Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation

doi:10.1007/s00382-020-05243-0

CORC > 兰州理工大学 > 兰州理工大学

	Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation
	Li, Xumin 3; Zhang, Wenjun 3; Ding, Ruiqiang 2; Shi, Liang 1
刊名	CLIMATE DYNAMICS
	2020-06-01
卷号	54 期号:11-12 页码:4545-4561
关键词	Intertropical Convergence Zone Precipitation Victoria mode South Pacific Quadrapole mode
ISSN号	0930-7575
DOI	10.1007/s00382-020-05243-0
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 (omega) 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.
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000527481100002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155207]
专题	兰州理工大学
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China 2.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Minist Educ, Sch Atmospher Sci, CIC FEMD ILCEC Key Lab Meteorol Disaster, Nanjing 210044, Peoples R China;
推荐引用方式 GB/T 7714	Li, Xumin,Zhang, Wenjun,Ding, Ruiqiang,et al. Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation[J]. CLIMATE DYNAMICS,2020,54(11-12):4545-4561.
APA	Li, Xumin,Zhang, Wenjun,Ding, Ruiqiang,&Shi, Liang.(2020).Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation.CLIMATE DYNAMICS,54(11-12),4545-4561.
MLA	Li, Xumin,et al."Joint impact of North Pacific Victoria mode and South Pacific Quadrapole mode on Pacific ITCZ summer precipitation".CLIMATE DYNAMICS 54.11-12(2020):4545-4561.