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The uncertainty of climate science

In today’s listing of new science papers published by the American Geophysical Union, two papers illustrate quite clearly why the certainty of knowledge expressed by Presidential Science Advisor John Holdren in his testimony before Congress on Thursday is both mistaken and dangerous.

First, a paper published in Geophysical Research Letters outlines a new and reduced estimate of the strength of what scientists call the biological carbon pump. The biological carbon pump is the amount of carbon lost to the atmosphere and ocean systems because it is absorbed by sea life which upon death sink to the bottom of the oceans to form long term sedimentary layers. This pump is a crucial component of all climate models, since it affects the amount of carbon available in the atmosphere and oceans.

Do scientists now know the strength of this pump? To quote the paper’s abstract:

The lack of consensus amongst different methodologies on the strength of the biological carbon pump emphasizes that our knowledge of a major planetary carbon flux remains incomplete.

Second, a paper published in the Journal of Geophysical Letter-Atmospheres attempts to measure whether increased greenhouse gases will increase or decrease the frequency of summer cyclones in the Northern Hemisphere. Their conclusion:

There is no consistency among the models as to whether the frequency of hemispheric-averaged summer cyclones will increase or decrease. For some subregions the sign of the trend is consistent across the vast majority of models, but even then there is a large spread in the magnitude of the trends. The general lack of consistency among models indicates that care is required when interpreting projected changes in summer weather systems.

The science sure appears “settled,” doesn’t it? Both papers attempt to address key claims made by global warming advocates. Both papers fail to do so, and admit bluntly in their abstracts that the science remains unclear and that care must be taken before any firm conclusions are reached.

Climate science is a complex field, with many conclusions and areas of uncertainty. Though there is a lot we do know, there is far more that we as yet do not understand. For any scientist or politician to claim a certainty of knowledge, as Holdren did in his testimony to Congress, does a disservice to science. To then use that claim as a justification for passing laws to restrict the freedom of Americans is downright unconscionable.

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Conscious Choice cover

Now available in hardback and paperback as well as ebook!

 

From the press release: In this ground-breaking new history of early America, historian Robert Zimmerman not only exposes the lie behind The New York Times 1619 Project that falsely claims slavery is central to the history of the United States, he also provides profound lessons about the nature of human societies, lessons important for Americans today as well as for all future settlers on Mars and elsewhere in space.

 
Conscious Choice: The origins of slavery in America and why it matters today and for our future in outer space, is a riveting page-turning story that documents how slavery slowly became pervasive in the southern British colonies of North America, colonies founded by a people and culture that not only did not allow slavery but in every way were hostile to the practice.  
Conscious Choice does more however. In telling the tragic history of the Virginia colony and the rise of slavery there, Zimmerman lays out the proper path for creating healthy societies in places like the Moon and Mars.

 

“Zimmerman’s ground-breaking history provides every future generation the basic framework for establishing new societies on other worlds. We would be wise to heed what he says.” —Robert Zubrin, founder of founder of the Mars Society.

 

All editions available at Amazon, Barnes & Noble, and all book vendors. The ebook can be purchased direct from my ebook publisher, ebookit, in which case you don't support the big tech companies and I get a bigger cut much sooner. Note that the price for the ebook, $3.99, goes up to $5.99 on September 1, 2022.

 

Autographed printed copies are also available at discount directly from me (hardback $24.95; paperback $14.95). Just email me at zimmerman @ nasw dot org.

2 comments

  • John M. Egan

    Al Gore, some good reading for you!

  • Alan

    Once again, we have so called scientists on the public dole trying to keep the gravy train going. There are plenty of other areas to explore without injecting themselves into the public’s lives via tax policy and life style changes avocated by the AL GORE do as I say, not as I do types.

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