摘要
The Indo-Pacific warm pool(IPWP) is crucial for regional and global climates. However, the development of the IPWP and its effect on the regional climate during the Cenozoic remain unclear. Here, using a compilation of sea surface temperature(SST) records(mainly since the middle Miocene) and multimodel paleoclimate simulations, our results indicated that the extent, intensity and warmest temperature position of the IPWP changed markedly during the Cenozoic. Specifically, its extent decreased, its intensity weakened, and its warmest temperature position shifted from the Indian to western Pacific Ocean over time. The atmospheric CO_(2) dominated its extent and intensity, while paleogeography, by restricting the distribution of the Indian Ocean and the width of the tropical seaways, controlled the shift in its warmest temperature position. In particular, the eastward shift to the western Pacific Ocean from the middle to late Miocene inferred from compiled SST records likely resulted from the constriction of tropical seaways. Furthermore, by changing the atmospheric thermal structure and atmospheric circulation,the reduced extent and intensity of the IPWP decreased the annual precipitation in the western Indian Ocean, eastern Asia and Australia, while the shift in the warmest temperature position from the Indian to western Pacific Ocean promoted aridification in Australia. Qualitative model-data agreements are obtained for both the IPWP SST and regional climate. From the perspective of past warm climates with high concentrations of atmospheric CO_(2), the expansion and strengthening of the IPWP will occur in a warmer future and favor excessive precipitation in eastern Asia and Australia.
作者
张冉
柳中晖
姜大膀
俞永强
张仲石
杨一博
谭宁
司东
张强
周鑫
Ran Zhang;Zhonghui Liu;Dabang Jiang;Yongqiang Yu;Zhongshi Zhang;Yibo Yang;Ning Tan;Dong Si;Qiang Zhang;Xin Zhou(Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD),Nanjing University of Information Science&Technology,Nanjing 210044,China;Department of Earth Sciences,The University of Hong Kong,Hong Kong 999077,China;Department of Atmospheric Science,School of Environmental Studies,China University of Geosciences,Wuhan 430074,China;State Key Laboratory of Tibetan Plateau Earth System Science,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China)
基金
supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB42000000)
the Second Tibetan Plateau Scientific Expedition and Research Program (2019QZKK0101)
the National Natural Science Foundation of China (42071113 and 42371166)。
