Positive feedback between global warming and atmospheric CO2 concentration inferred from past climate change Export

@article{citeulike:5971611, abstract = {There is good evidence that higher global temperatures will promote a rise of greenhouse gas levels, implying a positive feedback which will increase the effect of anthropogenic emissions on global temperatures. However, the magnitude of this effect predicted by the available models remains highly uncertain, due to the accumulation of uncertainties in the processes thought to be involved. Here we present an alternative way of estimating the magnitude of the feedback effect based on reconstructed past changes. Linking this information with the mid-range Intergovernmental Panel on Climate Change estimation of the greenhouse gas effect on temperature we suggest that the feedback of global temperature on atmospheric CO2 will promote warming by an extra 15–78\% on a century-scale. This estimate may be conservative as we did not account for synergistic effects of likely temperature moderated increase in other greenhouse gases. Our semi-empirical approach independently supports process based simulations suggesting that feedback may cause a considerable boost in warming. }, author = {Scheffer, Marten and Brovkin, Victor and Cox, Peter M.}, citeulike-article-id = {5971611}, citeulike-linkout-0 = {http://www.agu.org/pubs/crossref/2006/2005GL025044.shtml}, citeulike-linkout-1 = {http://dx.doi.org/10.1029/2005GL025044}, day = {26}, doi = {10.1029/2005GL025044}, issn = {0094-8276}, journal = {Geophysical Research Letters}, keywords = {carbon, climate, co2, correlation, feedback, glacial, holocene, ice-age, interglacial, lia, paleoclimate, temperature}, month = {May}, number = {10}, pages = {L10702+}, posted-at = {2009-10-19 17:27:47}, priority = {2}, title = {Positive feedback between global warming and atmospheric CO2 concentration inferred from past climate change}, url = {http://dx.doi.org/10.1029/2005GL025044}, volume = {33}, year = {2006} }

TY - JOUR ID - citeulike:5971611 L3 - citeulike-article-id:5971611 N2 - There is good evidence that higher global temperatures will promote a rise of greenhouse gas levels, implying a positive feedback which will increase the effect of anthropogenic emissions on global temperatures. However, the magnitude of this effect predicted by the available models remains highly uncertain, due to the accumulation of uncertainties in the processes thought to be involved. Here we present an alternative way of estimating the magnitude of the feedback effect based on reconstructed past changes. Linking this information with the mid-range Intergovernmental Panel on Climate Change estimation of the greenhouse gas effect on temperature we suggest that the feedback of global temperature on atmospheric CO2 will promote warming by an extra 15–78% on a century-scale. This estimate may be conservative as we did not account for synergistic effects of likely temperature moderated increase in other greenhouse gases. Our semi-empirical approach independently supports process based simulations suggesting that feedback may cause a considerable boost in warming. IS - 10 JF - Geophysical Research Letters SN - 0094-8276 TI - Positive feedback between global warming and atmospheric CO2 concentration inferred from past climate change VL - 33 SP - L10702 KW - carbon KW - climate KW - co2 KW - correlation KW - feedback KW - glacial KW - holocene KW - ice-age KW - interglacial KW - lia KW - paleoclimate KW - temperature AU - Scheffer, Marten AU - Brovkin, Victor AU - Cox, Peter PY - 2006/05/26/ UR - http://dx.doi.org/10.1029/2005GL025044 ER -