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DOI	10.1016/j.quaint.2024.01.001
	Revisiting the physical processes controlling the tropical atmospheric circulation changes during the Mid-Piacenzian Warm Period
	Zhang, Ke; Sun, Yong; Zhang, Zhongshi; Stepanek, Christian; Feng, Ran; Hill, Daniel; Lohmann, Gerrit; Dolan, Aisling; Haywood, Alan; Abe-Ouchi, Ayako; Otto-Bliesner, Bette; Contoux, Camille; Chandan, Deepak; Ramstein, Gilles; Dowsett, Harry; Tindall, Julia; Baatsen, Michiel; Tan, Ning; Peltier, William Richard; Li, Qiang; Chan, Wing -Le; Wang, Xin; Zhang, Xu
发表日期	2024
ISSN	1040-6182
EISSN	1873-4553
起始页码	682
卷号	682
英文摘要	The Mid-Piacenzian Warm Period (MPWP; 3.0-3.3 Ma), a warm geological period about three million years ago, has been deemed as a good past analog for understanding the current and future climate change. Based on 12 climate model outputs from Pliocene Model Intercomparison Project Phase 2 (PlioMIP2), we investigate tropical atmospheric circulation (TAC) changes under the warm MPWP and associated underlying mechanisms by diagnosing both atmospheric static stability and diabatic processes. Our findings underscore the advantage of analyzing atmospheric diabatic processes in elucidating seasonal variations of TAC compared to static stability assessments. Specifically, by diagnosing alterations in diabatic processes, we achieve a quantitative understanding and explanation the following TAC changes (incl. Strength and edge) during the MPWP: the weakened (annual, DJF, JJA) Northern Hemisphere and (DJF) Southern Hemisphere Hadley circulation (HC), reduced (annual, DJF) Pacific Walker circulation (PWC) and enhanced (annual, JJA) Southern Hemisphere HC and (JJA) PWC, and westward shifted (annual, DJF, JJA) PWC. We further addressed that the increasing bulk subtropical static stability and/or decreasing vertical shear of subtropical zonal wind - two crucial control factors for changes in subtropical baroclinicity - may promote HC widening, and vice versa. Consequently, our study of spatial diabatic heating and cooling, corresponding to upward and downward motions within the TAC, respectively, provides a new perspective for understanding the processes controlling seasonal TAC changes in response to surface warming.
英文关键词	Pliocene; PlioMIP2; Hadley circulation; Walker circulation; Diabatic heating/cooling; Subtropical baroclinicity
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001196570300001
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299007
作者单位	Lanzhou University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; China University of Geosciences; Bjerknes Centre for Climate Research; Norwegian Research Centre (NORCE); Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; University of Connecticut; University of Leeds; University of Bremen; University of Tokyo; National Center Atmospheric Research (NCAR) - USA; CEA; Centre National de la Recherche Scientifique (CNRS); Universite Paris Saclay; Universite Paris Cite; University of Toronto; United States Department of the Interior; United States Geological Survey; Utrecht University; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Stockholm University
推荐引用方式 GB/T 7714	Zhang, Ke,Sun, Yong,Zhang, Zhongshi,et al. Revisiting the physical processes controlling the tropical atmospheric circulation changes during the Mid-Piacenzian Warm Period[J]. 中国科学院青藏高原研究所,2024,682.
APA	Zhang, Ke.,Sun, Yong.,Zhang, Zhongshi.,Stepanek, Christian.,Feng, Ran.,...&Zhang, Xu.(2024).Revisiting the physical processes controlling the tropical atmospheric circulation changes during the Mid-Piacenzian Warm Period.QUATERNARY INTERNATIONAL,682.
MLA	Zhang, Ke,et al."Revisiting the physical processes controlling the tropical atmospheric circulation changes during the Mid-Piacenzian Warm Period".QUATERNARY INTERNATIONAL 682(2024).