气候变化领域集成服务门户(CCPortal): The influence of zonally asymmetric stratospheric ozone changes on the arctic polar vortex shift

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DOI	10.1175/JCLI-D-19-0647.1
	The influence of zonally asymmetric stratospheric ozone changes on the arctic polar vortex shift
	Zhang J.; Tian W.; Xie F.; Pyle J.A.; Keeble J.; Wang T.
发表日期	2020
ISSN	0894-8755
起始页码	4641
结束页码	4658
卷号	33 期号:11
英文摘要	Recent studies have found a shift of the Arctic stratospheric polar vortex toward Siberia during late winter since 1980, intensifying the zonally asymmetric ozone (ZAO) depletion in the northern middle and high latitudes with a stronger total column ozone decline over Siberia compared with that above other regions at the same latitudes. Using observations and a climate model, this study shows that zonally asymmetric stratospheric ozone depletion gives a significant feedback on the position of the polar vortex and further favors the stratospheric polar vortex shift toward Siberia in February for the period 1980-99. The polar vortex shift is not significant in the experiment forced by zonal mean ozone fields. The February ZAO trend with a stronger ozone decline over Siberia causes a lower temperature over this region than over the other regions at the same latitudes, due to shortwave radiative cooling and dynamical cooling. The combined cooling effects induce an anomalous cyclonic flow over Siberia, corresponding to the polar vortex shift toward Siberia. In addition, the ZAO depletion also increases the meridional gradient of potential vorticity over Siberia, which is favorable for the upward propagation of planetary wave fluxes from the troposphere over this region. Increased horizontal divergence of planetary waves fluxes over the region 608-758N, 608-908E associated with ZAO changes accelerates the high-latitude zonal westerlies in the middle stratosphere, further enhancing the shift of the stratospheric polar vortex toward Siberia. After 2000, the ZAO trend in February is weaker and induces a smaller polar vortex shift than that in the period 1980-99. © 2020 American Meteorological Society.
英文关键词	Climate models; Ozone; Ozone layer; Radiative Cooling; Combined cooling; Lower temperatures; Meridional gradients; Potential vorticity; Stratospheric ozone; Stratospheric ozone depletion; Stratospheric polar vortex; Total column ozone; Vortex flow; climate modeling; column; ozone depletion; planetary wave; polar vortex; potential vorticity; shortwave radiation; stratosphere; troposphere; westerly; Siberia
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171281
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Department of Chemistry, National Centre for Atmospheric Science, University of Cambridge, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Zhang J.,Tian W.,Xie F.,et al. The influence of zonally asymmetric stratospheric ozone changes on the arctic polar vortex shift[J],2020,33(11).
APA	Zhang J.,Tian W.,Xie F.,Pyle J.A.,Keeble J.,&Wang T..(2020).The influence of zonally asymmetric stratospheric ozone changes on the arctic polar vortex shift.Journal of Climate,33(11).
MLA	Zhang J.,et al."The influence of zonally asymmetric stratospheric ozone changes on the arctic polar vortex shift".Journal of Climate 33.11(2020).