Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific

IOCAS-IR > 海洋环流与波动重点实验室

	Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific
	Zhang Ronghua; Li Zhongxian; Min Jinzhong
	2013-06
发表期刊	REMOTE SENSING
卷号	5 期号:6 页码:2660-2687
摘要	Recent satellite data and modeling studies indicate a pronounced role Tropical Instability Waves (TIW)-induced wind feedback plays in the tropical Pacific climate system. Previously, remotely sensed data were used to derive a diagnostic model for TIW-induced wind stress perturbations (tau(TIW)), which was embedded into an ocean general circulation model (OGCM) to take into account TIW-induced ocean-atmosphere coupling in the tropical Pacific. While the previous paper by Zhang (2013) is concerned with the effect on the mean ocean state, the present paper is devoted to using the embedded system to examine the effects on TIW activity in the ocean, with tau(TIW) being interactively determined from TIW-scale sea surface temperature (SSTTIW) fields generated in the OGCM, written as tau(TIW) = alpha(TIW).F(SSTTIW), where alpha(TIW) is a scalar parameter introduced to represent the tau(TIW) forcing intensity. Sensitivity experiments with varying alpha(TIW) (representing TIW-scale wind feedback strength) are performed to illustrate a negative feedback induced by TIW-scale air-sea coupling and its relationship with TIW variability in the ocean. Consistent with previous modeling studies, TIW wind feedback tends to have a damping effect on TIWs in the ocean, with a general inverse relationship between the tau(TIW) intensity and TIWs. It is further shown that TIW-scale coupling does not vary linearly with alpha(TIW): the coupling increases linearly with intensifying tau(TIW) forcing at low values of alpha(TIW) (in a weak tTIW forcing regime); it becomes saturated at a certain value of alpha(TIW); it decreases when alpha(TIW) goes above a threshold value as the tau(TIW) forcing increases further. This work presents a clear demonstration of using satellite data to effectively represent TIW-scale wind feedback and its multi-scale interactions with large-scale ocean processes in the tropical Pacific.
关键词	Remotely Sensed Data Tiws Tiw Wind Feedback And Coupling Ocean Modeling Tropical Pacific Sea-surface Temperature Eastern Equatorial Pacific Nino-southern-oscillation Atmospheric Variability Interannual Variability Mixed-layer Circulation Sst Radiation Stress
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/18189
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Zhang Ronghua,Li Zhongxian,Min Jinzhong. Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific[J]. REMOTE SENSING,2013,5(6):2660-2687.
APA	Zhang Ronghua,Li Zhongxian,&Min Jinzhong.(2013).Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific.REMOTE SENSING,5(6),2660-2687.
MLA	Zhang Ronghua,et al."Using Satellite Data to Represent Tropical Instability Waves (TIWs)-Induced Wind for Ocean Modeling: A Negative Feedback onto TIW Activity in the Pacific".REMOTE SENSING 5.6(2013):2660-2687.

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