GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-18-0545.1
Impacts of MJO Convection over the Maritime Continent on Eastern China Cold Temperatures
Song, Lei1; Wu, Renguang1,2
2019-06-01
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2019
卷号32期号:12页码:3429-3449
文章类型Article
语种英语
国家Peoples R China
英文摘要

The present study shows that winter cold events over eastern China can be induced by Madden-Julian oscillation (MJO)-associated anomalous convection over the Maritime Continent. We conduct composite analysis separately for identified intraseasonal cold events over eastern China that occur following anomalous convection over the Maritime Continent and the tropical Indian Ocean. For cold events related to anomalous convection over the Maritime Continent, the southward intrusion of cold air into eastern China takes an eastward path in association with an eastward location of an anomalous Siberian high compared to cold events related to anomalous convection over the tropical Indian Ocean. The Maritime Continent convection-related cold events tend to occur with a negative Arctic Oscillation (AO), whereas the relationship between the tropical Indian Ocean convection-related cold events and the AO is weak. Anomalous convective heating over the Maritime Continent triggers a poleward Rossby wave train, which, together with an AO-related southward wave train from northern Eurasia, contributes to the deepening of the East Asian trough. The poleward wave energy dispersion is similarly triggered by anomalous convective heating over the tropical Indian Ocean. In both types of cold events, anomalous tropical heating induces a meridional vertical circulation, with large-scale airmass convergence in the upper midtroposphere and descending of air on the northern branch of the vertical cell over Siberia. The upper-level mass convergence and the radiative cooling over Siberia work together for the enhancement and southeastward expansion of the Siberian high and the southward intrusion of cold anomalies to eastern China.


英文关键词Asia Maritime Continent Cold air surges Madden-Julian oscillation Vertical motion Intraseasonal variability
领域气候变化
收录类别SCI-E
WOS记录号WOS:000468467200001
WOS关键词MADDEN-JULIAN OSCILLATION ; ASIAN WINTER MONSOON ; INTRASEASONAL AMPLIFICATION ; ARCTIC OSCILLATION ; CIRCULATION ; ANOMALIES ; VARIABILITY ; MECHANISMS ; EVOLUTION
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/183853
专题气候变化
作者单位1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing, Peoples R China;
2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China
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GB/T 7714
Song, Lei,Wu, Renguang. Impacts of MJO Convection over the Maritime Continent on Eastern China Cold Temperatures[J]. JOURNAL OF CLIMATE,2019,32(12):3429-3449.
APA Song, Lei,&Wu, Renguang.(2019).Impacts of MJO Convection over the Maritime Continent on Eastern China Cold Temperatures.JOURNAL OF CLIMATE,32(12),3429-3449.
MLA Song, Lei,et al."Impacts of MJO Convection over the Maritime Continent on Eastern China Cold Temperatures".JOURNAL OF CLIMATE 32.12(2019):3429-3449.
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