The roles of atmospheric wind and entrained water temperature (T-e) in the second-year cooling of the 2010-12 La Nina event

doi:10.1007/s00382-016-3097-4

IOCAS-IR > 海洋环流与波动重点实验室

	The roles of atmospheric wind and entrained water temperature (T-e) in the second-year cooling of the 2010-12 La Nina event
	Gao, Chuan1,2 ; Zhang, Rong-Hua1,3
	2017
发表期刊	CLIMATE DYNAMICS
卷号	48 期号:1-2 页码:597-617
文章类型	Article
摘要	An intermediate coupled model (ICM) yields a successful real-time prediction of the sea surface temperature (SST) evolution in the tropical Pacific during the 2010-12 La Nia event, whereas many other coupled models fail. It was previously identified that the thermocline effect on the SST (including vertical advection and mixing), as represented by water temperature entrained into the mixed layer (T-e) and its relationship with the thermocline fluctuation, is an important factor that affects the second-year cooling in mid-late 2011. Because atmospheric wind forcing is also important to ENSO processes, its role is investigated in this study within the context of real-time prediction of the 2010-12 La Nia event using the ICM in which wind stress anomalies are calculated using an empirical model as a response to SST anomalies. An easterly wind anomaly is observed to persist over the western-central Pacific during 2010-11, which acts to sustain a horse shoe-like T-e pattern connecting large negative subsurface thermal anomalies in the central-eastern regions off and on the equator. Sensitivity experiments are conducted using the ICM to demonstrate how its SST predictions are directly affected by the intensity of wind forcing. The second-year cooling in 2011 is not predicted to occur in the ICM if the easterly wind anomaly intensity is weakly represented below certain levels; instead, a surface warming can emerge in 2011, with weak SST variability. The results of the current study indicate that the intensity of interannual wind forcing is equally important to SST evolution during 2010-11 compared with that of the thermocline effect. To correctly predict the observed La Nia conditions in the fall of 2011, the ICM needs to adequately represent the intensity of both the wind forcing and the thermocline effects.
关键词	The 2010-2012 La Nina Event Wind Forcing Thermocline Effect Coupled Model
DOI	10.1007/s00382-016-3097-4
收录类别	SCI
语种	英语
WOS记录号	WOS:000392307300034
引用统计	被引频次：46[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/136276
专题	海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100029, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China
第一作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Gao, Chuan,Zhang, Rong-Hua. The roles of atmospheric wind and entrained water temperature (T-e) in the second-year cooling of the 2010-12 La Nina event[J]. CLIMATE DYNAMICS,2017,48(1-2):597-617.
APA	Gao, Chuan,&Zhang, Rong-Hua.(2017).The roles of atmospheric wind and entrained water temperature (T-e) in the second-year cooling of the 2010-12 La Nina event.CLIMATE DYNAMICS,48(1-2),597-617.
MLA	Gao, Chuan,et al."The roles of atmospheric wind and entrained water temperature (T-e) in the second-year cooling of the 2010-12 La Nina event".CLIMATE DYNAMICS 48.1-2(2017):597-617.

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