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Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole
Wang, WQ; Zhu, XH; Wang, CZ; Kohl, A; xiuhua.zhu@zmaw.de
2014
Source PublicationJOURNAL OF CLIMATE
ISSN0894-8755
Volume27Issue:12Pages:4508-4520
AbstractThis 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.
Department[Wang, Weiqiang] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China ; [Zhu, Xiuhua] Univ Hamburg, Ctr Erdsyst Forsch & Nachhaltigkeit, D-20144 Hamburg, Germany ; [Wang, Chunzai] NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA ; [Koehl, Armin] Univ Hamburg, Ctr Erdsyst Forsch & Nachhaltigkeit, Inst Meerskunde, D-20144 Hamburg, Germany
Funding OrganizationNSFC [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] ; 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] ; 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] ; 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]
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Funding ProjectLTO
Funding OrganizationNSFC [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] ; 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] ; 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] ; 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]
WOS IDWOS:000337659200011
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/10542
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorxiuhua.zhu@zmaw.de
Recommended Citation
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,&xiuhua.zhu@zmaw.de.(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.
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