Upper ocean dynamics and its role in maintaining the annual mean western Pacific warm pool in a global GCM

IOCAS-IR

	Upper ocean dynamics and its role in maintaining the annual mean western Pacific warm pool in a global GCM
	Qu, TD ; Meyers, G ; Godfrey, JS ; Hu, DX
	1997-06-15
发表期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
卷号	17 期号:7 页码:711-724
摘要	This study provides a description of the large-scale aspects of upper ocean dynamics and its role in balancing the annual mean surface heat budget in the tropical western Pacific Ocean, using the results from an ocean general circulation model (GCM) combined with existing observations. A comparison with observations shows that the model simulates major aspects of the observed upper-layer thermal structure and circulation, and it has a reasonable representation of net surface heat flux. The heat flux in the model is of the order of 10 W m(-2) into the ocean near the Equator and less at high latitudes, which supports the previous inference that fluxes in the region are overestimated in most climatologies. The annual mean surface heat budget of the model averaged over a large region (20 degrees S-20 degrees N and 110 degrees E-160 degrees E) indicates that heat is generally transported downward to the deeper levels by vertical motion and mixing, which agrees with earlier studies. However, close inspection of six subregions within the large region indicates that different mechanisms are balancing the surface heat budget in different subregions. Horizontal advection is important in some subregions. Upper-layer convergence induced by the equatorward western boundary currents in the region of the North Equatorial Countercurrent (NECC) is equivalent to a surface heat flux of 17 W m(-2) into the ocean, about 5 W m(-2) larger than the net exchange of heat between ocean and atmosphere in the model. This provides a reasonable explanation for why the warmest (> 28 degrees C) water of the global oceans exists in the tropical western Pacific and an independent evidence for Wyrtki's hypothesis of accumulation of heat in the region. The residence time of the warm pool water is about 8 months in the model shorter by a factor of about two than Wyrtki's estimate of 1.3 years. (C) 1997 by the Royal Meteorological Society.
关键词	ocean dynamics heat budget warm pool general circulation model western Pacific Ocean
收录类别	SCI
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:A1997XF29900003
出版者	JOHN WILEY & SONS LTD
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/157242
专题	中国科学院海洋研究所
作者单位	1.CHINESE ACAD SCI,INST OCEANOL,QINGDAO,PEOPLES R CHINA 2.CSIRO,DIV OCEANOG,HOBART,TAS 7001,AUSTRALIA
推荐引用方式 GB/T 7714	Qu, TD,Meyers, G,Godfrey, JS,et al. Upper ocean dynamics and its role in maintaining the annual mean western Pacific warm pool in a global GCM[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,1997,17(7):711-724.
APA	Qu, TD,Meyers, G,Godfrey, JS,&Hu, DX.(1997).Upper ocean dynamics and its role in maintaining the annual mean western Pacific warm pool in a global GCM.INTERNATIONAL JOURNAL OF CLIMATOLOGY,17(7),711-724.
MLA	Qu, TD,et al."Upper ocean dynamics and its role in maintaining the annual mean western Pacific warm pool in a global GCM".INTERNATIONAL JOURNAL OF CLIMATOLOGY 17.7(1997):711-724.