Spatial change of precipitation in response to the Paleocene-Eocene thermal Maximum warming in China
Spatial change of precipitation in response to the Paleocene-Eocene thermal Maximum warming in China
复制标题
中国古新世-始新世热极增温对降水空间变化的响应
DOI：
10.1016/j.gloplacha.2020.103313
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发表时间：
2020-11-01
影响因子：
3.9
通讯作者：
Ding, Zhongli
中科院分区：
文献类型：
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作者：
Chen, Zuoling;Dong, Xinxin;Ding, Zhongli
古新世-始新世热极大期（PETM）是一个短暂的温室气候间隔，与类似于5600万年前的海洋-大气系统的大量碳释放有关，为快速全球变暖对区域水文气候的影响提供了地质案例研究。在这里，我们重建了中国抚顺和南阳盆地古近系C3植物的碳同位素分辨率（Delta）。在古新统期间，两个地点的Delta值都有显著的增加，但抚顺盆地的幅度更大，这可以解释为对区域降水的响应。基于Delta值的年平均降水量的定量估计表明，东亚大陆总体上变得更加湿润，相对更多的降水发生在高纬度地区，以响应PETM变暖。我们的研究结果支持了这样的预测，即持续的人为变暖将导致东亚地区的气候更加湿润，高纬度地区的降水相对较多。
The Paleocene-Eocene Thermal Maximum (PETM), a transient greenhouse climate interval associated with a huge release of carbon to the ocean-atmosphere system similar to 56 million years ago, provides a geological case study for the effect of rapid global warming on regional hydroclimate. Here we reconstruct carbon isotope discrimination (Delta) of C-3 plants across the PETM in the Fushun and Nanyang Basins of China. The Delta values present remarkable increase at both sites but with greater magnitude in the Fushun Basin during the PETM, which is explained as a response to regional precipitation. Quantitative estimate of mean annual precipitation based on the Delta values suggests that East Asian continent generally became wetter with relatively more precipitation occurring at higher latitudes in response to the PETM warming. Our results support the prediction that continuous anthropogenic warming will lead to a wetter climate in East Asia with relatively more precipitation in higher-latitude lands.