气候变化领域集成服务门户(CCPortal): Elucidating the Mechanisms Responsible for Hadley Cell Weakening Under 4 × CO2 Forcing

CCPortal

DOI	10.1029/2020GL090348
	Elucidating the Mechanisms Responsible for Hadley Cell Weakening Under 4 × CO2 Forcing
	Chemke R.; Polvani L.M.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	The projected weakening of the Northern Hemisphere Hadley cell will have large climatic impacts at low latitudes. Several mechanisms have been proposed to explain this weakening. In order to isolate and assess their relative importance, we here use the abrupt 4 × CO2 experiment of the Coupled Model Intercomparison Project phase 5, as this forcing separates the different mechanisms which respond on different time scales. We find that the Hadley circulation responds relatively quickly to quadrupling CO2 concentrations, reaching its steady-state value after less than a decade. This fast response demonstrates that the weakening could not be solely due to the much slower increase in surface temperature. In addition, we show that the Hadley cell's weakening results from a combination of an increase in tropical static stability, partially offset by an increase in the latitudinal gradient of latent heating. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Carbon dioxide; Coupled Model Intercomparison Project; Different mechanisms; Different time scale; Hadley circulation; Latitudinal gradients; Northern Hemispheres; Steady-state values; Surface temperatures; Clouds
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169150
作者单位	Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Chemke R.,Polvani L.M.. Elucidating the Mechanisms Responsible for Hadley Cell Weakening Under 4 × CO2 Forcing[J],2021,48(3).
APA	Chemke R.,&Polvani L.M..(2021).Elucidating the Mechanisms Responsible for Hadley Cell Weakening Under 4 × CO2 Forcing.Geophysical Research Letters,48(3).
MLA	Chemke R.,et al."Elucidating the Mechanisms Responsible for Hadley Cell Weakening Under 4 × CO2 Forcing".Geophysical Research Letters 48.3(2021).