气候变化领域集成服务门户(CCPortal): Vertical Structure of the Arctic Spring Transition in the Middle Atmosphere

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DOI	10.1029/2020JD034353
	Vertical Structure of the Arctic Spring Transition in the Middle Atmosphere
	Matthias V.; Stober G.; Kozlovsky A.; Lester M.; Belova E.; Kero J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:10
英文摘要	In the middle atmosphere, spring transition is the time period where the zonal circulation reverses from winter westerly to summer easterly which has a strong impact on the vertical wave propagation influencing the ionospheric variability. The spring transition can be rapid in form of a final sudden stratospheric warming (SSW, mainly dynamically driven) or slow (mainly radiatively driven) but also intermediate stages can occur. In most studies spring transitions are classified either by their timing of occurrence or by their vertical structure. However, all these studies focus exclusively on the stratosphere and it is not clear if and how pre-winter conditions have an impact on when and how spring transitions take place. Here we classify the spring transitions regarding their vertical-temporal development beginning in January and spanning the whole middle atmosphere in the core region of the polar vortex. This leads to five classes where the timing of the SSW in the preceding winter and a downward propagating Northern Annular Mode plays a crucial role. First, we use Microwave Limb Sounder satellite data to describe the five classes for recent single years, and then we use Modern-Era Retrospective analysis for Research and Applications Version 2 reanalysis data for a composite analysis. The results show distinctive differences between the five classes in the months before the spring transition especially in the mesosphere. We hypothesize that this will help to improve the prediction of the spring transition. Additionally, meteor radar winds are used to link spring transition effects in the upper mesosphere and lower thermosphere with the stratospheric final warming. © 2021. The Authors.
英文关键词	middle atmosphere; new classification; spring transition
语种	英语
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/185197
作者单位	Deutsches Zentrum für Luft- und Raumfahrt, Institut fr̈ Solar-Terrestrische Physik, Neustrelitz, Germany; Institute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, University of Bern, Bern, Switzerland; Sodankylä Geophysical Observatory of the University of Oulu, Sodankylä, Finland; University of Leicester, Leicester, United Kingdom; Swedish Institute of Space Physics, Kiruna, Sweden
推荐引用方式 GB/T 7714	Matthias V.,Stober G.,Kozlovsky A.,et al. Vertical Structure of the Arctic Spring Transition in the Middle Atmosphere[J],2021,126(10).
APA	Matthias V.,Stober G.,Kozlovsky A.,Lester M.,Belova E.,&Kero J..(2021).Vertical Structure of the Arctic Spring Transition in the Middle Atmosphere.Journal of Geophysical Research: Atmospheres,126(10).
MLA	Matthias V.,et al."Vertical Structure of the Arctic Spring Transition in the Middle Atmosphere".Journal of Geophysical Research: Atmospheres 126.10(2021).