Transient Middle Eocene Atmospheric CO2 and Temperature Variations
Transient Middle Eocene Atmospheric CO2 and Temperature Variations
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DOI：
10.1126/science.1193654
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发表时间：
2010-11-05
期刊：
影响因子：
56.9
通讯作者：
Brinkhuis, Henk
中科院分区：
文献类型：
--
作者：
Bijl, Peter K.;Houben, Alexander J. P.;Brinkhuis, Henk
始新世的长期温暖（类似于5600万至3400万年前）通常与大气二氧化碳分压（pCO（2））升高有关。然而，两者之间的直接关系尚未建立短期气候扰动。我们重建了pCO（2）和温度在短暂的全球变暖事件中的变化，称为中始新世气候适宜期（MECO;类似于4000万年前）。有机分子古温度测量表明，西南太平洋海面温度（SST）上升了3至6摄氏度。pCO（2）的重建表明伴随着2至3倍的增加。MECO期间SST和pCO（2）趋势之间的显著一致性表明，在MECO期间，pCO（2）升高在全球变暖中发挥了重要作用。
The long-term warmth of the Eocene (similar to 56 to 34 million years ago) is commonly associated with elevated partial pressure of atmospheric carbon dioxide (pCO(2)). However, a direct relationship between the two has not been established for short-term climate perturbations. We reconstructed changes in both pCO(2) and temperature over an episode of transient global warming called the Middle Eocene Climatic Optimum (MECO; similar to 40 million years ago). Organic molecular paleothermometry indicates a warming of southwest Pacific sea surface temperatures (SSTs) by 3 to 6 degrees C. Reconstructions of pCO(2) indicate a concomitant increase by a factor of 2 to 3. The marked consistency between SST and pCO(2) trends during the MECO suggests that elevated pCO(2) played a major role in global warming during the MECO.