DOI: 10.1007/s00382-013-1728-6
Scopus记录号: 2-s2.0-84894376976
论文题名: Distinct quasi-biweekly features of the subtropical East Asian monsoon during early and late summers
作者: Yang J. ; Bao Q. ; Wang B. ; Gong D.-Y. ; He H. ; Gao M.-N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-05-06 起始页码: 1469
结束页码: 1486
语种: 英语
英文关键词: East Asian summer monsoon
; Quasi-biweekly
英文摘要: Using Global Precipitation Climatology Project daily rainfall and ERA interim reanalysis data, we investigate the distinct characteristic of quasi-biweekly variation (QBV: 12-20 days) over East Asia (EA) during early (June 10-July 20) and late (July 21-August 31) summer. The QBV maximum variance is found over the core region of EA (30°-40°N, 110°-130°E), which includes eastern China (lower reaches of the Yellow, Huaihe, and Yangtze rivers) and the Korean Peninsula. At both its peak wet and dry phases, QBV over the core region has a baroclinic structure, but with different spatial distributions, different lower-level prevalent wind anomalies, and different upper-level major circulation anomalies in the two subseasons. Meanwhile, the two subseasons have different propagating tracks prior to reaching the peak phase, and different precursors associated with the local genesis of QBV. Furthermore, during the transition from the peak dry to peak wet phase of QBV, the major monsoon circulations have different behaviors that tropical monsoon trough extends eastward in early summer but retreats westward in late summer and the South Asia high (SAH) and western North Pacific (WNP) subtropical high move toward (away from) each other in early (late) summer. The abrupt change of mean state in mid to late July, which includes the northward migration of westerly jet, SAH and WNP, and the weakening and broken of westerly jet, is considered the root cause of the change in behavior of QBV. Finally, we indicate that the tropical monsoon trough and midlatitude westerly jet are possible sources of QBV over subtropical EA in both subseasons and provide useful guidance for 2-3 week predictions over EA. © 2013 The Author(s). 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54275
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology (ESPRE), Beijing Normal University, Beijing, 100875, China; State Key Lab. of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), IAP/CAS, Beijing, China; Department of Meteorology, and International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI, United States
Recommended Citation:
Yang J.,Bao Q.,Wang B.,et al. Distinct quasi-biweekly features of the subtropical East Asian monsoon during early and late summers[J]. Climate Dynamics,2014-01-01,42(2017-05-06)