气候变化领域集成服务门户(CCPortal): Drivers of the Northern Extratropical Eddy-Driven Jet Change in CMIP5 and CMIP6 Models

CCPortal

DOI	10.1029/2019GL086695
	Drivers of the Northern Extratropical Eddy-Driven Jet Change in CMIP5 and CMIP6 Models
	Oudar T.; Cattiaux J.; Douville H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:8
英文摘要	The wintertime midlatitude atmospheric circulation is evaluated in CMIP6 models. The biases have been reduced since CMIP5 although the low-level flow is still too zonal. CMIP5 and CMIP6 projections of 850 hPa zonal wind are then analyzed and are consistent under the RCP8.5 and the SSP5–8.5 scenarios, respectively. A poleward shift is identified in the Pacific, while a tripole structure is found in the North Atlantic: The zonal wind strengthens over Western Europe and decreases north and south. A multiple linear regression allows us to quantify the contribution of different drivers to the intermodel spread in zonal wind projections. It supports the importance of projected tropical warming and changes in the stratospheric vortex but also suggests a contribution of the asymmetry in the projected surface warming of the equatorial Pacific and of the present-day biases in the eddy-driven jet position. The North Atlantic warming hole plays a weaker role. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Linear regression; Atmospheric circulation; Equatorial Pacific; Multiple linear regressions; North Atlantic; Poleward shift; Stratospheric vortex; Surface warming; Western Europe; Climate models; asymmetry; atmospheric circulation; climate modeling; CMIP; eddy covariance; extratropical environment; global warming; jet; midlatitude environment; zonal wind; Atlantic Ocean; Atlantic Ocean (North); Western Europe
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/170456
作者单位	CNRM, Université de Toulouse, Météo France, CNRS, Toulouse, France
推荐引用方式 GB/T 7714	Oudar T.,Cattiaux J.,Douville H.. Drivers of the Northern Extratropical Eddy-Driven Jet Change in CMIP5 and CMIP6 Models[J],2020,47(8).
APA	Oudar T.,Cattiaux J.,&Douville H..(2020).Drivers of the Northern Extratropical Eddy-Driven Jet Change in CMIP5 and CMIP6 Models.Geophysical Research Letters,47(8).
MLA	Oudar T.,et al."Drivers of the Northern Extratropical Eddy-Driven Jet Change in CMIP5 and CMIP6 Models".Geophysical Research Letters 47.8(2020).