气候变化领域集成服务门户(CCPortal): Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation

CCPortal

DOI	10.1007/s00382-020-05243-0
	Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation
	Li X.; Zhang W.; Ding R.; Shi L.
发表日期	2020
ISSN	0930-7575
起始页码	4545
结束页码	4561
卷号	54
英文摘要	This study investigates the joint impact of the boreal late winter–early spring North Pacific Victoria mode (VM) and South Pacific Quadrapole (SPQ) mode on the following summer Pacific Intertropical Convergence Zone (ITCZ) precipitation. Here, both observational data and historical simulations from the Coupled Model Intercomparison Project Phase 5 (CMIP5) models show that the precipitation anomalies are enhanced when the VM and the SPQ are in phase but are weakened when they are out of phase. The strength of the anomalous vertical velocity (ω) and outgoing longwave radiation also tend to be stronger (weaker) in same-sign (opposite-sign) events. One possible reason for this is that when the VM and the SPQ are in (out of) phase, westerly anomalies over the western–central tropical Pacific are greatly increased (reduced) due to the interactions between preceding North and South Pacific sea surface temperature anomalies, thereby enhancing (reducing) convective upward motion over the western and central Pacific. In addition, an empirical linear regression model is also developed to forecast Pacific ITCZ summer precipitation based on both the late winter–early spring VM and SPQ indices. The combination of the two precursors in North and South Pacific show higher prediction skills than the single VM or SPQ model, which means it is necessary to consider their joint impact when we focus on the Pacific ITCZ precipitation. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Intertropical Convergence Zone; Precipitation; South Pacific Quadrapole mode; Victoria mode
语种	英语
scopus关键词	climate modeling; CMIP; intertropical convergence zone; precipitation (climatology); regression analysis; sea surface temperature; seasonality; Pacific Ocean; Pacific Ocean (North); Pacific Ocean (South)
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/145464
作者单位	CIC-FEMD/ILCEC, Key Laboratory of Meteorological Disaster of Ministry of Education, School of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; School of Science, Lanzhou University of Technology, Lanzhou, 730050, China
推荐引用方式 GB/T 7714	Li X.,Zhang W.,Ding R.,et al. Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation[J],2020,54.
APA	Li X.,Zhang W.,Ding R.,&Shi L..(2020).Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation.Climate Dynamics,54.
MLA	Li X.,et al."Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation".Climate Dynamics 54(2020).