Is the airborne fraction of anthropogenic CO2 emissions increasing? Export

@article{citeulike:6109801, abstract = {Several recent studies have highlighted the possibility that the oceans and terrestrial ecosystems have started loosing part of their ability to sequester a large proportion of the anthropogenic CO2 emissions. This is an important claim, because so far only about 40\% of those emissions have stayed in the atmosphere, which has prevented additional climate change. This study re-examines the available atmospheric CO2 and emissions data including their uncertainties. It is shown that with those uncertainties, the trend in the airborne fraction since 1850 has been 0.7 ± 1.4\% per decade, i.e. close to and not significantly different from zero. The analysis further shows that the statistical model of a constant airborne fraction agrees best with the available data if emissions from land use change are scaled down to 82\% or less of their original estimates. Despite the predictions of coupled climate-carbon cycle models, no trend in the airborne fraction can be found. }, author = {Knorr, Wolfgang}, citeulike-article-id = {6109801}, citeulike-linkout-0 = {http://www.agu.org/pubs/crossref/2009/2009GL040613.shtml}, citeulike-linkout-1 = {http://dx.doi.org/10.1029/2009GL040613}, day = {7}, doi = {10.1029/2009GL040613}, issn = {0094-8276}, journal = {Geophysical Research Letters}, keywords = {anthropogenic, atmosphere, bias, carbon, climate, co2, emissions, trend}, month = {November}, number = {21}, pages = {L21710+}, posted-at = {2009-11-13 15:38:50}, priority = {2}, title = {Is the airborne fraction of anthropogenic CO2 emissions increasing?}, url = {http://dx.doi.org/10.1029/2009GL040613}, volume = {36}, year = {2009} }

TY - JOUR ID - citeulike:6109801 L3 - citeulike-article-id:6109801 N2 - Several recent studies have highlighted the possibility that the oceans and terrestrial ecosystems have started loosing part of their ability to sequester a large proportion of the anthropogenic CO2 emissions. This is an important claim, because so far only about 40% of those emissions have stayed in the atmosphere, which has prevented additional climate change. This study re-examines the available atmospheric CO2 and emissions data including their uncertainties. It is shown that with those uncertainties, the trend in the airborne fraction since 1850 has been 0.7 ± 1.4% per decade, i.e. close to and not significantly different from zero. The analysis further shows that the statistical model of a constant airborne fraction agrees best with the available data if emissions from land use change are scaled down to 82% or less of their original estimates. Despite the predictions of coupled climate-carbon cycle models, no trend in the airborne fraction can be found. IS - 21 JF - Geophysical Research Letters SN - 0094-8276 TI - Is the airborne fraction of anthropogenic CO2 emissions increasing? VL - 36 SP - L21710 KW - anthropogenic KW - atmosphere KW - bias KW - carbon KW - climate KW - co2 KW - emissions KW - trend AU - Knorr, Wolfgang PY - 2009/11/07/ UR - http://dx.doi.org/10.1029/2009GL040613 ER -