Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.6169 |
Relationship between interannual changes of summer rainfall over Yangtze River Valley and South China Sea-Philippine Sea: Possible impact of tropical zonal sea surface temperature gradient | |
Ha, Yao1,2,3,4,5; Zhong, Zhong1,2,3,4,5; Zhang, Yun1; Ding, Jinfeng1,4,5; Yang, Xiangrong1,6 | |
2019-11-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:14页码:5522-5538 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigates the interannual variability of rainfall over the middle and lower reaches of Yangtze River Valley (MLYRV) and that over the South China Sea and Philippine Sea (SCS-PS) during boreal summer (June-August) from 1979 to 2012. Results exhibit out-of-phase rainfall variations between the MLYRV and the SCS-PS, which is closely related to the tropical zonal sea surface temperature gradient (ZSG) between the northern Indian Ocean (NIO; 5 degrees-25 degrees N, 60 degrees-100 degrees E) and the equatorial central and eastern Pacific (CEP; 5 degrees S-5 degrees N, 180 degrees-130 degrees W). The ZSG can explain as much as 40% of the total variance of the summer rainfall over the MLYRV and the SCS-PS in the past 40 years. This is much higher than that explained by the NIO SST (24%), CEP SST (14%) and Nino-3.4 index (16%) alone. A positive ZSG between the warm NIO and the cold CEP tends to increase rainfall over the MLYRV and decrease rainfall over the SCS-PS, whereas a negative ZSG between the cold NIO and the warm CEP is generally favourable for rainfall over the SCS-PS and unfavourable for rainfall over MLYRV. The close connection between the ZSG and the out-of-phase interannual rainfall variation over the two regions can be explained by influences of the ZSG on atmospheric circulation over East Asia. A positive ZSG induces anomalous easterlies and Walker-like circulation in the tropics, which results in an anomalous subsidence and boundary layer divergence over the SCS-PS. As a result, summer rainfall decreases in this region. Meanwhile, moisture transport increases due to the anomalously strong southwesterlies along the northwestern flank of the intensified western Pacific subtropical high, providing more precipitable water to the MLYRV region. In contrast, a negative ZSG induces surface westerlies and favourable environmental condition for rainfall over the SCS-PS. Dry descending flow induced by local anomalous Hadley circulation develops over the MLYRV around 30 degrees N, which is unfavourable for rainfall over the MLYRV. The mechanism further examined using numerical experiments. These thermal-dynamical processes induced by the ZSG work together to cause the out-of-phase interannual changes of rainfall between the MLYRV and the SCS-PS, suggesting that the ZSG is highly indicative of the interannual change of summer rainfall in the two regions. |
英文关键词 | equatorial central and eastern Pacific interannual variability middle-lower reaches of Yangtze River Valley northern Indian Ocean out-of-phase relationship Philippine Sea South China Sea summer rainfall tropical zonal SST gradient |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000492898900020 |
WOS关键词 | WESTERN NORTH PACIFIC ; WATER-VAPOR TRANSPORT ; INDIAN-OCEAN ; SST ANOMALIES ; EL-NINO ; PRECIPITATION VARIABILITY ; INTERDECADAL VARIATIONS ; RELATIVE CONTRIBUTIONS ; GLOBAL PRECIPITATION ; HEMISPHERE SUMMER |
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/225485 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Natl Univ Def Technol, Coll Meteorol & Oceanog, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing, Jiangsu, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China; 4.Nanjing Univ, Jiangsu Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China; 5.Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 6.75839 Army PLA, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Ha, Yao,Zhong, Zhong,Zhang, Yun,et al. Relationship between interannual changes of summer rainfall over Yangtze River Valley and South China Sea-Philippine Sea: Possible impact of tropical zonal sea surface temperature gradient[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(14):5522-5538. |
APA | Ha, Yao,Zhong, Zhong,Zhang, Yun,Ding, Jinfeng,&Yang, Xiangrong.(2019).Relationship between interannual changes of summer rainfall over Yangtze River Valley and South China Sea-Philippine Sea: Possible impact of tropical zonal sea surface temperature gradient.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(14),5522-5538. |
MLA | Ha, Yao,et al."Relationship between interannual changes of summer rainfall over Yangtze River Valley and South China Sea-Philippine Sea: Possible impact of tropical zonal sea surface temperature gradient".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.14(2019):5522-5538. |
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