which form and what part developing countries would have to play in reducing greenhouse gases that would satisfy the Administration was left open.

The earlier prospect of a carbon tax brought so much criticism that the government has now distanced itself from the idea of an “open” carbon tax. The Administration now supports the politically more acceptable solution -a national and an international system of tradable emission permits. The advantages for the Administration are that in a trading system the economic burden is probably smaller and also less visible than in a tax regime. It can even earn some support from well-known economists,(1)  and be portrayed as an innovative, progressive, and market-oriented approach.

The government’s planned increase in spending on R&D will be less controversial since some industries and business will profit from it, while the costs are buried in the national budget and will fall on the taxpayer. The impact of the increased spending on R&D is still disputed, since not everyone agrees with the findings and projections of the Department of Energy Study about the “Potential Impact of Energy Technologies by 2010 and Beyond,”(2) which predicts rather dramatic technological improvements, with the expenses of increased government spending in principal covered by cost savings from less energy use.

The approval of the Senate to a treaty containing legally binding emissions targets depends strongly on the participation of developing countries in the agreement. In its vote (95-0) for the resolution co-sponsored by Senators Robert Byrd (D-W.VA) and Charles Hagel (R-NE) the Senate showed its unwillingness to sign on to restrictions for U.S. industry while developing countries such as South Korea, India, China, and Mexico are not required to participate, especially because these countries, in the near future, will be the biggest emitters of greenhouse gases. The timetable of bringing developing countries into a treaty and the form of their involvement will probably be deciding factor on whether the Senate will approve the treaty.

During the latest meeting in Bonn, Germany which was intended to prepare a draft for a treaty to be signed in Kyoto, the U.S. Administration presented its proposal and tried to win support among other countries. So far, however, there seemed to be disagreement about most key points of such a potential treaty, such as which emissions target, what timetable, who would have to participate, and how countries would be allowed to achieve the emissions target.

European Union

The EU is the biggest advocate for a drastic cut in greenhouse gas emissions and suggests a cut of CO2 emissions by 15% from the 1990 emissions level by 2010. The EU has criticized the U.S. proposal as insufficient and as not going far enough and has questioned the U.S. commitment to prevent global warming. The EU has a number of reasons for taking that position:

First, the political clout of the environmental movements in Europe (especially in Germany, but also in the Netherlands, Scandinavia and increasingly in France) puts European governments under pressure to call for a stringent reduction of emissions. European industry, fearing that Europe would go ahead with such a policy on its own, is concerned about its competitiveness in the global market, and therefore strongly argues for a “leveling of the playing field.” It is especially concerned about giving American and Asian competitors an additional advantage. Some in the industry are even hoping that new demand for “environmental technology” would benefit their advanced technology sector.

The EU is in a unique position because it has signed the treaty as a body (as well as the single member states), which allows it to arrange different targets for its members as long it meets the target for the EU as a whole. EU’s internal goals range from a 40% increase for Portugal to 30% cuts for Luxembourg and 25% for Germany, Austria, and Denmark. The huge reductions in some of the countries are achievable without a dramatic impact on industrial production because of the individual circumstances.

For example, the 1990 level for Germany includes the whole former East German industry, famous for its dependency on coal burning and, consequently, big CO2 emissions. The decision to close many of these unprofitable and inefficient plants makes it easier to achieve big cuts in emissions. Great Britain cut the subsidies for coal mines, which led to a switch from coal to natural gas, and less CO2 emissions. But these decisions were based on economic circumstances, not on concern for possible climate change. This could be seen when Germany’s government backed-off from a decision to cut more coal subsidies after angry mine workers “visited” the German government in Bonn.

The EU-members agreed to introduce a EU-wide carbon tax to reduce CO2 emissions, but despite this decision, the tax has never been implemented. The fear of a negative impact on the European economies loomed too large, especially if Europe would go ahead with such a policy despite the fact that others are not introducing similar measures.

The EU has always been pushing for higher standards but seems more reluctant than the U.S. to embrace market-oriented solutions. The idea of an international tradable permits system is more difficult to sell in Europe, where people are more willing to accept that their governments set standards and industry has to find a way to meet the standards. One has to keep in mind that industries are often closely consulted on the issues to find achievable goals. The cooperation and relations between companies and government are perhaps closer than in the U.S.

Some countries have reservations about emissions trading schemes, but few would go so far as the Dutch environmental minister, Magaretha de Boer: “That’s not something that belongs to our [European] culture.”(3)

Many find it easier to deal with a “simpler solution” – such as government regulations, than with setting up a world-wide trading scheme which needs more organizational preparation (and innovative thinking).The feeling in Europe is that the U.S. first has to do more to cut its emissions of greenhouse gases, since the U.S. is the biggest CO2 emitter in the world in absolute terms. The U.S. is still perceived as an economy which wastes energy in production and especially in its consumption patterns.

During the latest negotiations in Bonn, the EU-countries stuck to their proposal of a 15 percent reduction of greenhouse gases from the 1990 level by the year 2010, they also insist that industrial countries reduce their emissions immediately and under regulatory conditions.

Canada

Canada used to be one of the leading advocates for a treaty on the reduction of greenhouse gases. During the Rio summit in 1992, Canada was one of the mediators that brought the different positions together in a voluntary agreement; but now Canada’s position is not so forthright. The Canadian government is expected to propose an extension of the deadline from the year 2000 to the year 2012 to reduce greenhouse gas emissions to their 1990 levels, to the year 2012, but it will probably ask for a sharper reduction after the year 2012. The reluctance of the Canadian government to commit itself to sharp emissions reductions was heavily criticized by environmental groups as inadequate, while industries and opponents of an agreement think that drastic action could seriously damage the slowly recovering economy. The government has also not yet announced how it expects to achieve the emission targets; it is estimated that Canada’s emissions of CO2 have increased around 11 per cent between 1990 and 1996.(4)

Australia

Other countries argue that the model for differentiated targets should also apply to other countries, not just EU members. For example, Australia argues that there should be individual levels for every country considering its specific situation. The level should be determined by numbers like the projected population growth, GDP per capita, emission intensity of GDP, energy intensity of exports, etc.

Australia is resisting a big reduction in the emissions level, which would have a devastating effect on a country that is a big coal exporter and also relies on coal for domestic energy use. Australia supports the idea of a tradable permit system with some reservations, especially about the initial distribution of permits and the huge transfers of wealth.

Japan

Special focus is directed at Japan. As the host nation it is under pressure to do more than others to insure that there will be some agreement in Kyoto. The Japanese government announced its position a few weeks ago, proposing a 5 percent reduction of carbon dioxide, methane and nitrous oxide emissions below the 1990 emissions level in industrial countries on average in the years 2008-2012. The proposal also allows exemptions and different measurements including GDP, projected development of population number and emissions per capita, which could mean an actual reduction of only 2.5 percent for the US and Japan.

Japan was criticized by the EU and environmentalists for its position, but the government defends its proposal saying the EU’s goal is unrealistic and the government’s proposals would already mean Japan would need 20 new nuclear power plants added to the already existing 52, (increasingly in the news in recent month for scandals involving the non-disclosure of accidents to the public). Internally Japan is divided between the position of the powerful Ministry of Trade and Industry (MITI) which is lobbying for lower emissions cut backs, while the Environmental Agency supports higher reductions of emissions.

Japan depends heavily on oil imports, and to increase the share of other energy sources is extremely difficult, especially for nuclear power after the recent scandals involving serious accidents. And Japan has already achieved a high degree of energy efficiency; therefore, the amount of energy that could be saved through new measures is limited. Japan like most of the other industrial countries, will not be able to stabilize its emissions to its 1990 level until the year 2000; its emissions of CO2 will probably have increased by about 6 percent from the 1990 level by the year 2000.(5)

Developing Countries

Developing countries are a diverse group of countries, from countries like China and India, which might soon became the biggest CO2 emitters, to small African countries with little industrial basis. They therefore hold different opinions on the issue, but they all seem to reject the notion that developed countries dictate them to cut emissions. They rightly argue that most of the emissions in the past came from industrial countries during their industrial development, and developing countries just want to have the same right for economic development for their people. They also insist that the emissions per capita is only a fraction of the emissions by industrial countries.

On the other hand, some industrial countries, in particular the U.S., want developing countries to be included in any agreement they reach, because these countries will increase their emissions drastically in the next decades. Also, industrial countries fear that stricter environmental regulations and increasing costs at home will drive more industries to relocate production to developing countries. This is already happening, but additional costs for CO2 emissions could accelerate this process.

The developing countries strongly oppose the pressure from the industrial countries to accept any restrictions. They fear for their potential for future development, and the words “Ecological Imperialism” are often heard. To expect that countries such as China would be participating in an international permit trading system in the near future seems unrealistic. These countries might be willing to accept foreign investment for cleaner technology for their utility plants and other industry but they probably will not accept any cap on their energy use.

Participation in an international emissions trading system would pose more technical and organizational problems for developing countries than it would for developed countries, such as lack of modern communication, technology to monitor companies, the setting up of markets, and many more.

Another danger may be that if energy prices in these countries would rise, more and more people would be driven away from market products, for example, people who can no longer afford kerosene for cooking will turn to non-market sources such as collecting fire wood. This sometimes leads to even more damage to already fragile ecosystems.

In the latest negotiations the developing countries, represented by the G-77, suggested a reduction of emissions from the industrial countries to 35 percent below 1990 levels by the year 2020; in addition, the developing countries would receive financial compensation from industrial countries if exports from developing countries would be hurt by the climate change policy of the industrial world. In case the industrial countries would not meet the targets they would have to pay penalties to the less-developed countries. In contrast, the developing countries would be under no obligation to reduce their emissions.

Alliance of Small Island States

This association of smaller island states pushes for drastic reductions in CO2 emissions of 20 percent from the 1990 level by the year 2005. The governments of these islands fear that they would be particular hard hit in case global warming would occur, since their low luying countries would be especially vulnerable to possible rising sea-levels.

OPEC

The OPEC countries are not particularly keen on an agreement that would reduce the demand for their main export product -oil- if industrial countries use less oil for their production and consumption prices and thereby revenues for OPEC countries would fall. They therefore demand that in case an agreement is reached on the reduction of CO2 emissions, their countries should be financially compensated for the possible loss in revenues; otherwise they would not sign any agreement. The idea that countries like the U.S. or Western Europe would compensate countries like Saudi Arabia or Kuwait for their loss is politically unthinkable.

Outlook on the Negotiations

The success of the UN Conference on Climate Change in Kyoto will depend on the ability to find an agreement on an emission target for CO2 and for the other so-called greenhouse gases, since most of the countries now accept legally binding emissions caps.

There are still big gaps between some of the proposals especially between the EU proposal of 15% reduction by 2010 and the US proposal of reaching the 1990 level between 2008 and 2012. In the last preparation meeting in Bonn (Germany) before the conference, the delegates tried to find as much common ground as possible before going into the Kyoto conference, but it turned out that most of the difficult issues are still unresolved. The EU and the U.S. are still far apart in their positions and it is not clear if one of them will show any willingness to give on its position. The question of participation of developing countries is also still unresolved, since most of the industrial countries seem willing to exempt developing countries from the emissions reduction process -at least for a while. On the other side, the U.S. delegation wants some reassurance that developing countries will join the agreement at some point in the future. The U.S. delegation would probably like to see some sort of timetable that it could then present to the Senate, which sees the participation of developing countries as a precondition for approval of a treaty.

The developing countries do not seem willing to participate in the reduction process as long as their standards of living are much lower than in the industrial countries. Some countries which were exempt at the Rio summit, but are not developing countries, such as Argentina, seem prepared to join a treaty in some form. Less-developed countries might be persuaded to reduce future emissions if industrial countries would compensate them for the economic loss they would endure. The question is, are industrial countries prepared to commit themselves to transfer large sums of money when that aid budgets are already cut back, and if they already fear economic losses due to the reduction of their own emissions?

Developing countries might be given long time-lags before they have to join in, and perhaps the most dangerous development could be that especially smaller developing countries as well as small developed countries could be pressured into an agreement. There is the potential that the threat of trade sanctions would become a “means of persuasion” for countries to join such an agreement, perhaps supported by boycotts organized by influential environmental groups from big industrial countries. For example, Paul H. Nitze, former American chief negotiator at the Geneva arms negotiations and now a member of the Environmental Defense Fund, suggested in a recent newspaper article that in case of a tradable budget system, participating countries could be deterred from violating the agreement through inspections by an international agency (just as it is done by the International Atomic Energy Agency) and possible sanctions or embargoes could be imposed on these countries by the UN security council, such as is done under nuclear weapons treaties. This might be technically possible, but CO2 emissions are not weapons and to punish a country for producing too much CO2 (because companies want to provide products for their customers) as if it had produced atomic weapons seems unwise.

Such actions would be a threat to free trade with enormous damage to the world economy, and once started, the erosion of world trade could increase very quickly.

1. Many economists like the idea of a permits trading system because of its cost-saving advantage, especially in comparison to a command-and-control policy.

2. Department of Energy (1997), “Scenarios of U.S. Carbon Reductions -Potential Impacts of Energy Technologies by 2010,” released September 25, 1997.

3. Cited by The Economist, June 14, 1997, p. 89.

4. Scott Morrison, (1997), “Canada buckles on greenhouse targets,” in Financial Times November 5, 1997, p.4.

5. Source: International Energy Agency cited by The Economist, June 28th 1997, p. 41.

CO2 Effects on Ocean Currents

Researchers Thomas F. Stocker and Andreas Schmitter, using a simplified, three-basin zonally averaged circulation model, coupled to a simple energy-balance model of the atmosphere, have shown that CO2 levels as well as the rate of increase may have an effect on the “thermohaline” circulation of the North Atlantic Ocean. Known as the “ocean conveyer belt,” this current is a “gigantic overturning motion” which pushes warm surface waters to the north giving off heat then sinking and returning to the south as cold water at a depth of 2 km.

The computer model showed that an increase of CO2 to 750 parts per million by volume (ppmv) in the next 100 years would permanently shut down the circulation. The model also showed that if the CO2 concentration of 750 ppmv were reached more slowly it would slow but not shut down the circulation. The current, caused by temperature and salinity, may respond adversely to large injections of freshwater that may occur from greater rainfall in the northern latitudes, as has been predicted by General Circulation Models. Deep ocean sediments suggest that when the thermohaline circulation has broken down in the past it caused cold spells in Europe which lasted for hundreds of years (“Influence of CO2 emission rates on the stability of the thermohaline circulation,” Nature, August 28, 1997).

The model used, however, has some problems. In an editorial comment on the research Stefan Rahmstorf pointed out that “. . . a simple model like this cannot be expected to make accurate quantitative predictions. The key result of their study lies not in exact numbers, it is in the principle that the rate at which greenhouse-gas concentrations increase is crucial for the stability of the ocean circulation.” Rahmstorf later concludes, “Climate models are still too coarse to accurately predict how vulnerable the ocean circulation is, but they suggest that crossing a critical limit is within the range of possibilities for the next century” (“Risk of sea-change in the Atlantic,” Nature, August 28, 1997).

China May Benefit From Climate Change

Environmentalists have long decried the possible detrimental effects of climate change on the developing countries. Some Chinese scientists, however, believe that climate change could hold many benefits for their country.

Ren Zhenqiu, research fellow of the Chinese Academy of Meteorological Science, for example, argues that a warmer climate would cause the prevailing westerly summer wind to move further inland bringing more rainfall, improving agriculture yields in previously drought plagued areas.

Zhang Piyuan, professor of the Institute of Geography under the Academy of Sciences, using archives from the Palace Museum, found that agriculture output was higher during the warm period between 1750 – 1790 than during the cold period between 1841 – 1890.

Ren noted that the world’s four major civilizations appeared one after the other during earth’s warm state 6,000 to 4,000 years ago. North China was warm and damp and covered with forests and the desert existed primarily in the remote west. Furthermore, natural disasters were less frequent during the warm periods. Ren concludes, “Warm periods are the economically and culturally prosperous periods of mankind. . . . Desertification is caused by global cold, a severe environment, along with man-created sabotage. The natural factor is essential.” According to a book by Cambridge University, the decline of China’s Ming Dynasty corresponds to the arrival of colder weather and frequent natural disasters.

Ren believes that “The influence from both artificial and natural factors should be equally stressed. . . . It has not been determined as to which is the main reason leading to the climate change – natural influence or greenhouse effect.” He concludes, “I only hope that scholars do not merely stress the disadvantage of warming climate like the convention.” The article, “The Benefits of Climate Change? China’s Take on Global Warming,” can be found at www.weathervane.rff.org/.

Etc.

Gore’s Hard Sell

A focus group study of homeowning, college graduates in Bethesda, Md. conducted by The Alliance to Save Energy, showed that the global warming scare may be a hard sell to the American public. The following is reported in the Wall Street Journal (August 26, 1997). “During a discussion the skeptics tended to convince others that climatic change wasn’t happening while an incredulous moderator looked on. Cynicism about government played a larger role.

Participant 1: “But of course it [global warming] gives them [scientists] more grant money to keep up their jobs, to keep doing that type of research.”

Moderator: “So it is a political agenda?

Participant 2: “Yes, it is.”

Participant 1: “I think some of it is.”

Participant 3: “If I’m watching TV, and I hear about [global warming], I laugh at it. Or I don’t worry about it.”

IPCC’s Political Summary

In a letter to Nature (January 11, 1996) Michael Grubb, Lead Author, Working Group III of the IPCC, wrote, “The ‘Policymakers’ Summary’ is not a technical summary. Although usually drafted by the experts to put all key findings ‘on the table’, the final text represents a painstakingly negotiated statement of what governments officially accept as a balanced account of the state of knowledge and reasoned judgement, based on the chapters. Governments cannot alter the chapters, and the authors cannot alter the Policmakers’ Summary.”

Climate Change in Perspective

The Washington Post with its publication of “The Little Ice Age: When Cooling Gripped the World” (August 13, 1997) has finally put climate change in perspective. Alan Cutler, visiting scientist at the National Museum of Natural History, portrays the history of climate change as a primarily natural phenomenon. The Little Ice Age, which began about 500 years ago, was a climate phenomenon which ended sometime between 1850 and 1900, before the industrial revolution. Indeed, most of the warming of the past century occurred before the industrial revolution and is most likely a recovery from the Little Ice Age.

More importantly, however, the article points out that climate change has occurred frequently and rapidly in the past before man began to burn fossil fuels. Throughout history, ecosystems as well as human communities migrated to compensate for climate changes. Between 1000 and 1300 AD, for example, grapes were grown in England 300 miles further north than they are today because of warmer temperatures. During the Little Ice Age, however, the British celebrated the freezing of the Thames river with “Frost Fairs,” while in the United States one could walk from Manhattan to Staten Island on the frozen New York harbor.

There are two possible explanations for the Little Ice Age. Researchers have found a correlation between sunspot activity and temperature. The Little Ice Age occurred during a time of low sunspot activity, known as the Maunder Minimum. The sun’s energy output was about one quarter of one percent dimmer during that period.

Other researchers have examined the possibility of volcanic eruptions as a cause of colder periods. The “Year Without Summer,” for example, followed the eruption of Tambora which put ten times as much ash into the atmosphere as the Krakatoa eruption. One thing is for certain: climate change is a common phenomenon and will occur again regardless of man’s actions. The question is should man raise his puny arm to avert such changes or should he make himself more able to adapt to the inevitable change?

A sidebar to the article begins; “Although it often is claimed that global air temperatures are the warmest ever and that a warming trend in the last 20 years is unprecedented, climatologists know better.”

The warming we have experienced is small compared to the warming after the Little Ice Age which began in 1850 and occurred entirely from natural causes. That warming trend was interrupted by a 35 year cooling between 1940 and 1975 which had some climatologists predicting another ice age. What scientists are trying to decide is whether current warming is a result of increased atmospheric CO2 or whether this is just “part of a natural climate change of the sort that has been routine for millennia.”

Warming May Thicken Ice Shelves

According to a study in Nature (“Predicted reduction in basal melt rates on an Antarctic ice shelf in a warmer climate,” July 31, 1997), “A moderate warming of the climate could . . . lead to a basal thickening of the Filchner-Ronne Ice Shelf, perhaps increasing longevity.”

Though smaller ice shelves on the Antarctic Peninsula may be shrinking from warming, the larger shelves further south may actually thicken as a result of warming. For now, conditions in the far south are so cold that any warming that has or may occur presents no threat in the immediate future.

Anomalous Heat Wave

Two years ago Chicago experienced an unprecedented heat surge which lead to many deaths. Environmentalists blamed global warming. And the Clinton administration, to this day, cites the heat wave as evidence of the potential impacts of climate change.

A study by Thomas Karl and Richard Knight (Bulletin of the American Meteorological Society, 78(6), 1997) counters this view. The researchers found an increasing trend in apparent temperature between the years 1948 and 1995 in Chicago. However, when they accounted for changes in temperature measuring devices (which measure higher maximum and minimum temperatures) they found the trend to be “essentially close to zero.” The urban heat island effect also played a role since the researchers found that Midwestern stations surrounding the Chicago area did not have the same apparent temperature trend.

CO2 Effects on Biomass

In an article for Nature (“CO2 increases oceanic primary production,” August 7, 1997), researchers have found that increases in CO2 concentrations spurs primary production of biomass in the Earth’s oceans, which constitutes 40 percent of total primary production on Earth.

By manipulating CO2 concentrations at 18 stations in the Atlantic Ocean the researchers found that at elevated levels primary production in surface waters was 115 percent of the ambient level, and 119 percent of ambient levels in deeper chlorophyll-rich waters. The levels of CO2 used correspond roughly to those predicted by the IPCC’s “business as usual” scenario.

Another article in the same issue of Nature (“The fate of carbon in grasslands under carbon dioxide enrichment”), researchers found that a doubling of CO2 increased carbon uptake in grasslands, though they warn that the sequestration potential of grasslands has been overestimated. This is due to the fact that elevated CO2 concentration “causes a greater increase in carbon cycling than in carbon storage in grasslands.”

Emission Reduction Proposals Will Be Ineffective

Research conducted at the University of Illinois has shown that of the many short-term targets proposed for reducing greenhouse gas emissions, none of the proposed reductions “will lead to stabilization of carbon dioxide concentrations.”

According to climate researcher Atul Jain, computer simulations “show that the projected rise in atmospheric carbon dioxide concentrations from the year 1995 to 2010 is much larger than the projected effects of the proposed emission reductions. We also found that the effects of emission reductions on global-mean temperatures and sea level will not be measurable by the year 2010” (Agence France Presse, August 13, 1997).

The Climate Change Debate

In an article highlighting climate change skeptics, the New Scientist (“Greenhouse Wars,” July 19, 1997) shows that there is still significant uncertainty concerning the validity of global warming predictions. One of the most important issues currently debated is the role of water vapor in the atmosphere (see below). One thing that the satellite data have shown is that the temperatures of the surface and free troposphere move in different directions. Computer models have them moving in the same direction. According to David Parker of the British Meteorological Office, “The surface and mid-troposphere appear to be much less coupled than the models assume . . . . If the models don’t get tropospheric heating right, we are in trouble.”

If coupling of the surface and atmospheric temperatures is modeled incorrectly, then it is very likely that the models incorrectly handle the way water vapor moves between the surface and the free troposphere. This means that the positive feedback from water vapor – which turns “the greenhouse effect from a benign curiosity into a potential apocalypse. . .” – may not even exist. Simon Tett, a modeler and IPCC author, concedes, “the upper troposphere is probably drier than the models suggest.” Though there is, to date, little evidence for a negative feedback mechanism, things are moving in the direction of the skeptics.

The bottom line, though, is that the modelers and skeptics are not far apart. The skeptics concede that that a doubling of CO2 may raise temperatures by between 1 and 1.5 degrees C, the lower end of the modelers’ predictions. However, as Patrick Michaels, a climatologist with the University of Virginia, says, “You can’t make a case for a global apocalypse out of 1.5 degrees C warming.”

Assumption Dries Up

According to a paper appearing in the Bulletin of the American Meteorological Society (June 1997), the tropical free troposphere, the layer of air between 25,000 and 50,000 feet, is much dryer than climate modelers previously thought. Using west Pacific radiosonde data and infrared and microwave satellite data, Roy Spencer of NASA and William Braswell of Nichols Research Corporation were able to verify the skeptics’ assertion that the climate models have too much moisture present in the upper atmosphere, increasing warming estimates by 100 percent. If Spencer and Braswell’s data are correct, warming estimates will need to be revised downward from 2 degrees C warming over the next one hundred years to 1 degree C.

Soaking Up Greenhouse Gases

For many years scientists have been puzzled by carbon dioxide that seems to disappear each year without a trace. When comparing total carbon dioxide releases with known sinks, researchers cannot account for approximately 1 to 2 billion metric tons of the greenhouse gas. Recent scientific evidence, however, has shown that forests store much more carbon than previously thought. In the past scientists believed that the amount of carbon dioxide sequestered by trees was roughly equal to the amount given off through respiration. One of the reasons for underestimating the carbon-capturing potential of forests is that researchers did not include the carbon stored in peat and other organic matter in soils, which accounts for about two-thirds of the carbon stored by forests. Also, forests are expanding in many areas of the world.

One study, done by the U.S. Department of Agriculture Forest Service Laboratory, found that, “the increase in biomass and organic matter on U.S. forest lands over the last 40 years has stored enough carbon to offset 25% of U.S. greenhouse gas emissions for that period.” Other studies have shown that tropical forests sequester up to 200 metric tons of carbon dioxide per hectare.

A computer model at the Environmental Sciences Division of the Oak Ridge National Laboratory in Tennessee suggests that harvesting and replanting fast-growing forests is more effective than storing carbon in mature forests. When harvested trees are used in construction it takes carbon out of circulation. The New Zealand Forest Research Institute Ltd., found that a radiata pine plantation takes 112 metric tons of carbon out of circulation each time it is harvested and replanted (Science, “Resurgent Forests Can Be Greenhouse Gas Sponges,” July 18, 1997).

Warming Occurs Mostly at Night

A study appearing in Science (July 18, 1997), shows that the warming over the last half century has occurred primarily at night. Between 1950 and 1993 nighttime warming has closed the gap between maximum and minimum temperatures. The global average minimum temperature has risen by 0.186 degrees C while the global average maximum increased by 0.088 degrees C. In some places, such as the Southern United States and Eastern Canada, daytime maximum temperatures have dropped, reducing the gap even further in those areas.

Possible beneficial effects from nighttime warming include lower heating costs for homeowners and longer growing seasons for farmers. Adverse effects may include greater growth of harmful insects and weeds and lower yields by causing plants to expend energy faster at night. Winter wheat yields may also be lower (Science News, July 19, 1997).

Etc.

Gelbspan, Feeling the Heat

Ross Gelbspan, author of The Heat is On, is feeling the heat himself. In the book he attacks the integrity of several well-known greenhouse skeptics. His own integrity, however, is now in question. The dust cover on his book touts him as a Pulitzer Prize-winning journalist, for his contribution to a series of stories for the Boston Globe in 1984.

Gelbspan, though, has never won the Pulitzer Prize. He was just an editor involved with the series of articles for which seven Boston Globe staff writers won the award. An internet search (www.pulitzer.org/search/searchform.html) of past winners confirms that Gelbspan has not won the award. However, in an article about the prize, the Globe did include a profile of Gelbspan and another editor involved in the project as well as a profile of the executive editor John Driscoll.

When asked if claiming a Pulitzer Prize under these conditions was acceptable, John McCaughey, a veteran Washington reporter, said “I wouldn’t do it, would you? It’s what the English call ‘sharp practice’ and others call ‘resume inflation'” (The Electricity Daily, July 31, 1997). For further information on Gelbspan, see the Science and Environmental Policy Project’s web page at www.his.com/~sepp.

What About Clouds?

According to the Anchorage Daily News (July 10, 1997) the U.S. Department of Energy’s Atmospheric Radiation Measurement program is going to fund a 10-year, $10 million study to “track how clouds soak up or reflect the sun’s energy in the Earth’s polar regions.” The effect of clouds on climate change is still a mystery for scientists. Sometimes clouds cool the earth, at other times they keep it warm.

Knut Stamnes, a researcher at the Geophysical Institute at the University of Alaska Fairbanks, asks, “Are increased greenhouse gases going to have an effect or not?” His answer? “To understand that, we need to understand what clouds do.”

Sensors located Alaska’s North Slope, Oklahoma and Guam will provide new information that will lead to a greater understanding of how clouds affect global climate change in polar, midlatitude and tropical areas. According to Martha Krebs, director of DOE’s Office of Energy Research, “The question is whether or not the use of energy is going to cause a major impact on our environment . . . . That requires more data, and better and more accurate models.”

Melting Icecaps, Schmelting Icecaps

According to David Vaughan, a British Antarctic Survey member, “At current warming rates it will take 200 years before the problem in the Antarctic became serious . . . . And it is very unlikely that the warming trend in the Antarctic Peninsula could be sustained for that length of time without very major changes elsewhere which would make this issue rather irrelevant.”

Warnings of rising seas that will flood island states are overblown and, according to Vaughan, it is very possible that the “effects of oceanographic conditions on the ice shelves could thicken them” (Daily Mail, July 10, 1997).

Birds of a Feather Arrive Early Together

Ecologists are puzzled by the return of some species of birds earlier in the spring than usual. According to records kept by ornithologist Elizabeth Browne Losey, birds are returning to Michigan’s Upper Peninsula 21 days earlier than they did in 1965, suggesting that spring’s arriving earlier than before.

Though a report by the World Wildlife Fund recently warned that, “The first signs of climate change have been detected and can be seen in our own back yards,” ecologists are more cautious about blaming ecological changes on human-induced climate change since “North America’s ecological systems have always been in flux.”

Eighteen thousand years ago ice sheets two miles thick covered the northern half of the American continent. Also, the mid 19th century saw the Little Ice Age with temperatures a few degrees colder than now. In fact, the warming we have experienced over the last one hundred years may be a natural recovery from that cooler period.

Dan Fagre, a research ecologist with the U.S. Geological Survey’s Biological Resources Division, said, “Our goal is not necessarily to say human-induced climate change is responsible as much as to say that things are changing.”

Regardless, some ecologists are worried due to melting glaciers in Glacier National Park, warmer waters off the coast of California, declining bird and salmon populations, and other changes. Ken Cole, a government ecologist based in Flagstaff, Arizona says, “I think we can eventually do it but I’m not ready to commit myself and say that these changes are due to climate change and not these other causes.”

David Peterson, professor at the University of Washington states, “Change is natural and normal. The question at this point is: Are the changes that we’re seeing really natural or are they human-caused? And that poses some really tough questions” (Associated Press, July 7, 1997).

New and Improved Climate Modeling Computers

Japan’s Science and Technology Agency will develop a new computer system called the Earth Simulator to model regional climate variations with greater precision. To date limitations on computer power have frustrated the ability of scientists to accurately model the earth’s climate systems.

What will become the world’s fastest dedicated parallel-processing computer, the Earth Simulator will be able to model temperature variations on a grid 100 times finer than current advanced simulators. The Earth Simulator will allow scientists to better understand the regional effects of climate change (The Nikkei Weekly, July 7, 1997).

Early Humans Experienced Rapidly Changing Sea Levels

According to a study by Heiner et. al. appearing in the journal Science (“Early Humans and Rapidly Changing Holocene Sea Levels in the Queen Charlotte Islands – Hecate Strait, British Columbia, Canada,” July 4, 1997), humans during the Holocene era experienced rapidly changing sea levels.

Marine cores from the continental shelf edge of British Columbia, Canada show that sea level varied from -153 to +16 m between 14,600 and 10,100 calendar years B.P. Using marine core data and archeological evidence, researchers were able to determine that local sea levels rose rapidly (five centimeters per year) during the period of early human occupation.

To put this in perspective, climate change catastrophists are predicting a 2 foot increase in sea levels from global warming over the next 100 years. A five centimeter per year rise, however, would increase sea levels by about 19 feet.

“In this context,” states the researchers, “it is interesting that the Gwaii Haanas Haida Indian oral history abounds in legends of rapidly rising seas.” It is also interesting to note that sea levels changed by magnitudes far exceeding anything predicted by climate change proponents in the absence of anthropogenic influences.