气候变化领域集成服务门户(CCPortal): Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979-2020

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DOI	10.5194/acp-22-4187-2022
	Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979-2020
	Lecouffe, Audrey; Godin-Beekmann, Sophie; Pazmino, Andrea; Hauchecorne, Alain
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	4187
结束页码	4200
卷号	22 期号:6 页码:14
英文摘要	The intensity and position of the Southern Hemisphere stratospheric polar vortex edge is evaluated as a function of equivalent latitude over the period 1979-2020 on three isentropic levels (475, 550, and 675 K) from ECMWF ERA-Interim reanalysis. The study also includes an analysis of the onset and breakup dates of the polar vortex, which are determined from wind thresholds (e.g., 15.2, 20, and 25 m s(-1)) along the vortex edge. The vortex edge is stronger in late winter, during September-October-November, with the period of strongest intensity occurring later at the lowermost level. During the same period, we observe a lower variability of the edge position. A long-term increase in the vortex edge intensity and break-up date is observed during 1979-1999, linked to the increase in the ozone hole. A long-term decrease in the vortex onset date related to the 25 m s(-1) wind threshold is also observed at 475 K during this period. The solar cycle and to a lower extent the quasibiennial oscillation (QBO) and El Nino-Southern Oscillation (ENSO) modulate the interannual evolution of the strength of the vortex edge and the vortex breakup dates. A stronger vortex edge and longer vortex duration are observed in solar minimum (minSC) years, with the QBO and ENSO further modulating the solar cycle influence, especially at 475 and 550 K: during west QBO (wQBO) phases, the difference between vortex edge intensity for minSC and maxSC years is smaller than during east QBO (eQBO) phases. The polar vortex edge is stronger and lasts longer for maxSC/wQBO years than for maxSC/eQBO years. ENSO has a weaker impact but the vortex edge is somewhat stronger during cold ENSO phases for both minSC and maxSC years.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000776173200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273374
作者单位	Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Sorbonne Universite; Universite Paris Cite; Universite Paris Saclay
推荐引用方式 GB/T 7714	Lecouffe, Audrey,Godin-Beekmann, Sophie,Pazmino, Andrea,et al. Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979-2020[J],2022,22(6):14.
APA	Lecouffe, Audrey,Godin-Beekmann, Sophie,Pazmino, Andrea,&Hauchecorne, Alain.(2022).Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979-2020.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(6),14.
MLA	Lecouffe, Audrey,et al."Evolution of the intensity and duration of the Southern Hemisphere stratospheric polar vortex edge for the period 1979-2020".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.6(2022):14.