IMHE OpenIR  > 山地灾害与地表过程重点实验室
Indications of stratospheric anomalies in the freezing rain and snow disaster in South China, 2008
Chen QuanLiang1,2; Li Zhan1; Fan GuangZhou1; Zhu KeYun1; Zhang Wen1; Zhu HongQin1
Corresponding AuthorChen, QL
2011
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
EISSN1869-1897
Volume54Issue:8Pages:1248-1256
SubtypeArticle
AbstractNCEP/NCAR reanalysis data were used to characterize stratospheric temperature and water-vapor anomalies before and after the freezing rain and snow disaster of South China in 2008, and the influence of stratospheric circulation anomalies on the troposphere. Stratospheric temperature and water-vapor anomalies provided good leading indicators of this weather event. The period from December 1st 2007 to February 28th 2008 was divided into 18 pentads. During the 6th pentad, temperature decreased significantly at 10 hPa in the near-polar stratospheric region, and the decreasing trend strengthened and extended downward and southward to middle and lower latitudes. During the 14th-18th pentads, the temperature decrease reached its maximum and extended to 30A degrees N. This coincided with the widespread freezing rain and snow event. By the end of January 2008, the temperature decrease ended in the near-polar stratospheric region, but continued in the mid-latitude area of the troposphere as the freezing rain and snow weather persisted. Similar to the temperature variations, positive anomalies of relative humidity in the stratospheric near-polar region also strengthened and extended downward and southward, coinciding with the freezing rain and snow event. Along with the significant relationship between the freezing rain and snow disaster and stratospheric circulation anomalies, the stratospheric polar vortex changed its shape in late December, intensifying and spreading downward from the top of the stratosphere and southward to the Asian continent, resulting in a deepening of the East Asian Trough and a strengthening of meridional circulation. Before the occurrence of the freezing rain and snow event, temperature and vapor increases in the stratosphere transferred downward to the troposphere, along with a stratospheric flow in the near-polar region southward to lower latitudes.
KeywordFreezing Rain And Snow Disasters Stratosphere Air Temperature Moisture Circulation Anomaly
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11430-011-4192-3
WOS Subject ExtendedGeology
Indexed BySCI
WOS KeywordARCTIC OSCILLATION ; CLIMATE-CHANGE ; TROPOSPHERE
Language英语
Quartile4区
TOP
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000293707400015
Funding OrganizationNational Natural Science Foundation of China(41005021 ; Scientific Research Foundation of CUIT(CSRF20102) ; Special Fund for Public Welfare Industry (meteorology)(GYHY (QX)2007-6-37) ; 40830955)
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5494
Collection山地灾害与地表过程重点实验室
Affiliation1.Chengdu Univ Informat Technol, Coll Atmospher Sci, Plateau Atmospher & Environm Key Lab Sichuan Prov, Chengdu 610225, Peoples R China
2.CAS, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Chen QuanLiang,Li Zhan,Fan GuangZhou,et al. Indications of stratospheric anomalies in the freezing rain and snow disaster in South China, 2008[J]. SCIENCE CHINA-EARTH SCIENCES,2011,54(8):1248-1256.
APA Chen QuanLiang,Li Zhan,Fan GuangZhou,Zhu KeYun,Zhang Wen,&Zhu HongQin.(2011).Indications of stratospheric anomalies in the freezing rain and snow disaster in South China, 2008.SCIENCE CHINA-EARTH SCIENCES,54(8),1248-1256.
MLA Chen QuanLiang,et al."Indications of stratospheric anomalies in the freezing rain and snow disaster in South China, 2008".SCIENCE CHINA-EARTH SCIENCES 54.8(2011):1248-1256.
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