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DOI | 10.1029/2018JD028921 |
On the Formation Mechanism forWintertime Extreme Precipitation Events Over the Southeastern Tibetan Plateau | |
Huang, Wenyu1,2; Qiu, Tianpei1,2; Yang, Zifan1,2; Lin, Daiyu1,2; Wright, Jonathon S.1,2; Wang, Bin1,2,3,4; He, Xinsheng1,2 | |
2018-12-13 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:22页码:12692-12714 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The formation mechanism for wintertime extreme precipitation events over the southeastern Tibetan Plateau (SETP) is explored. The crucial step in the development of these events was the emergence of a cyclonic anomaly above the Tibetan Plateau. Wave activity fluxes along a Rossby wave train embedded in the subtropical jet stream (i.e., the circumglobal teleconnection) played the dominant role in producing this cyclonic anomaly, supported by weaker wave activity fluxes along a second Rossby wave train originating over Scandinavia. The cyclonic anomaly then moved over the SETP, favored strong updrafts, large-scale moisture convergence, and intense precipitation. Extreme precipitation was more likely to ensue when the arrival of the cyclonic anomaly was preceded by persistent warm anomalies over the SETP, which favored moisture accumulation there. Temperatures above the SETP dropped sharply around the onset of the extreme precipitation. A heat budget analysis indicates that adiabatic cooling associated with convective ascent along the downstream edge of the cyclone played a leading role in this temperature drop, while a cold air intrusion associated with an anticyclonic anomaly over western Siberia (one center of action along the second wave train) played a complementary role. An Eulerian moisture budget analysis shows that variations in precipitable water delayed the onset and enhanced the intensity of these events, with moisture for precipitation delivered to the SETP mainly through the western and southern boundaries. A companion Lagrangian moisture source analysis reveals that the land areas south of the Tibetan Plateau typically contributed 78.7% of the moisture supply for these events. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452994100013 |
WOS关键词 | ASIAN SUMMER MONSOON ; ATMOSPHERIC MOISTURE ; CLIMATE-CHANGE ; SNOW COVER ; CIRCUMGLOBAL TELECONNECTIONS ; LAGRANGIAN ANALYSIS ; UPPER TROPOSPHERE ; GLACIAL RETREAT ; PASTORAL AREAS ; AUGUST 2002 |
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/32276 |
专题 | 气候变化 |
作者单位 | 1.Tsinghua Univ, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China; 2.Tsinghua Univ, DESS, Beijing, Peoples R China; 3.Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China; 4.Chinese Acad Sci, IAP, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Wenyu,Qiu, Tianpei,Yang, Zifan,et al. On the Formation Mechanism forWintertime Extreme Precipitation Events Over the Southeastern Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(22):12692-12714. |
APA | Huang, Wenyu.,Qiu, Tianpei.,Yang, Zifan.,Lin, Daiyu.,Wright, Jonathon S..,...&He, Xinsheng.(2018).On the Formation Mechanism forWintertime Extreme Precipitation Events Over the Southeastern Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(22),12692-12714. |
MLA | Huang, Wenyu,et al."On the Formation Mechanism forWintertime Extreme Precipitation Events Over the Southeastern Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.22(2018):12692-12714. |
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