气候变化领域集成服务门户(CCPortal): Twenty-First Century Trends in Mixing Barriers and Eddy Transport in the Lower Stratosphere

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DOI	10.1029/2020GL089548
	Twenty-First Century Trends in Mixing Barriers and Eddy Transport in the Lower Stratosphere
	Abalos M.; de la Cámara A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Future trends in isentropic mixing in the lower stratosphere remain largely unexplored, in contrast with other aspects of stratospheric tracer transport. This study examines trends in effective diffusivity (κeff), a measure of the potential of the flow to produce isentropic mixing, in recent chemistry-climate model simulations. The results highlight substantial reduction of κeff in the upper flanks of the subtropical jets from fall to spring, which are strengthened in response to greenhouse gas increases. This contrasts with stronger eddy transport, associated with increased wave drag in the region, peaking in summer near the critical lines. The key role of changes in tracer meridional gradients in addition to transport barriers for isentropic mixing trends is evidenced. The projected ozone recovery leads to enhanced κeff in polar austral spring and summer, associated with a weaker and shorter-lived austral polar vortex by the end of the 21st century. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate models; Greenhouse gases; Tracers; Chemistry-climate models; Effective diffusivities; Lower stratosphere; Meridional gradients; Stratospheric tracers; Substantial reduction; Subtropical jet; Transport barrier; Mixing; atmospheric transport; climate modeling; eddy; future prospect; greenhouse gas; meridional circulation; mixing; polar vortex; stratosphere; tracer; trend analysis; twenty first century
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/169529
作者单位	Department of Earth Physics and Astrophysics, Universidad Complutense de Madrid, Madrid, Spain
推荐引用方式 GB/T 7714	Abalos M.,de la Cámara A.. Twenty-First Century Trends in Mixing Barriers and Eddy Transport in the Lower Stratosphere[J],2020,47(21).
APA	Abalos M.,&de la Cámara A..(2020).Twenty-First Century Trends in Mixing Barriers and Eddy Transport in the Lower Stratosphere.Geophysical Research Letters,47(21).
MLA	Abalos M.,et al."Twenty-First Century Trends in Mixing Barriers and Eddy Transport in the Lower Stratosphere".Geophysical Research Letters 47.21(2020).