Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model

doi:10.1016/j.dynatmoce.2008.09.003

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋环境与数值模拟研究室

	Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model
	Fang, Guohong 1; Wang, Yonggang 1; Wei, Zexun 1; Fang, Yue 2; Qiao, Fangli 1; Hu, Xiaomin 1
刊名	DYNAMICS OF ATMOSPHERES AND OCEANS
	2009-06
卷号	47 期号:1-3 页码:55-72
关键词	South China Sea Interocean circulation Indonesian Throughflow Heat budget Freshwater budget
ISSN号	0377-0265
DOI	10.1016/j.dynatmoce.2008.09.003
英文摘要	The South China Sea (SCS) interocean circulation and its associated heat and freshwater budgets are examined using the results of a variable-grid global ocean model. The ocean model has a 1/6 degrees resolution in the SCS and its adjacent oceans. The model results from 1982 to 2003 show that the western Pacific waters enter the SCS through the Luzon Strait with an annual mean volume transport of 4.80 Sv, of which 1.71 Sv returns to the western Pacific through the Taiwan Strait and East China Sea and 3.09 Sv flows toward the Indian Ocean. The heat in the western Pacific is transported to the SCS with a rate of 0.373 PW (relative to a reference temperature 3.72 degrees C), while the total heat transport through the outflow straits is 0.432 PW The net heat transport out of the SCS is thus 0.059 PW, which is balanced by a mean net downward heat flux of 17 W/m(2) across the SCS air-sea interface. Therefore, the interocean circulation acts as an "air conditioner", cooling the SCS and its overlaying atmosphere. The SCS contributes a heat transport of 0.279 PW to the Indian Ocean, of which 0.240 PW is from the Pacific Ocean through the Luzon Strait and 0.039 PW is from the SCS interior gained from the air-sea exchange. The Luzon Strait salt transport is greater than the total salt transport leaving the SCS by 3.97 Gg/s, implying a mean freshwater flux of 0.112 Sv (or 3.54 x 10(12) m(3)/year) from the land discharge and P - E (precipitation minus evaporation). The total annual land discharge to the SCS is estimated to be 1.60 x 10(12) m(3)/year, the total annual P-E over the SCS is thus 1.94 x 10(12) m(3)/year, equivalent to a mean P - E of 0.55 m/year. The SCS freshwater contribution to the Indian Ocean is 0.096 Sv. The pattern of the SCS interocean circulation in winter differs greatly from that in summer. The SCS branch of the Pacific-to-Indian Ocean throughflow exists in winter, but not in summer. In winter this branching flow starts at the Luzon Strait and extends to the Karimata Strait. In summer the interocean circulation is featured by a north-northeastward current starting at the Karimata Strait and extending to the Taiwan and Luzon Straits, and a subsurface inflow from the Luzon Strait that upwells into the surface layer in the SCS interior to supply the outward transports. (c) 2008 Elsevier B.V. All rights reserved.
资助项目	National Basic Research Program of China[2006CB40302] ; National Basic Research Program of China[2006CB40305]
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000265174800005
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/4401]
专题	业务部门_海洋环境与数值模拟研究室
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Peoples R China; 2.Univ Calif Berkeley, Dept Geog, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Fang, Guohong,Wang, Yonggang,Wei, Zexun,et al. Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model[J]. DYNAMICS OF ATMOSPHERES AND OCEANS,2009,47(1-3):55-72.
APA	Fang, Guohong,Wang, Yonggang,Wei, Zexun,Fang, Yue,Qiao, Fangli,&Hu, Xiaomin.(2009).Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model.DYNAMICS OF ATMOSPHERES AND OCEANS,47(1-3),55-72.
MLA	Fang, Guohong,et al."Interocean circulation and heat and freshwater budgets of the South China Sea based on a numerical model".DYNAMICS OF ATMOSPHERES AND OCEANS 47.1-3(2009):55-72.