气候变化领域集成服务门户(CCPortal): Role of AMOC in Transient Climate Response to Greenhouse Gas Forcing in Two Coupled Models

CCPortal

DOI	10.1175/JCLI-D-19-1027.1
	Role of AMOC in Transient Climate Response to Greenhouse Gas Forcing in Two Coupled Models
	Hu A.; Van Roekel L.; Weijer W.; Garuba O.A.; Cheng W.; Nadiga B.T.
发表日期	2020
ISSN	0894-8755
起始页码	5845
结束页码	5859
卷号	33 期号:14
英文摘要	As the greenhouse gas concentrations increase, a warmer climate is expected. However, numerous internal climate processes can modulate the primary radiative warming response of the climate system to rising greenhouse gas forcing. Here the particular internal climate process that we focus on is the Atlantic meridional overturning circulation (AMOC), an important global-scale feature of ocean circulation that serves to transport heat and other scalars, and we address the question of how the mean strength of AMOC can modulate the transient climate response. While the Community Earth System Model version 2 (CESM2) and the Energy Exascale Earth System Model version 1 (E3SM1) have very similar equilibrium/effective climate sensitivity, our analysis suggests that a weaker AMOC contributes in part to the higher transient climate response to a rising greenhouse gas forcing seen in E3SM1 by permitting a faster warming of the upper ocean and a concomitant slower warming of the subsurface ocean. Likewise the stronger AMOC in CESM2 by permitting a slower warming of the upper ocean leads in part to a smaller transient climate response. Thus, while the mean strength of AMOC does not affect the equilibrium/effective climate sensitivity, it is likely to play an important role in determining the transient climate response on the centennial time scale. © 2020 American Meteorological Society. All rights reserved.
英文关键词	Earth (planet); Greenhouse gases; Oceanography; Transient analysis; Atlantic meridional overturning circulations; Climate sensitivity; Earth system model; Gas concentration; Greenhouse-gas forcing; Ocean circulation; Radiative warming; Sub-surface ocean; Climate models; climate modeling; concentration (composition); greenhouse gas; heat transfer; meridional circulation; oceanic circulation; radiative forcing; temporal variation; Atlantic Ocean
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171220
作者单位	National Center for Atmospheric Research, Boulder, CO, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington and NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, United States
推荐引用方式 GB/T 7714	Hu A.,Van Roekel L.,Weijer W.,et al. Role of AMOC in Transient Climate Response to Greenhouse Gas Forcing in Two Coupled Models[J],2020,33(14).
APA	Hu A.,Van Roekel L.,Weijer W.,Garuba O.A.,Cheng W.,&Nadiga B.T..(2020).Role of AMOC in Transient Climate Response to Greenhouse Gas Forcing in Two Coupled Models.Journal of Climate,33(14).
MLA	Hu A.,et al."Role of AMOC in Transient Climate Response to Greenhouse Gas Forcing in Two Coupled Models".Journal of Climate 33.14(2020).