气候变化领域集成服务门户(CCPortal): Atmospheric internal variability in the summer indo–northwestern pacific: role of the intraseasonal oscillation

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DOI	10.1175/JCLI-D-19-0794.1
	Atmospheric internal variability in the summer indo–northwestern pacific: role of the intraseasonal oscillation
	Wang X.; Xie S.-P.; Guan Z.
发表日期	2020
ISSN	0894-8755
起始页码	3395
结束页码	3410
卷号	33 期号:8
英文摘要	Summer atmospheric interannual variability in the Indo–northwestern Pacific (NWP) is coupled with tropical sea surface temperature (SST) variability. This study investigates the importance and origin of atmospheric internal variability in the Indo-NWP region. Using the reanalysis and the 30-member atmospheric model simulation, two SST-related interannual modes are identified in the Indo-NWP region during boreal summer with the month-reliant empirical orthogonal function analysis. The first mode is related to concurrent El Niño–Southern Oscillation originating from the eastern equatorial Pacific whereas the second mode features an anomalous anticyclone (AAC) in post–El Niño summers over the NWP region, known as the Indo-western Pacific Ocean capacitor. The SST-induced modes show temporal persistence from June to August. The residual variability is the focus of this study. The dominant mode of the residual variability displays an AAC structure over the NWP but little month-to-month persistence, indicative of atmospheric internal dynamics unrelated to SST forcing. Further investigation suggests the monthly internal AAC arises from the summer intraseasonal oscillation (ISO). The broad band of ISO yields nonzero monthly means that project strongly onto the AAC pattern. Finally, the anomalies of rainfall and low-level circulation in summer 2016 are investigated. The reversal of the low-level circulation pattern from an AAC in July to an anomalous cyclone over the NWP in August 2016 is due to the ISO-induced internal variability. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Atmospheric pressure; Atmospheric structure; Nickel compounds; Oceanography; Orthogonal functions; Storms; Surface waters; Atmospheric model simulations; Circulation patterns; Eastern equatorial Pacific; Empirical orthogonal function analysis; Interannual variability; Internal variability; Intraseasonal oscillations; Sea surface temperature (SST); Tropical engineering; air-sea interaction; annual variation; atmospheric modeling; cyclone; El Nino-Southern Oscillation; empirical analysis; sea surface temperature; seasonal variation; summer; Pacific Ocean; Pacific Ocean (Equatorial)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171367
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster/, KLME/ILCEC, Nanjing University of Information Science and Technology, Nanjing, China; Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
推荐引用方式 GB/T 7714	Wang X.,Xie S.-P.,Guan Z.. Atmospheric internal variability in the summer indo–northwestern pacific: role of the intraseasonal oscillation[J],2020,33(8).
APA	Wang X.,Xie S.-P.,&Guan Z..(2020).Atmospheric internal variability in the summer indo–northwestern pacific: role of the intraseasonal oscillation.Journal of Climate,33(8).
MLA	Wang X.,et al."Atmospheric internal variability in the summer indo–northwestern pacific: role of the intraseasonal oscillation".Journal of Climate 33.8(2020).