Amplification of Cretaceous Warmth by Biological Cloud Feedbacks Export

@article{citeulike:3871705, abstract = {The extreme warmth of particular intervals of geologic history cannot be simulated with climate models, which are constrained by the geologic proxy record to relatively modest increases in atmospheric carbon dioxide levels. Recent recognition that biological productivity controls the abundance of cloud condensation nuclei (CCN) in the unpolluted atmosphere provides a solution to this problem. Our climate simulations show that reduced biological productivity (low CCN abundance) provides a substantial amplification of CO2-induced warming by reducing cloud lifetimes and reflectivity. If the stress of elevated temperatures did indeed suppress marine and terrestrial ecosystems during these times, this long-standing climate enigma may be solved. 10.1126/science.1153883}, author = {Kump, Lee R. and Pollard, David}, citeulike-article-id = {3871705}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1153883}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/18403703}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=18403703}, day = {11}, doi = {10.1126/science.1153883}, journal = {Science}, keywords = {ccn, climate, cloud, co2, cretaceous, ecosystem, feedback, ocean, paleoclimate, productivity, terrestrial}, month = {April}, number = {5873}, pages = {195+}, posted-at = {2009-01-09 15:28:39}, priority = {2}, title = {Amplification of Cretaceous Warmth by Biological Cloud Feedbacks}, url = {http://dx.doi.org/10.1126/science.1153883}, volume = {320}, year = {2008} }

TY - JOUR ID - citeulike:3871705 L3 - citeulike-article-id:3871705 N2 - The extreme warmth of particular intervals of geologic history cannot be simulated with climate models, which are constrained by the geologic proxy record to relatively modest increases in atmospheric carbon dioxide levels. Recent recognition that biological productivity controls the abundance of cloud condensation nuclei (CCN) in the unpolluted atmosphere provides a solution to this problem. Our climate simulations show that reduced biological productivity (low CCN abundance) provides a substantial amplification of CO2-induced warming by reducing cloud lifetimes and reflectivity. If the stress of elevated temperatures did indeed suppress marine and terrestrial ecosystems during these times, this long-standing climate enigma may be solved. 10.1126/science.1153883 IS - 5873 JF - Science TI - Amplification of Cretaceous Warmth by Biological Cloud Feedbacks VL - 320 SP - 195 KW - ccn KW - climate KW - cloud KW - co2 KW - cretaceous KW - ecosystem KW - feedback KW - ocean KW - paleoclimate KW - productivity KW - terrestrial AU - Kump, Lee AU - Pollard, David PY - 2008/04/11/ UR - http://dx.doi.org/10.1126/science.1153883 ER -