气候变化领域集成服务门户(CCPortal): Interannual variability and triggers of the South China Sea summer monsoon withdrawal

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DOI	10.1007/s00382-019-04790-5
	Interannual variability and triggers of the South China Sea summer monsoon withdrawal
	Hu P.; Chen W.; Chen S.; Huang R.
发表日期	2019
ISSN	0930-7575
起始页码	4355
结束页码	4372
卷号	53 期号:2020-07-08
英文摘要	The interannual variability of the South China Sea (SCS) summer monsoon (SM) withdrawal and associated factors are examined using NCEP/NCAR reanalysis, CMAP rainfall, and OLR data. During late-withdrawal years of the SCSSM, a significant cyclonic anomaly is observed over southern China and northern SCS, accompanied by pronounced anomalous low-level westerly winds over the Bay of Bengal that extend eastward to the Philippine Sea. At the upper level, significant easterly wind anomalies are seen over the SCS. Corresponding to these circulation anomalies, a dipole rainfall anomaly mode is observed, with significant positive (negative) rainfall anomalies over the SCS and Philippine Sea (equatorial Indian Ocean). The seasonal progressions of several monsoonal parameters (e.g., zonal wind, rainfall, convection activity) over the SCS also show significant differences between late- and early-withdrawal years. Observational evidence shows that tropical cyclone (TC) activities over the SCS and Philippine Sea and the active/suppressed phases of 30‒60 day oscillations are two important factors that may contribute to the interannual variability of SCSSM withdrawal. Both statistical evidence and case studies verify that the 30‒60 day oscillation impacts SCSSM withdrawal by modulating convection activity and anomalous zonal winds over the SCS. In addition to the TC activities and 30‒60 day oscillations, the interannual variability of the SCSSM withdrawal can also be affected by synoptic systems, including easterly wave and cold front. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Interannual variability; Intraseasonal oscillations; South China Sea; Summer monsoon withdrawal; Tropical cyclones
语种	英语
scopus关键词	annual variation; atmospheric circulation; monsoon; rainfall; tropical cyclone; westerly; Pacific Ocean; Philippine Sea; South China Sea
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145983
作者单位	Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100190, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; Guangzhou Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, 510080, China
推荐引用方式 GB/T 7714	Hu P.,Chen W.,Chen S.,et al. Interannual variability and triggers of the South China Sea summer monsoon withdrawal[J],2019,53(2020-07-08).
APA	Hu P.,Chen W.,Chen S.,&Huang R..(2019).Interannual variability and triggers of the South China Sea summer monsoon withdrawal.Climate Dynamics,53(2020-07-08).
MLA	Hu P.,et al."Interannual variability and triggers of the South China Sea summer monsoon withdrawal".Climate Dynamics 53.2020-07-08(2019).