首页|Cenozoic Indo-Pacific warm pool controlled by both atmospheric CO2 and paleogeography

Cenozoic Indo-Pacific warm pool controlled by both atmospheric CO2 and paleogeography

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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 com-pilation 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 posi-tion 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 CO2 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 trop-ical 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 CO2,the expansion and strengthening of the IPWP will occur in a warmer future and favor excessive precipitation in eastern Asia and Australia.

Indo-Pacific warm poolCenozoicAtmospheric CO2Paleogeography

Ran Zhang、Zhonghui Liu、Dabang Jiang、Yongqiang Yu、Zhongshi Zhang、Yibo Yang、Ning Tan、Dong Si、Qiang Zhang、Xin Zhou

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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,Nanjing210044,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

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中国科学院战略规划重点项目Second Tibetan Plateau Scientific Expedition and Research Program(STEP)国家自然科学基金国家自然科学基金

XDB420000002019QZKK01014207111342371166

2024

10.1016/j.scib.2024.02.028

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(9)
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