Coupling of CO2 and Ice Sheet Stability Over Major Climate Transitions of the Last 20 Million Years Export

@article{citeulike:5971564, abstract = {The CO2 content of the atmosphere has varied cyclically between \~{}180 and \~{}280 ppmv over the last 800,000 years, closely coupled with temperature and sea level. For earlier periods in Earth's history, pCO2 is much less certain and the relationship between pCO2 and climate remains poorly constrained. We use boron/calcium ratios in foraminifera to estimate pCO2 during major climate transitions of the last 20 million years (myr). During the Middle Miocene, when temperatures were \~{}3 to 6{degrees}C warmer and sea level 25 to 40 meters higher than present, pCO2 was similar to modern levels. Decreases in pCO2 were synchronous with major episodes of glacial expansion during the Middle Miocene (\~{}14 to 10 million years ago; Ma) and Late Pliocene (\~{}3.3 to -2.4 Ma). 10.1126/science.1178296}, author = {Tripati, Aradhna K. and Roberts, Christopher D. and Eagle, Robert A.}, booktitle = {Science}, citeulike-article-id = {5971564}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1178296}, citeulike-linkout-1 = {http://www.sciencemag.org/content/1178296/.abstract}, citeulike-linkout-2 = {http://www.sciencemag.org/content/1178296/.full.pdf}, citeulike-linkout-3 = {http://www.sciencemag.org/cgi/content/abstract/326/5958/1394}, citeulike-linkout-4 = {http://view.ncbi.nlm.nih.gov/pubmed/19815724}, citeulike-linkout-5 = {http://www.hubmed.org/display.cgi?uids=19815724}, day = {8}, doi = {10.1126/science.1178296}, journal = {Science}, keywords = {boron, calcium, cenozoic, climate, co2, correlation, ice, miocene, observations, paleoclimate, pliocene, proxy, temperature}, month = {October}, number = {5958}, pages = {1178296--1397}, posted-at = {2009-10-19 16:44:35}, priority = {2}, title = {Coupling of CO2 and Ice Sheet Stability Over Major Climate Transitions of the Last 20 Million Years}, url = {http://dx.doi.org/10.1126/science.1178296}, volume = {326}, year = {2009} }

TY - JOUR ID - citeulike:5971564 L3 - citeulike-article-id:5971564 N2 - The CO2 content of the atmosphere has varied cyclically between ~180 and ~280 ppmv over the last 800,000 years, closely coupled with temperature and sea level. For earlier periods in Earth's history, pCO2 is much less certain and the relationship between pCO2 and climate remains poorly constrained. We use boron/calcium ratios in foraminifera to estimate pCO2 during major climate transitions of the last 20 million years (myr). During the Middle Miocene, when temperatures were ~3 to 6{degrees}C warmer and sea level 25 to 40 meters higher than present, pCO2 was similar to modern levels. Decreases in pCO2 were synchronous with major episodes of glacial expansion during the Middle Miocene (~14 to 10 million years ago; Ma) and Late Pliocene (~3.3 to -2.4 Ma). 10.1126/science.1178296 IS - 5958 JF - Science EP - 1397 TI - Coupling of CO2 and Ice Sheet Stability Over Major Climate Transitions of the Last 20 Million Years VL - 326 T2 - Science SP - 1178296 KW - boron KW - calcium KW - cenozoic KW - climate KW - co2 KW - correlation KW - ice KW - miocene KW - observations KW - paleoclimate KW - pliocene KW - proxy KW - temperature AU - Tripati, Aradhna AU - Roberts, Christopher AU - Eagle, Robert PY - 2009/10/08/ UR - http://dx.doi.org/10.1126/science.1178296 ER -