Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole
	Wang, WQ ; Zhu, XH ; Wang, CZ ; Kohl, A
刊名	JOURNAL OF CLIMATE
	2014
卷号	27 期号:12 页码:4508-4520
ISSN号	0894-8755
通讯作者	xiuhua.zhu@zmaw.de
中文摘要	This paper uses the 42-yr German Estimating the Circulation and Climate of the Ocean (GECCO) synthesis data to analyze and examine the relationship of the Indian Ocean deep meridional overturning circulation (DMOC) with the Indian Ocean dipole mode (IOD). Contributions of various dynamical processes are assessed by decomposing the DMOC into the Ekman and geostrophic transport, the external mode, and a residual term. The first three terms successfully describe the DMOC with a marginal residual term. The following conclusions are obtained. First, the seasonal cycle of the DMOC is mainly determined by the Ekman component. The exception is during the transitional seasons (March-April and September-October) in the northern Indian Ocean Basin, where the geostrophic component dominates. Second, at the beginning phase of the IOD (May-June), the Ekman component dominates the DMOC structure; at and after the peak phase of the IOD (September-December), the DMOC structure is primarily determined by the geostrophic component in correspondence with the well-developed sea surface temperature anomalies, while the wind (and thus the Ekman component) plays a secondary role south of 10 degrees S and contributes negatively within the zonal band of 10 on both sides of the equator. Therefore, there exists a surface to deep-ocean connection through which IOD-related surface wind and ocean temperature anomalies are transferred down to the deep ocean. Westward-propagating signals are observed even in the deep ocean, suggesting possible roles of Rossby waves in transferring the surface signal to the deep ocean.
收录类别	SCI
资助信息	NSFC [41376024]; Strategic Priority Research Program [XDA11010301]; CAS [GJHZ201319]; Science and Technology Program of Guangzhou, China [12F084060027]; National Basic Research Program of China [2013CB430301]; Cluster of Excellence "CliSAP" from Universitat Hamburg [EXC177]
原文出处	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000337659200011
公开日期	2014-12-11
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10542]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Wang, WQ,Zhu, XH,Wang, CZ,et al. Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole[J]. JOURNAL OF CLIMATE,2014,27(12):4508-4520.
APA	Wang, WQ,Zhu, XH,Wang, CZ,&Kohl, A.(2014).Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole.JOURNAL OF CLIMATE,27(12),4508-4520.
MLA	Wang, WQ,et al."Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole".JOURNAL OF CLIMATE 27.12(2014):4508-4520.