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DOI | 10.1175/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
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
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 |
推荐引用方式 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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