A New Type of the Indian Ocean Dipole since the Mid-1970s

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)

	A New Type of the Indian Ocean Dipole since the Mid-1970s
	[Du, Yan ; Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China ; [Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia
刊名	JOURNAL OF CLIMATE
	2013
卷号	26 期号:3 页码:959-972
ISSN号	0894-8755
通讯作者	duyan@scsio.ac.cn
中文摘要	The tropical Indian Ocean dipole/zonal mode (IOD) is phase locked with the austral winter and spring seasons. This study describes three types of the IOD in terms of their peak time and duration. In particular, the authors focus on a new type that develops in May-June and matures in July-August, which is distinctively different from the canonical IOD, which may develop later and peak in September-November or persist from June to November. Such "unseasonable" IOD events are only observed since the mid-1970s, a period after which the tropical Indian Ocean has a closer relationship with the Pacific Ocean. The unseasonable IOD is an intrinsic mode of the Indian Ocean and occurs without an ensuing El Nino. A change in winds along the equator is identified as a major forcing. The wind change is in turn related to a weakening Walker circulation in the Indian Ocean sector in austral winter, which is in part forced by the rapid Indian Ocean warming. Thus, although the occurrence of the unseasonable IOD may be partially influenced by oceanic variability, the authors' results suggest an influence from the Indian Ocean warming. This suggestion, however, awaits further investigation using fully coupled climate models.
学科主题	Meteorology & Atmospheric Sciences
资助信息	We thank S.-P. Xie of IPRC/UH, T. Cowan and Ben Ng of MAR/CSIRO for useful discussions, and K. Liu and L. Zhang of LTO/SCSIO for help with satellite data processing. The SSM/I wind data were obtained from the Physical Oceanography Distributed Active Archive Center (http://podaac.jpl.nasa.gov). The NCEP reanalysis was provided by the NOAA/CIRES Climate Diagnostics Center (http://www.cdc.noaa.gov). The satellite merged SSH data were obtained from APDRC in IPRC-SOEST, University of Hawaii (http://apdrc.soest.hawaii.edu). Mentawai coral delta¹⁸O data and the DMI reconstruction are provided by N. J. Abram through the NOAA/NCDC Paleoclimatology Program (Data Contribution Series 2009-137). This work is supported by MoST (2010CB950302 and 2012CB955603), CAS (XDA05090404), and NSFC (41176024) and by the Australian Climate Change Science Program and the Southeast Australia Climate Initiative.
原文出处	AMER METEOROLOGICAL SOC
语种	英语
WOS记录号	WOS:000314695500018
公开日期	2015-01-14
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10934]
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	[Du, Yan,Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China,[Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia. A New Type of the Indian Ocean Dipole since the Mid-1970s[J]. JOURNAL OF CLIMATE,2013,26(3):959-972.
APA	[Du, Yan,Wu, Yanling] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China,&[Cai, Wenju] CSIRO Marine & Atmospher Res, Aspendale, Vic, Australia.(2013).A New Type of the Indian Ocean Dipole since the Mid-1970s.JOURNAL OF CLIMATE,26(3),959-972.
MLA	[Du, Yan,et al."A New Type of the Indian Ocean Dipole since the Mid-1970s".JOURNAL OF CLIMATE 26.3(2013):959-972.