Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0123.1 |
Structural Changes in the Pacific-Japan Pattern in the Late 1990s | |
Xu, Peiqiang; Wang, Lin1; Chen, Wen; Feng, Juan; Liu, Yuyun | |
2019 | |
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:2页码:607-621 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The Pacific-Japan (PJ) pattern, also known as the East Asia-Pacific pattern, is a teleconnection that significantly influences the East Asian summer climate on various time scales. Based on several reanalysis and observational datasets, this study suggests that the PJ pattern has experienced a distinct three-dimensional structural change in the late 1990s. Compared with those during 1979-98, the PJ pattern shifts eastward by approximately 20 degrees during 1999-2015, and the intensity of its barotropic structure in the extratropics weakens significantly. As a result, its influences on the summer rainfall along the mei-yu band are weakened after the late 1990s. These observed changes can be attributed to three reasons. First, the location where the PJ pattern is excited shifts eastward. Second, the easterly shear of the background wind is very weak around the source region of the PJ pattern after the late 1990s, which prevents the convection-induced baroclinic mode from converting into barotropic mode and thereby from propagating into the extratropics. Third, the PJ pattern-induced rainfall anomalies are weak along the mei-yu band after the late 1990s. As a result, their feedbacks to the PJ pattern become weak and play a considerably reduced role in maintaining the structure of the PJ pattern in the midlatitudes. In contrast, the eddy energy conversion from the basic flow efficiently maintains the PJ pattern before and after the late 1990s and thereby contributes little to the observed change. |
英文关键词 | Teleconnections Monsoons Climatology Interannual variability Interdecadal variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000454493900006 |
WOS关键词 | WESTERN NORTH PACIFIC ; ASIAN SUMMER MONSOON ; EL-NINO ; CIRCUMGLOBAL TELECONNECTION ; MERIDIONAL TELECONNECTION ; INTERANNUAL VARIABILITY ; INTERDECADAL VARIATIONS ; OCEAN CAPACITOR ; VERTICAL SHEAR ; EAST |
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/20703 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Ctr Monsoon Syst Res, Inst Atmospher Phys, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Peiqiang,Wang, Lin,Chen, Wen,et al. Structural Changes in the Pacific-Japan Pattern in the Late 1990s[J]. JOURNAL OF CLIMATE,2019,32(2):607-621. |
APA | Xu, Peiqiang,Wang, Lin,Chen, Wen,Feng, Juan,&Liu, Yuyun.(2019).Structural Changes in the Pacific-Japan Pattern in the Late 1990s.JOURNAL OF CLIMATE,32(2),607-621. |
MLA | Xu, Peiqiang,et al."Structural Changes in the Pacific-Japan Pattern in the Late 1990s".JOURNAL OF CLIMATE 32.2(2019):607-621. |
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