Subtropical dipole mode in the Southern Hemisphere: A global view

doi:10.1029/2010GL042750

IOCAS-IR > 海洋环流与波动重点实验室

	Subtropical dipole mode in the Southern Hemisphere: A global view
	Wang, F.; Wang, F, Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China
	2010-05-19
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	37 页码:L10702
文章类型	Article
摘要	A global wavenumber-3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high-pressures, in which the latent heat flux play a leading role through wind-induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied. Citation: Wang, F. (2010), Subtropical dipole mode in the Southern Hemisphere: A global view, Geophys. Res. Lett., 37, L10702, doi: 10.1029/2010GL042750.; A global wavenumber-3 dipole SST mode is showed to exist in the Southern Hemisphere subtropical climate variability in austral summer. A positive (negative) phase of the mode is characterized by cool (warm) SST anomalies in the east and warm (cool) SST anomalies in the southwest of the south Indian, Pacific, and Atlantic Oceans, respectively. This coherent dipole structure is largely a response of ocean mixed layer to the atmospheric forcing characterized by migration and modulation of the subtropical high-pressures, in which the latent heat flux play a leading role through wind-induced evaporation, although ocean dynamics may also be crucial in forming SST anomalies attached to the continents. Exploratory analyses suggest that this mode is strongly damped by the negative heat flux feedback, with a persistence time about three months and no spectral peak at interannual to decadal time scales. As the subtropical dipole mode is linearly independent of ENSO and SAM, whether it represents an additional source of climate predictability should be further studied. Citation: Wang, F. (2010), Subtropical dipole mode in the Southern Hemisphere: A global view, Geophys. Res. Lett., 37, L10702, doi: 10.1029/2010GL042750.
关键词	Air-sea Interaction Indian-ocean Coupled Variability Atlantic Circulation Reanalysis Events
学科领域	Geosciences, Multidisciplinary
DOI	10.1029/2010GL042750
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000277963200002
引用统计	被引频次：32[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/337002/1769
专题	海洋环流与波动重点实验室
通讯作者	Wang, F, Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Wang, F.,Wang, F, Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China. Subtropical dipole mode in the Southern Hemisphere: A global view[J]. GEOPHYSICAL RESEARCH LETTERS,2010,37:L10702.
APA	Wang, F.,&Wang, F, Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China.(2010).Subtropical dipole mode in the Southern Hemisphere: A global view.GEOPHYSICAL RESEARCH LETTERS,37,L10702.
MLA	Wang, F.,et al."Subtropical dipole mode in the Southern Hemisphere: A global view".GEOPHYSICAL RESEARCH LETTERS 37(2010):L10702.

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