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DOI | 10.1007/s00382-019-04923-w |
Asymmetric impact of East Asian jet's variation on midsummer rainfall in North China and Yangtze River Valley | |
Wang, Shixin1,3; Zuo, Hongchao2; Yin, Yixing1; Wang, Jujie3; Ma, Xieyao1 | |
2019-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:6199-6213 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Variations of East Asian subtropical westerly jet (EAWJ) have a close relationship with the midsummer rainfall anomalies in Yangtze River Valley (YRV) and North China (NC). The present study shows that the relationship is asymmetric. When EAWJ is located north (south) of its median position for 1979-2013, EAWJ's southward displacement is associated with the increased (decreased) rainfall anomalies in NC and no obvious (increased) rainfall anomalies in YRV; and vice versa. The mechanism is as follows. EAWJ's southward displacement is associated with northward flow anomalies over NC and YRV, when EAWJ is located north of the median position. The associated moisture convergence and warm advection anomalies over NC cause increased rainfall anomalies in NC, while rainfall anomalies in YRV are weak due to the weak thermal advection and water vapor convergence/divergence anomalies. When EAWJ is located south of the median position, anomalous southwestward and eastward flow are observed over NC and YRV, respectively, associated with EAWJ's southward displacement. The resultant cold advection anomalies over NC cause decreased rainfall anomalies in NC, while the resultant anomalous warm advection and moisture convergence over YRV cause positive rainfall anomalies in YRV. The asymmetric circulation changes responsible for the asymmetric rainfall changes in YRV&NC are quasi-barotropic, implying that EAWJ is among the large-scale environmental forcings for the asymmetric rainfall variability in NC&YRV. |
英文关键词 | Asymmetric relationship East Asian westerly jet Midsummer rainfall Yangtze River Valley North China Dynamic mechanism |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493469900059 |
WOS关键词 | INDIAN-OCEAN DIPOLE ; SUMMER RAINFALL ; DIFFERENT CONFIGURATIONS ; INTERANNUAL VARIABILITY ; EL-NINO ; PRECIPITATION ; MONSOON ; PACIFIC ; TELECONNECTION ; ASSOCIATIONS |
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/187947 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Sch Hydrol & Water Resources, Nanjing 210044, Jiangsu, Peoples R China; 2.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Gansu, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Climate & Weather Disasters Collaborat Innovat Ct, Nanjing 210044, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Shixin,Zuo, Hongchao,Yin, Yixing,et al. Asymmetric impact of East Asian jet's variation on midsummer rainfall in North China and Yangtze River Valley[J]. CLIMATE DYNAMICS,2019,53:6199-6213. |
APA | Wang, Shixin,Zuo, Hongchao,Yin, Yixing,Wang, Jujie,&Ma, Xieyao.(2019).Asymmetric impact of East Asian jet's variation on midsummer rainfall in North China and Yangtze River Valley.CLIMATE DYNAMICS,53,6199-6213. |
MLA | Wang, Shixin,et al."Asymmetric impact of East Asian jet's variation on midsummer rainfall in North China and Yangtze River Valley".CLIMATE DYNAMICS 53(2019):6199-6213. |
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