气候变化领域集成服务门户(CCPortal): Diversity of intraseasonal oscillation over the western North Pacific

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DOI	10.1007/s00382-021-05780-2
	Diversity of intraseasonal oscillation over the western North Pacific
	Wang H.; Liu F.; Wang B.; Chen G.; Dong W.
发表日期	2021
ISSN	0930-7575
起始页码	1051
结束页码	1064
英文摘要	The western North Pacific (WNP) intraseasonal oscillation (ISO) is the strongest over the globe, its prediction is the cornerstone for subseasonal prediction of the Asian summer monsoon. Yet, our understanding of the diversity of the WNP ISO is limited, which challenges our modeling and prediction efforts. We study the diversity of observed WNP ISO by performing cluster analysis on propagation patterns of ISO events, targeting three clusters: westward, northeastward, and northwestward propagations. The westward cluster exists within the WNP, while the other two are related to the northeastward propagating rain band originated from the central equatorial Indian Ocean and to the northwestward propagating dipole across the western Pacific and Indian Ocean, respectively. Moist static energy (MSE) tendency contributing to these different propagations is mainly due to horizontal advection, while radiative heating mainly maintains the ISO’s development. Background sea surface temperature (SST) and MSE anomalies partly determine this ISO diversity, especially for those ISOs with large similarity. The westward cluster is related to warm SST anomalies in the western Indian Ocean, as a combination of seasonal cycle and internal interannual-to-interdecadal variability. The northeastward cluster is related to the cold Pacific Meridional Mode and La Niña-like pattern, while the northwestward cluster is related to the opposite warm background, both as the internal variability. Our finding of the background-affected ISO diversity over the WNP can be conducive to both model simulation and subseasonal prediction of the Asian summer monsoon. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Diversity; Intraseasonal oscillation; La Niña; Pacific Meridional Mode; Western Indian Ocean; Western North Pacific
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183475
作者单位	Key Laboratory of Tropical Atmosphere-Ocean System, Ministry of Education, Southern Marine Science and Engineering Guangdong Laboratory, School of Atmospheric Sciences, Sun Yat-Sen University, Zhuhai, 519082, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Atmospheric Sciences, International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, United States; Earth System Modeling Center and Climate Dynamics Research Center, Nanjing University of Information Science and Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Wang H.,Liu F.,Wang B.,et al. Diversity of intraseasonal oscillation over the western North Pacific[J],2021.
APA	Wang H.,Liu F.,Wang B.,Chen G.,&Dong W..(2021).Diversity of intraseasonal oscillation over the western North Pacific.Climate Dynamics.
MLA	Wang H.,et al."Diversity of intraseasonal oscillation over the western North Pacific".Climate Dynamics (2021).