Bombshell from Bristol: Is the airborne fraction of anthropogenic CO2 emissions increasing? – study says “no”

10 11 2009

Controversial new climate change results

University of Bristol Press release issued 9 November 2009

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New data show that the balance between the airborne and the absorbed fraction of carbon dioxide has stayed approximately constant since 1850, despite emissions of carbon dioxide having risen from about 2 billion tons a year in 1850 to 35 billion tons a year now.

This suggests that terrestrial ecosystems and the oceans have a much greater capacity to absorb CO2 than had been previously expected.

The results run contrary to a significant body of recent research which expects that the capacity of terrestrial ecosystems and the oceans to absorb CO2 should start to diminish as CO2 emissions increase, letting greenhouse gas levels skyrocket. Dr Wolfgang Knorr at the University of Bristol found that in fact the trend in the airborne fraction since 1850 has only been 0.7 ± 1.4% per decade, which is essentially zero.

The strength of the new study, published online in Geophysical Research Letters, is that it rests solely on measurements and statistical data, including historical records extracted from Antarctic ice, and does not rely on computations with complex climate models. Read the rest of this entry »


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Categories : Carbon dioxide, paleoclimatology

New geologic evidence of past periods of oscillating, abrupt warming, and cooling

10 11 2009

Guest post by Dr. Don J. Easterbrook, Emeritus Professor at Western Washington University

Two hundred years ago, Charles Lyell coined the phrase “The present is the key to the past.” In today’s highly contentious issues of global climate change, we might well add “The past is the key to the future, i.e., to forecast future geologic events, we must understand past climate changes.  This paper documents past global climate changes in the geologic and historic past.

Recent laser imaging of the Earth’s surface provides new evidence for abrupt, fluctuating, warm and cool climatic episodes that could not have been caused by changes in atmospheric CO2.  In a paper presented at the national meeting of the Geological Society of America in Portland, OR, Professor Don J. Easterbrook, Professor of Geology at Western Washington University, presented new data from airborne laser imagery showing well-defined, previously unknown, multiple moraines deposited by glaciers 11,700 to 10,250 years ago.

At least 9 significant, abrupt periods of warming that resulted in retreat of the Cordilleran Ice Sheet are documented by moraines from successive glacial retreats in the Fraser Lowland of NW Washington l(Fig. 1).  In addition, smaller multiple glacier recessions are found within the more prominent episodes of glacier retreat.  As indicated by the amount of glacier recession between each of the successive moraines, the warming events were of greater magnitude than those observed in recent centuries.

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Figure 1.  Successive terminal moraines from short–term glacier recessions caused by climatic warming between 11,700 and 10,250 years ago.

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Comments : 31 Comments »

Categories : paleoclimatology

Countdown to an “unprecedented warm decade” – 2 months to go

10 11 2009

Global Temperatures This Decade Will Be The Warmest On Record…

…And It Will Be Exploited By Those Who Fail To Understand The Reasons For The Rise

Guest post by Bob Tisdale

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INITIAL NOTES

For some visitors to this blog, this post will be a merging and rehashing of a few of my earlier posts. But this post is different in a very important way. I have attempted to simplify the discussion of El Nino-caused step changes for those with less technical backgrounds.

The post does assume the reader knows of El Nino and La Nina events. If not, here are links to two NOAA El Nino Frequently Asked Question web pages:
http://www.aoml.noaa.gov/general/enso_faq/
http://faculty.washington.edu/kessler/occasionally-asked-questions.html

The following narrated video “Visualizing El Nino” from the NASA/Goddard Space Flight Center Scientific Visualization Studio provides an excellent overview of the 1997/98 E; Nino, one of the El Nino events that created the aftereffects illustrated in this post.

YouTube Link:
http://www.youtube.com/watch?v=DbNzw1CCKHo

I have provided links to the referenced studies and to the posts that provide more detailed explanations at the end of the following. They do not appear within the general discussion of this post.

Many of the illustrations in the following are .gif animations, with 5- to 10-second pauses between cells. Read the rest of this entry »


Comments : 77 Comments »

Categories : ENSO, climate data

Lindzen and McIntyre’s Finnish TV interview – issues that US journalists fail to investigate

10 11 2009

The video showing the climate research work of Dr. Richard Lindzen of MIT and Steven McIntyre of Climate Audit is now up on YouTube. One of the most compelling portions of the program has to do with the erroneous reversal of the Tiljander sediments, and Dr. Michael Mann’s stubborn refusal to acknowledge his error, even though other authors of peer reviewed papers have done so. In my opinion, salvation of the hockey stick seems to trump the salvation of good science practice.

The investigative journalism here is refreshing, and well done. It’s the sort of thing CBS 60 minutes used to do.

Here is part 1, a transcript link follows:

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Comments : 57 Comments »

Categories : Climate News, media