Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027034 |
Impacts of northern Tibetan Plateau on East Asian summer rainfall via modulating midlatitude transient eddies | |
Deng, Jiechun1; Xu, Haiming1,2; Shi, Ning; Zhang, Leying1; Ma, Jing1 | |
2017-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:16 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Roles of the Tibetan Plateau (TP) in forming and changing the seasonal Asian climate system have been widely explored. However, little is known about modulation effects of the TP on extratropical transient eddies (TEs) and subsequent synoptic responses of the East Asian rainfall. In this study, the Community Atmosphere Model version 5.1 coupled with a slab ocean model is employed to highlight the important role of the TP in regulating the upper-tropospheric transient wave train. Comparison between sensitivity experiments with and without the TP shows that the northern TP excites a strong anomalous anticyclone, which shifts the upper-level East Asian westerly jet northward and helps transfer barotropic and baroclinic energy from the mean flow to the synoptic TE flow. The transient wave train is primarily shifted northward by northern TP and is forced to propagate southeastward along the eastern flank of the TP until reaching eastern China. Before the strengthening of monsoonal southerlies, the TP-modulated transient wave train cools the troposphere, which decreases the static stability over northern China. Meanwhile, the associated anomalous warm advection induces ascending motion, leading to excessive rainfall by releasing unstable energy as the southerly strengthens. Due to the southeastward propagation of the wave train, anomalous heavy rainfall subsequently appears over eastern China from north to south, which increases day-to-day rainfall variation in this region. Additionally, occurrence of this upper-tropospheric transient wave train associated with low-level southerly peak is substantially increased by northern TP. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416382800017 |
WOS关键词 | INTERANNUAL VARIABILITY ; GLOBAL PRECIPITATION ; GENERAL-CIRCULATION ; CLIMATE SENSITIVITY ; REGIONAL CLIMATE ; INDIAN MONSOON ; OSCILLATION ; UPLIFT ; EDDY ; FLOW |
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/33103 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Minist Educ KLME, Joint Int Res Lab Climate & Environm Change ILCEC, CIC FEMD,Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Natl Demonstrat Ctr Expt Atmospher Sci & Environm, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Deng, Jiechun,Xu, Haiming,Shi, Ning,et al. Impacts of northern Tibetan Plateau on East Asian summer rainfall via modulating midlatitude transient eddies[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(16). |
APA | Deng, Jiechun,Xu, Haiming,Shi, Ning,Zhang, Leying,&Ma, Jing.(2017).Impacts of northern Tibetan Plateau on East Asian summer rainfall via modulating midlatitude transient eddies.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(16). |
MLA | Deng, Jiechun,et al."Impacts of northern Tibetan Plateau on East Asian summer rainfall via modulating midlatitude transient eddies".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.16(2017). |
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