西风带
干旱
全球降温
气候学
气候变化
黄土
中纬度
环境科学
生物地球化学循环
气候模式
地质学
大气科学
海洋学
生态学
古生物学
地貌学
生物
作者
Xiaomin Fang,Zhisheng An,Steven C. Clemens,Jinbo Zan,Zhengguo Shi,Shengli Yang,Wenxia Han
标识
DOI:10.1073/pnas.1922710117
摘要
Significance We recovered the world’s thickest continuous loess record from the southern margin of the Taklimakan desert, a global-scale dust source area. The continuous high-resolution grain size and flux records of dust emission, reflecting histories of aridity and westerlies climate, indicate an extant dry climate, desert area, and stable land surface supporting continuous loess deposition at least since ∼3.6 Ma, and that global cooling, rather than Tibet uplift, modulated the histories of aridity and westerlies climate changes in inland Asia since ∼3.6 Ma. Moreover, our study may suggest potential positive linkages and feedback among dust emission, marine biogeochemical activity, atmospheric CO 2 , and global cooling, which might provide insights into dynamics of Earth’s climate system and improve predictions for the future.
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