气候变化领域集成服务门户(CCPortal): Do Surface Temperature Indices Reflect Centennial-Timescale Trends in Atlantic Meridional Overturning Circulation Strength?

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DOI	10.1029/2020GL090888
	Do Surface Temperature Indices Reflect Centennial-Timescale Trends in Atlantic Meridional Overturning Circulation Strength?
	Little C.M.; Zhao M.; Buckley M.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	The difference between North Atlantic subpolar gyre sea surface temperatures (SPG SSTs) and hemispheric- or global-scale surface temperatures has been utilized as an index of centennial-timescale changes in Atlantic Meridional Overturning Circulation (AMOC) strength. Here, using Community Earth System Model ensembles, we show that surface temperature-based indices (STIs) proposed to date largely reflect global-scale temperature trends and thus do not reflect dynamical relationships with AMOC. More broadly, we find that relationships between STIs, SPG SSTs, and AMOC strength differ greatly in significance and magnitude over different time periods because they are dependent upon the nature of external forcing. In the twentieth century, characterized by offsetting greenhouse gas and aerosol forcing, the relationship between SSTs and AMOC strength varies widely and changes sign across a 20-member ensemble. We conclude that STIs and SPG SSTs are poor predictors of centennial-timescale AMOC strength variations. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric temperature; Greenhouse gases; Surface properties; Surface waters; Aerosol forcing; Atlantic meridional overturning circulations; Earth system model; External forcing; Sea surface temperature (SST); Surface temperatures; Temperature trends; Twentieth century; Oceanography; aerosol; climate modeling; meridional circulation; sea surface temperature; temperature gradient; trend analysis; Atlantic Ocean; Atlantic Ocean (North)
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/169475
作者单位	Atmospheric and Environmental Research, Inc., Lexington, MA, United States; Atmospheric, Oceanic & Earth Sciences Department, George Mason University, Fairfax, VA, United States
推荐引用方式 GB/T 7714	Little C.M.,Zhao M.,Buckley M.W.. Do Surface Temperature Indices Reflect Centennial-Timescale Trends in Atlantic Meridional Overturning Circulation Strength?[J],2020,47(22).
APA	Little C.M.,Zhao M.,&Buckley M.W..(2020).Do Surface Temperature Indices Reflect Centennial-Timescale Trends in Atlantic Meridional Overturning Circulation Strength?.Geophysical Research Letters,47(22).
MLA	Little C.M.,et al."Do Surface Temperature Indices Reflect Centennial-Timescale Trends in Atlantic Meridional Overturning Circulation Strength?".Geophysical Research Letters 47.22(2020).