大气和海洋科学快报（英文版）2021，Vol.14Issue(2)：74-80,7.
2019-2020冬季北半球超强极涡事件
The exceptionally strong and persistent Arctic stratospheric polar vortex in the winter of 2019-2020
摘要
Abstract
The Arctic stratospheric polar vortex was exceptional strong,cold and persistent in the winter and spring of 2019-2020.Based on reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research and ozone observations from the Ozone Monitoring Instrument,the authors investi-gated the dynamical variation of the stratospheric polar vortex during winter 2019-2020 and its influence on surface weather and ozone depletion.This strong stratospheric polar vortex was affected by the less active upward propagation of planetary waves.The seasonal transition of the stratosphere during the stratospheric final warm-ing event in spring 2020 occurred late due to the persistence of the polar vortex.A positive Northern Annular Mode index propagated from the stratosphere to the surface,where it was consistent with the Arctic Oscilla-tion and North Atlantic Oscillation indices.As a result,the surface temperature in Eurasia and North America was generally warmer than the climatology.In some places of Eurasia,the surface temperature was about 10 K warmer during the period from January to February 2020.The most serious Arctic ozone depletion since 2004 has been observed since February 2020.The mean total column ozone within 60°-90°N from March to 15 April was about 80 DU less than the climatology.关键词
北极平流层极涡/暖冬/臭氧低值Key words
Arctic stratospheric polar vortex/Warm winter/Ozone depletion引用本文复制引用
Yuli Zhang,Zhaonan Cai,Yi Liu..2019-2020冬季北半球超强极涡事件[J].大气和海洋科学快报（英文版）,2021,14(2):74-80,7.基金项目
This research was supported by the Key Laboratory of Middle At-mosphere and Global Environment Observation[grant number LAGEO-2019-01]. （）
