Summary: Congressional hearings often bring America’s best to testify, long-form analysis about our greatest problems. Such as what scientists know about the effects of climate change on Earth’s plants and animals. It’s one expert’s perspective, and so more interesting than the blander consensus view of the IPCC. Written for us non-scientists, with lots of detail, for those who like their science straight up. See his bio at the end.
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Excerpt from the testimony of Daniel B. Botkin
Senate Subcommittee on Clean Air and Nuclear Safety
“Climate Change: The Need to Act Now”
18 June 2014
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(1) {W}e have been living through a warming trend driven by a variety of influences. However, it is my view that this is not unusual, and contrary to the characterizations by the IPCC and the National Climate Assessment, these environmental changes are neither apocalyptic nor irreversible.
(2) My biggest concern is that both the reports present a number of speculative, and sometimes incomplete, conclusions embedded in language that gives them more scientific heft than they deserve. The reports are “scientific-sounding” rather than based on clearly settled facts or admitting their lack. Established facts about the global environment exist less often in science than laymen usually think.
(3) HAS IT BEEN WARMING?
Yes, we have been living through a warming trend, no doubt about that. The rate of change we are experiencing is also not unprecedented, and the “mystery” of the warming “plateau” simply indicates the inherent complexity of our global biosphere. Change is normal; life on Earth is inherently risky. It always has been. The two reports, however, makes it seem that environmental change is apocalyptic and irreversible. It is not.
(4) IS CLIMATE CHANGE VERY UNUSUAL?
No, it has always undergone changes.
(5) ARE GREENHOUSE GASES INCREASING?
Yes, CO2 rapidly.
(6) IS THERE GOOD SCIENTIFIC RESEARCH ON CLIMATE CHANGE?
Yes, a great deal of it.
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(7) ARE THERE GOOD SCIENTISTS INVOLVED IN THE IPCC 2014 REPORT?
Yes, the lead author of the Terrestrial (land) Ecosystem Report is Richard Betts, a coauthor of one my scientific papers about forecasting effects of global warming on biodiversity.
(8) ARE THERE SCIENTIFICALLY ACCURATE STATEMENTS AT PLACES IN THE REPORT?
Yes, there are.
(9) What I sought to learn was the overall take-away that the reports leave with a reader. I regret to say that I was left with the impression that the reports overestimate the danger from human-induced climate change and do not contribute to our ability to solve major environmental problems. I am afraid that an “agenda” permeates the reports, an implication that humans and our activity are necessarily bad and ought to be curtailed.
(10) ARE THERE MAJOR PROBLEMS WITH THE REPORTS?
Yes, in assumptions, use of data, and conclusions.
(11) My biggest concern about the reports is that they present a number of speculative, and sometimes incomplete, conclusions embedded in language that gives them more scientific heft than they deserve. The reports, in other words, are “scientific-sounding,” rather than clearly settled and based on indisputable facts. Established facts about the global environment exist less often in science than laymen usually think.
(12) The two reports assume and/or argue that the climate warming forecast by the global climate models is happening and will continue to happen and grow worse. Currently these predictions are way off the reality (Figure 1). Models, like all scientific theory, have to be tested against real-world observations. Experts in model validation say that the climate models frequently cited in the IPCC report are little if any validated. This means that as theory they are fundamentally scientifically unproven. 13. Figure 1: Climate model forecasts compared to real world temperature observations (From John Christy, University of Alabama and Alabama State Climatologist. Reproduced with permission from him.
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(14) The reports suffer from the use term “climate change” with two meanings: natural and human-induced. These are both given as definitions in the IPCC report and are not distinguished in the text and therefore confuse a reader. (The White House Climate Change Assessment uses the term throughout including its title, but never defines it.) There are places in the reports where only the second meaning — human induced — makes sense, so that meaning has to be assumed. There are other places where either meaning could be applied.
In those places where either meaning can be interpreted, if the statement is assumed to be a natural change, then it is a truism, a basic characteristic of Earth’s environment and something people have always known and experienced. If the meaning is taken to be human-caused, then in spite of the assertions in the report, the available data do not support the statements.
(15) Some of the reports’ conclusions are the opposite of those given in articles cited in defense of those conclusions.
For example, the IPCC 2014 Terrestrial Ecosystem Report states that “there is medium confidence that rapid change in the Arctic is affecting its animals. For example, 7 of 19 subpopulations of the polar bear are declining in number” citing in support of this an article by Vongraven and Richardson, 2011. That report states the contrary, that the “‘decline’ is an illusion.
In addition, I have sought the available counts of the 19 subpopulations. Of these, only three have been counted twice; the rest have been counted once. Thus no rate of changes in the populations can be determined. The first count was done in 1986 for one subpopulation.
On May 22, Vongraven, a member of the international team that created these estimates [Polar Bear Specialist Group, PBSG] , stated that the polar bear population size, “never has been an estimate of total abundance in a scientific sense, but simply a qualified guess given to satisfy public demand … the range given for total global population should be viewed with great caution as it cannot be used to assess population trend over the long term.” {source here}
The US Marine Mammal Commission, charged with the conservation of this species, acknowledges “Accurate estimates of the current and historic sizes of polar bear stocks are difficult to obtain for several reasons – the species‘ inaccessible habitat, the movement of bears across international boundaries, and the costs of conducting surveys.”
According to Dr. Susan Crockford, “out of the 13 populations for which some kind of data exist, five populations are now classified by the PBSG as ‘stable’ (2 more than 2009), one is still increasing, and 3 have been upgraded from ‘declining’ to ‘data deficient’. . . . That leaves 4 that are still considered ‘declining’ ‐ 2 of those judgments are based primarily on concerns of overhunting, and one is based on a statistically insignificant decline that may not be valid and is being reassessed (and really should have been upgraded to ‘data deficient’). That leaves only one population – Western Hudson Bay – where PBSG biologists tenaciously blame global warming for all changes to polar bear biology, and even then, the data supporting that conclusion is still not available. ”
(16) Some conclusions contradict and are ignorant of the best statistically valid observations.
For example, the Terrestrial Ecosystems Report states that “terrestrial and freshwater ecosystems have sequestered about a quarter of the carbon dioxide emitted to the atmosphere by human activities in the past three decades (high confidence).” I have done the first statistically valid estimate of carbon storage and uptake for any large area of Earth’s land, the boreal forests and eastern deciduous forest of North America, and subtropical forests in Queensland, Australia.
The estimates of carbon uptake by vegetation used by IPCC and in major articles cited by the reports are based on what can best be called “grab samples,” a relatively small number of studies done at a variety of times using a variety of methods, mainly in old-growth areas. The results reported by IPCC overestimate carbon storage and uptake by as much as 300%.
(17) The IPCC Report for Policymakers on Impacts, Adaptation, and Vulnerability repeats the assertion of previous IPCC reports that “large fraction of species” face “increase extinction risks” (p15).
Overwhelming evidence contradicts this assertion. It has been clearly shown that models used to make these forecasts, such as climate envelope models and species-area curve models, make incorrect assumptions that lead to erroneous conclusions, over-estimating extinction risks. Surprisingly few species became extinct during the past 2.5 million years, a period encompassing several ice ages and warm periods.
Among other sources, this is based on information in the book Climate Change and Biodiversity edited by Thomas Lovejoy, one of the leaders in the conservation of biodiversity. The major species known to have gone extinct during this period are 40 species of large mammals in North America and Northern Europe. (There is a “background” extinction rate for eukaryotic species of roughly one species per year.)
(18) THE REPORTS GIVE THE IMPRESSION THAT LIVING THINGS ARE FRAGILE AND RIGID, unable to deal with change. The opposite is the case. Life is persistent, adaptable, and adjustable.
(19) STEADY-STATE ASSUMPTION:
There is an overall assumption in the IPCC 2014 report and the White House Climate Change Assessment that all change is negative and undesirable – that it is ecologically and evolutionarily unnatural, bad for populations, species, ecosystems, for all life on planet Earth, including people. This is the opposite of the reality. The environment has always changed and is always changing and living things have had to adapt to these changes. Interestingly, many, if not most, species that I have worked on or otherwise know about require environmental change.
(20) The IPCC Summary for Policy Makers on Impacts, Adaptation, and Vulnerability makes repeated use of the term “irreversible” changes. A species going extinct is irreversible, but little else about the environment is irreversible. The past confirms this. Glaciers have come and gone repeatedly. The Northwest Passage of North America has gone and come again. The average temperature has greatly exceeded the present and forecasted and has declined only to rise again.
Implicit in this repeated use of irreversible is the belief that Earth’s environment is constant — stable, unchanging — except when subjected to human actions. This is obviously false from many lines of evidence, including the simple experience of all people who have lived before the scientific-industrial age and those who live now and so such work as farm, manage rivers, wildlife and forests.
The extreme over-emphasis on human-induced global warming has taken our attention away from many environmental issues that used to be front and center but have been pretty much ignored in the 21st century. By my count there are ten issues, including global warming. I know it is easier for people to focus on just one issue at a time and ten seems overwhelming, but they can all be part of, and can be cast in terms of, biodiversity and sustainability. A singular focus on climate change as the driver of the other nine obscures the best solutions to the full suite of environmental challenges we face. In terms of “the need to act now” it is on these issues that we should focus, with the concern with a possible global warming prioritized properly with that group.
Other environmental Issues that need our attention now:
- Energy
- Fresh water
- Habitat destruction
- Invasive-species control
- Direct threats to Endangered species
- Pollution by directly toxic substances
- Fisheries
- Forests
- Phosphorus and other essential minerals
The Terrestrial report in a sense acknowledges this, for example by stating: “Climate stresses occur alongside other anthropogenic influences on ecosystems, including land-use changes, nonnative species, and pollution, and in many cases will exacerbate these pressures (very high confidence).”
(21) Do the problems with these reports mean that we can or should abandon any concerns about global warming or abandon any research about it? Certainly not, but we need to put this issue within an appropriate priority with other major here – and – now environmental issues that are having immediate effects.
(22) I reviewed and provided comments on both the IPCC 2014 report and the draft White House’s National Climate Change Assessment and, unfortunately, it appears that these issues have not been addressed in the final assessment. For example in regard to the White House Report, I stated:
- a. “The executive summary is a political statement, not a scientific statement. It is filled with misstatements contradicted by well-established and well-known scientific papers.”
- b. “Climate has always affected people and all life on Earth, so it isn’t new to say it is ‘already affecting the American people.’ This is just a political statement.”
- c. “It is inappropriate to use short-term changes in weather as an indication one way or another about persistent climate change.”
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About Daniel B. Botkin
From his website
Daniel Botkin is a biologist who has helped solve major environmental issues, and a writer about nature. Known for his scientific contributions in ecology and environment, he has also worked as a professional journalist and has degrees in physics, biology, and literature. His books and lectures show how our cultural legacy often dominates what we believe to be scientific solutions. He discusses the roles of scientists, businessmen, stakeholders, and government agencies in new approaches to environmental issues.
Faculty Positions
- Yale School of Forestry and Environmental Studies
- Chairman, Environmental Studies Program, UC-Santa Barbara
- Director of Program on Global Change., George Mason U
- Research scientist, Woods Hole Marine Biological Laboratory.
Author
- Widely used, prizewinning college science text.
- 13 books, most recently The Moon in the Nautilus Shell, and Powering the Future: A Scientist’s Guide to Energy Independence. Best known for Discordant Harmonies: A New Ecology for the 21st Century.
- Several hundred articles in professional journals, popular magazines and newspaper op-eds.
Research
- More than 45 years of research on possible effects of climate change on biodiversity.
- Developed the first successful computer ecosystem model, still in worldwide use in more than 50 versions.
- Extensive field research in wilderness areas, in forests from Alaska to Michigan to Siberia and in African plains.
- Was one of the first ecologists to investigate possible ecological effects of climate change.
- Conducted extensive scientific studies of endangered species.
- Used historical information to recover wildlife population sizes and sea ice changes.
See here for his bio, honors, and publications.
For More Information
Hat tip on Botkin’s testimony to Judith Curry (Prof, GA Institute Technology)
(a) Reference Pages about climate on the FM sites:
- Recommended: The important things to know about global warming
- My posts, by subject
- Studies & reports by scientists, by subject
- The history of climate fears
(b) Climate scientists speak to us:
- Peer review of scientific work – another example of a flawed basis for public policy, 22 January 2009
- Science in action, a confused and often nasty debate among scientists, 5 February 2009
- An important letter sent to the President about the danger of climate change, 24 October 2009
- A look at global warming written in a cooler and more skeptical time, giving us a better understanding of climate science, 23 November 2009
- Slowly more evidence emerges, and more scientists speak out about drivers of climate change, 26 May 2010
- “Most scientific papers are probably wrong” – New Scientist, 20 June 2010
- Puncturing the false picture of a scientific consensus about the causes and effects of global warming, 20 September 2010
- A famous scientists makes a startling admission about Earth’s climate, 26 April 2012
- A look at the debate among climate scientists about global warming, 31 July 2012
- Climate scientists speak to us. What is their consensus opinion?, 19 February 2014
- Are scientists doing a good job of warning us about climate change?, 27 February 2014
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