气候变化领域集成服务门户(CCPortal): Effects of weak and strong winter currents on the thermal state of the South China sea

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DOI	10.1175/JCLI-D-19-0790.1
	Effects of weak and strong winter currents on the thermal state of the South China sea
	Wang Q.; Wang Y.; Sui J.; Zhou W.; Li D.
发表日期	2020
ISSN	0894-8755
起始页码	313
结束页码	325
卷号	34 期号:1
英文摘要	The thermal state of the South China Sea (SCS) modulates the regional climate variability over Southeast Asia. Currents in the SCS are an important factor impacting the thermal state of the SCS, but their relationship is not clearly understood. There is an asymmetry in the thermal effect of weak and strong SCS winter currents. Weak SCS winter currents favor stable warm advection of mean temperature by the anomalous horizontal velocity (i.e., Advha), which drives the SCS into a warm phase. However, the cooling effect of strong SCS winter currents on the SCS is weak, due to small and variable negative Advha. The basin-integrated Advha is primarily set by meridional heat flux in the southern SCS, which is mainly determined by the western boundary current (WBC) anomaly. The eastern boundary current (EBC) anomaly with opposite direction of WBC anomaly acts to weaken the Advha. In weak (strong) SCS winter current years, the wind stress anomaly over the southern SCS is localized around the western (eastern) boundary, which induces a weak (strong) EBC anomaly. Therefore, warm Advha in weak SCS winter current years is large enough to drive the SCS into a warm phase. However, the negative Advha in strong SCS winter current years is variable, which can be occasionally offset by positive advection of anomalous temperature by the mean horizontal velocity and then the SCS presents a warm phase, as in 1998. Thus, the strong SCS winter current exerts a weak cooling effect on the SCS. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Advection; Cooling effects; Eastern boundary current; Horizontal velocity; Mean temperature; Regional climate; South China sea; Western boundary currents; Winter currents; Heat flux; air-sea interaction; heat budget; heat flux; mixed layer; oceanic circulation; regional climate; thermodynamics; western boundary current; winter; Pacific Ocean; South China Sea; Southeast Asia
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171514
作者单位	State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; South China Sea Institute of Planning and Environmental Research, State Oceanic Administration, Guangzhou, China; National Marine Environmental Forecasting Center, Beijing, China
推荐引用方式 GB/T 7714	Wang Q.,Wang Y.,Sui J.,et al. Effects of weak and strong winter currents on the thermal state of the South China sea[J],2020,34(1).
APA	Wang Q.,Wang Y.,Sui J.,Zhou W.,&Li D..(2020).Effects of weak and strong winter currents on the thermal state of the South China sea.Journal of Climate,34(1).
MLA	Wang Q.,et al."Effects of weak and strong winter currents on the thermal state of the South China sea".Journal of Climate 34.1(2020).