Behaviors of nonlinearities modulating the El Nio events induced by optimal precursory disturbances

doi:10.1007/s00382-012-1557-z

IOCAS-IR > 海洋环流与波动重点实验室

	Behaviors of nonlinearities modulating the El Nio events induced by optimal precursory disturbances
	Duan, Wansuo 1; Yu, Yanshan 2; Xu, Hui 1; Zhao, Peng1,3 ; Duan, WS
	2013-03-01
发表期刊	CLIMATE DYNAMICS
ISSN	0930-7575
卷号	40 期号:5-6 页码:1399-1413
文章类型	Article
摘要	In the present paper, we explore the manner in which nonlinearities modulate El Nio events by investigating the optimal precursory disturbance for El Nio events in the Zebiak-Cane model. The initial anomalies of conditional nonlinear optimal perturbations (CNOPs) and linear singular vectors (LSVs) are investigated. The CNOPs evolve into stronger El Nio events than the LSVs and act as the optimal precursor for El Nio events. By examining the role of nonlinearities in El Nio events induced by CNOPs and LSVs, we determined that, when the initial anomalies of the CNOP and LSV structures are large, the nonlinearities enhance CNOP-El Nio events but suppress LSV-El Nio events. Nonlinearities in the Zebiak-Cane model arise from nonlinear temperature advection (NTA), sub-surface temperature parameterization (STP), and wind stress anomalies (WSA). Using these types of nonlinearities, we trace the approach of the nonlinearities modulating the CNOP- and LSV-El Nio events. The results demonstrate that nonlinearities that originate from NTA enhance both CNOP-El Nio events and LSV-El Nio events, while nonlinearities originating from STP and WSA suppress these events. For the CNOP-El Nio events, the enhancement effect of NTA is larger than the suppression effect of STP and WSA, resulting in the combined effect of the nonlinearities in the Zebiak-Cane model being an enhancement of the CNOP-El Nio events. However, for the LSV-El Nio events, the enhancement effect of NTA is smaller than the suppression effect of WSA and STP. Consequently, the combined effect of the nonlinearities in the Zebiak-Cane model suppresses the LSV-El Nio events.; In the present paper, we explore the manner in which nonlinearities modulate El Nio events by investigating the optimal precursory disturbance for El Nio events in the Zebiak-Cane model. The initial anomalies of conditional nonlinear optimal perturbations (CNOPs) and linear singular vectors (LSVs) are investigated. The CNOPs evolve into stronger El Nio events than the LSVs and act as the optimal precursor for El Nio events. By examining the role of nonlinearities in El Nio events induced by CNOPs and LSVs, we determined that, when the initial anomalies of the CNOP and LSV structures are large, the nonlinearities enhance CNOP-El Nio events but suppress LSV-El Nio events. Nonlinearities in the Zebiak-Cane model arise from nonlinear temperature advection (NTA), sub-surface temperature parameterization (STP), and wind stress anomalies (WSA). Using these types of nonlinearities, we trace the approach of the nonlinearities modulating the CNOP- and LSV-El Nio events. The results demonstrate that nonlinearities that originate from NTA enhance both CNOP-El Nio events and LSV-El Nio events, while nonlinearities originating from STP and WSA suppress these events. For the CNOP-El Nio events, the enhancement effect of NTA is larger than the suppression effect of STP and WSA, resulting in the combined effect of the nonlinearities in the Zebiak-Cane model being an enhancement of the CNOP-El Nio events. However, for the LSV-El Nio events, the enhancement effect of NTA is smaller than the suppression effect of WSA and STP. Consequently, the combined effect of the nonlinearities in the Zebiak-Cane model suppresses the LSV-El Nio events.
关键词	El Nino Nonlinearity Optimal Perturbation
学科领域	Meteorology & Atmospheric Sciences
DOI	10.1007/s00382-012-1557-z
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000315440100021
WOS关键词	NINO-SOUTHERN-OSCILLATION ; OCEAN RECHARGE PARADIGM ; OPTIMAL PERTURBATION ; COUPLED MODEL ; INTERANNUAL VARIABILITY ; ENSO PREDICTABILITY ; DECADAL VARIABILITY ; CONCEPTUAL-MODEL ; ATMOSPHERE MODEL ; PREDICTION
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：44[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/337002/16394
专题	海洋环流与波动重点实验室
通讯作者	Duan, WS
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Duan, Wansuo,Yu, Yanshan,Xu, Hui,et al. Behaviors of nonlinearities modulating the El Nio events induced by optimal precursory disturbances[J]. CLIMATE DYNAMICS,2013,40(5-6):1399-1413.
APA	Duan, Wansuo,Yu, Yanshan,Xu, Hui,Zhao, Peng,&Duan, WS.(2013).Behaviors of nonlinearities modulating the El Nio events induced by optimal precursory disturbances.CLIMATE DYNAMICS,40(5-6),1399-1413.
MLA	Duan, Wansuo,et al."Behaviors of nonlinearities modulating the El Nio events induced by optimal precursory disturbances".CLIMATE DYNAMICS 40.5-6(2013):1399-1413.

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