GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-18-0223.1
Type Classification of Sudden Stratospheric Warming Based on Pre- and Postwarming Periods
Choi, Hyesun1,2; Kim, Baek-Min2,3; Choi, Wookap1
2019-04-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2019
卷号32期号:8页码:2349-2367
文章类型Article
语种英语
国家South Korea
英文摘要

In existing literature, sudden stratospheric warming (SSW) events have been typically defined as displacement or split types. Detailed reexamination of SSW evolution has revealed that an SSW event often alters its type before and after the central day of the warming event. On the basis of this observation, we objectively define three types of SSW using wave amplitude: displacement-displacement (DD) type, displacement-split (DS) type, and split-split (SS) type. The geopotential height (GPH) amplitude of zonal wavenumbers 1 and 2 averaged over 55 degrees-65 degrees N at 10 hPa was used as a criterion for the classification. If the amplitude of zonal wavenumber 1 is larger (smaller) than that of wavenumber 2 before and after the central day of SSW, the event is regarded as a DD (SS) type. If the amplitude of zonal wavenumber 1 is larger than that of wavenumber 2 before the central day but is smaller after that day, the event is regarded as a DS type. The above classification algorithm has been applied to both reanalysis data and model results. We observe that conventional split-type SSW events identified by previous studies can be categorized as either DS- or SS-type events, each type of which exhibits different evolution characteristics. In particular, they are distinctively different during the prewarming period. In the SS type, the characteristics of the conventional split type are more obvious, and the features that differ from those of the DD type are the most robust. The model results generally resemble the reanalysis data, particularly in the DD cases.


英文关键词Atmosphere Arctic Waves atmospheric Stratosphere-troposphere coupling Stratosphere
领域气候变化
收录类别SCI-E
WOS记录号WOS:000463599100003
WOS关键词POLAR VORTEX ; PLANETARY ; WEATHER
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/182148
专题气候变化
作者单位1.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea;
2.Korea Polar Res Inst, Incheon, South Korea;
3.Pukyong Natl Univ, Dept Environm Atmospher Sci, Pusan, South Korea
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GB/T 7714
Choi, Hyesun,Kim, Baek-Min,Choi, Wookap. Type Classification of Sudden Stratospheric Warming Based on Pre- and Postwarming Periods[J]. JOURNAL OF CLIMATE,2019,32(8):2349-2367.
APA Choi, Hyesun,Kim, Baek-Min,&Choi, Wookap.(2019).Type Classification of Sudden Stratospheric Warming Based on Pre- and Postwarming Periods.JOURNAL OF CLIMATE,32(8),2349-2367.
MLA Choi, Hyesun,et al."Type Classification of Sudden Stratospheric Warming Based on Pre- and Postwarming Periods".JOURNAL OF CLIMATE 32.8(2019):2349-2367.
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