Paper finds lifetime of CO2 in atmosphere is only 5.4 years — Paper presented at the SEVENTEENTH SYMPOSIUM ON THERMOPHYSICAL PROPERTIES
Paper finds lifetime of CO2 in atmosphere is only 5.4 years
http://hockeyschtick.blogspot.com/2013/08/paper-finds-lifetime-of-co2-in.html
A paper presented at the SEVENTEENTH SYMPOSIUM ON THERMOPHYSICAL PROPERTIES finds that the lifetime and residence time of man-made CO2 in the atmosphere is only about 5.4 years, far less than assumed by the IPCC. The paper corroborates prior work by Salby, Humlum et al, Frölicher et al, Cho et al, Calder et al, Francey etl, Ahlbeck, Pettersson, Segalstad, and others which has demonstrated that man-made CO2 is not the primary driver of atmospheric CO2.Fossil Fuel Emissions and Fossil CO2 in the Atmosphere
Luciano Lepori S, Gian Carlo Bussolino, Andrea Spanedda and Enrico Matteoli C
IPCF-CNR, Pisa, Italy
The comparison of fossil fuel emissions (6.4 GtC/yr) with the growth rate of atmospheric CO2 (3.2 GtC/yr) suggests that about half of the anthropogenic CO2 has not remained in the atmosphere: it has dissolved in the ocean or has been taken up by the land. The isotope ratio C13/C12 of atmospheric CO2 has been measured over the last decades using mass spectrometry. From these data the fraction of fossil CO2 in atmospheric CO2 is straightforwardly calculated: 5.9 %(1981) and 8.5 %(2002). These results indicate that the amount of past fossil fuel and biogenic CO2 remaining in the atmosphere, though increasing with anthropogenic emissions, did not exceed in 2002 66 GtC, corresponding to a concentration of 31 ppm, that is 3 times less than the CO2 increase (88 ppm, 24 %) which occurred in the last century. This low concentration (31 ppm) of anthropogenic CO2 in the atmosphere is consistent with a lifetime of t(1/2) = 5.4 years, that is the most reliable value among other in the range 2-13 years, obtained with different measurements and methods. Contrary to the above findings on the concentration of fossil CO2 and its residence time in the atmosphere, in the Fourth Assessment Report of the Intergovernmental Panel on Climate Change it is stated that almost 45 % of anthropogenic emissions, corresponding to 88 ppm or 24 % of the total CO2, have remained in the atmosphere with a mean lifetime of t(1/2) = 30.5 years. On these assumptions are based both the theory of Anthropogenic Global Warming and the climate models.
Related: New paper finds ocean along Baja California coast is a net source of CO2 to the atmosphere
H/T to The Stockholm Initiative site for finding this abstract [Google translation from Swedish]:
David …
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…Major Danish Daily Newspaper Warns: ‘Globe May Be On Path To Little Ice Age…Much Colder Winters…Dramatic Consequences’!
By P Gosselin on 9. August 2013
Another major European media outlet is asking: Where’s the global warming?
Image right: The August 7 edition of Denmark’s Jyllands-Posten, featured a major 2-page article on the globe’s 15-years of missing warming and the potential solar causes and implications.
Moreover, they are featuring prominent skeptic scientists who are warning of a potential little ice age and dismissing CO2 as a major climate driver. And all of this just before the release of the IPCC’s 5AR, no less!
Hat-tip: NTZ reader Arne Garbøl
The August 7 print edition of the Danish Jyllands-Posten, the famous daily that published the “Muhammad caricatures“, features a full 2-page article bearing the headline: ”The behavior of the sun may trigger a new little ice age” followed by the sub-headline: “Defying all predictions, the globe may be on the road towards a new little ice age with much colder winters.”
So now even the once very green Danish media is now spreading the seeds of doubt. So quickly can “settled science” become controversial and hotly disputed. The climate debate is far from over. And when it does end, it looks increasingly as if it’ll end in favor of the skeptics.
The JP writes that “many will be startled” by the news that a little ice age is a real possibility. Indeed, western citizens have been conditioned to think that nothing except warming is possible. Few have prepared for any other possibility.
In its latest 2-page report, the JP now appears to tell its readers that our views on climate science have to be much more open minded and unshackled from the chains of dogmatism.
JP starts by reminding readers that it was just over 100 years ago that the world had clawed itself out of the little ice age, which extended from 1400 – 1900, a time when the Thames river often froze over. All paths in determining the cause of the little ice age all seem to converge to a single factor: solar activity.
The Jyllands-Posten quotes David Hathaway:
‘We now have the lowest solar activity in 100 years,’ David Hathaway from American space research institute NASA newly concluded in connection to the release of