气候变化领域集成服务门户(CCPortal): The Role of Coupled Feedbacks in the Decadal Variability of the Southern Hemisphere Eddy-Driven Jet

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DOI	10.1029/2021JD035023
	The Role of Coupled Feedbacks in the Decadal Variability of the Southern Hemisphere Eddy-Driven Jet
	Yang D.; Arblaster J.M.; Meehl G.A.; England M.H.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:20
英文摘要	Recent work has suggested that tropical Pacific decadal variability and external forcings have had a comparable influence on the observed changes in the Southern Hemisphere summertime eddy-driven jet over the satellite era. Here we contrast the zonally asymmetric response of the Southern Hemisphere eddy-driven jet to tropical Pacific decadal variability by designing an atmosphere-only PAC-A experiment using the Community Atmosphere Model version 5 (CAM5) and comparing it with the fully coupled Community Earth System Model Version 1 (CESM1) tropical Pacific pacemaker (PAC-C) experiments. In both frameworks, the tropical Pacific sea surface temperature (SST) anomalies are identical (model climatology plus observed anomalies), which allows the PAC-C and PAC-A experiments to be used to estimate the impact of coupling on teleconnections from the tropical Pacific to the Southern Hemisphere extratropics. The observed summertime South Pacific jet intensification is reproduced in both coupled and uncoupled experiments, indicating that the central and eastern tropical Pacific (hereafter, tropical Pacific) SST impacts the South Pacific jet mainly via direct atmospheric teleconnections. By contrast, only the coupled PAC-C captures the summertime poleward shift of the South Atlantic-Indian jet, suggesting that air-sea coupling is essential in driving the teleconnections between tropical Pacific SST anomalies and South Atlantic-Indian jet variations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	CESM pacemaker; coupling; eddy-driven jet; Rossby wave; zonal asymmetric
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236943
作者单位	ARC Centre of Excellence for Climate Extremes, Monash University, Melbourne, VIC, Australia; National Center for Atmospheric Research, Boulder, CO, United States; ARC Centre of Excellence for Climate Extremes, Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Yang D.,Arblaster J.M.,Meehl G.A.,et al. The Role of Coupled Feedbacks in the Decadal Variability of the Southern Hemisphere Eddy-Driven Jet[J],2021,126(20).
APA	Yang D.,Arblaster J.M.,Meehl G.A.,&England M.H..(2021).The Role of Coupled Feedbacks in the Decadal Variability of the Southern Hemisphere Eddy-Driven Jet.Journal of Geophysical Research: Atmospheres,126(20).
MLA	Yang D.,et al."The Role of Coupled Feedbacks in the Decadal Variability of the Southern Hemisphere Eddy-Driven Jet".Journal of Geophysical Research: Atmospheres 126.20(2021).