气候变化领域集成服务门户(CCPortal): Lagrangian study of the final warming in the southern stratosphere during 2002: Part I. The vortex splitting at upper levels

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DOI	10.1007/s00382-019-04832-y
	Lagrangian study of the final warming in the southern stratosphere during 2002: Part I. The vortex splitting at upper levels
	Curbelo J.; Mechoso C.R.; Mancho A.M.; Wiggins S.
发表日期	2019
ISSN	0930-7575
起始页码	2779
结束页码	2792
卷号	53 期号:2020-05-06
英文摘要	The present two-part paper provides a Lagrangian perspective of the final southern warming in 2002, during which the stratospheric polar vortex (SPV) experienced a unique splitting. Part I focuses on the understanding of fundamental processes for filamentation and ultimately for vortex splitting on a selected isentropic surface in the middle stratosphere. Part II discusses the three-dimensional evolution of the selected sudden warming event. We approach the subject from a dynamical systems viewpoint and search for Lagrangian coherent structures using a Lagrangian descriptor as a tool. In this Part I we work in the idealized framework of a kinematic model that allows for an understanding of the contributing elements of the flow in late September during the splitting. We introduce a definition of kinematic SPV boundary based on a criterion for binning parcels inside and outside the vortex according to their values of the Lagrangian descriptor and associated PDF. This definition is justified by using arguments that go beyond heuristic considerations based on the potential vorticity. Next, we turn to the filamentation processes along this kinematic boundary, and the role of Lagrangian structures in the SPV splitting. We determine a criterion for splitting based on the structure of the evolving unstable and unstable manifolds. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Filamentation; Kinematic models; Stratospheric sudden warming; Vortex boundary; Vortex split
语种	英语
scopus关键词	kinematics; Lagrangian analysis; polar vortex; stratosphere; warming; Swinepox virus (STRAIN KASZA)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146011
作者单位	Departamento de Matemáticas, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain; Instituto de Ciencias Matemáticas, CSIC-UAM-UC3M-UCM, C/ Nicolás Cabrera 15, Campus de Cantoblanco UAM, Madrid, 28049, Spain; Department of Atmospheric and Oceanic Sciences, University of California Los Angeles, Los Angeles, CA, United States; School of Mathematics, University of Bristol, Bristol, BS8 1TW, United Kingdom
推荐引用方式 GB/T 7714	Curbelo J.,Mechoso C.R.,Mancho A.M.,et al. Lagrangian study of the final warming in the southern stratosphere during 2002: Part I. The vortex splitting at upper levels[J],2019,53(2020-05-06).
APA	Curbelo J.,Mechoso C.R.,Mancho A.M.,&Wiggins S..(2019).Lagrangian study of the final warming in the southern stratosphere during 2002: Part I. The vortex splitting at upper levels.Climate Dynamics,53(2020-05-06).
MLA	Curbelo J.,et al."Lagrangian study of the final warming in the southern stratosphere during 2002: Part I. The vortex splitting at upper levels".Climate Dynamics 53.2020-05-06(2019).