干旱区生态环境知识资源中心(Arid): Atmospheric dynamics of extreme discharge events from 1979 to 2016 in the southern Central Andes

Arid

DOI	10.1007/s00382-020-05458-1
	Atmospheric dynamics of extreme discharge events from 1979 to 2016 in the southern Central Andes
	Castino, F.; Bookhagen, B.; de la Torre, A.
通讯作者	Castino, F
来源期刊	CLIMATE DYNAMICS
ISSN	0930-7575
EISSN	1432-0894
出版年	2020
卷号	55 期号:11-12 页码:3485-3505
英文摘要	During the South-American Monsoon season, deep convective systems occur at the eastern flank of the Central Andes leading to heavy rainfall and flooding. We investigate the large- and meso-scale atmospheric dynamics associated with extreme discharge events (> 99.9th percentile) observed in two major river catchments meridionally stretching from humid to semi-arid conditions in the southern Central Andes. Based on daily gauge time series and ERA-Interim reanalysis, we made the following three key observations: (1) for the period 1940-2016 daily discharge exhibits more pronounced variability in the southern, semi-arid than in the northern, humid catchments. This is due to a smaller ratio of discharge magnitudes between intermediate (0.2 year return period) and rare events (20 year return period) in the semi-arid compared to the humid areas; (2) The climatological composites of the 40 largest discharge events showed characteristic atmospheric features of cold surges based on 5-day time-lagged sequences of geopotential height at different levels in the troposphere; (3) A subjective classification revealed that 80% of the 40 largest discharge events are mainly associated with the north-northeastward migration of frontal systems and 2/3 of these are cold fronts, i.e. cold surges. This work highlights the importance of cold surges and their related atmospheric processes for the generation of heavy rainfall events and floods in the southern Central Andes.
英文关键词	South American monsoon system Cold surges Orographic barrier Mesoscale convective systems Extreme discharge Daily-discharge time series ERA-interim
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000570038300001
WOS关键词	COLD-AIR INCURSIONS ; QUELCCAYA ICE CAP ; RAINFALL VARIABILITY ; ERA-INTERIM ; CLIMATE VARIABILITY ; RIVER DISCHARGE ; TROPICAL ANDES ; EROSION RATES ; LOW-LEVEL ; PRECIPITATION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326341
作者单位	[Castino, F.; Bookhagen, B.] Univ Potsdam, Inst Geosci, Potsdam, Germany; [de la Torre, A.] Austral Univ, LIDTUA, Fac Engn, Pilar, Buenos Aires, Argentina; [de la Torre, A.] Consejo Nacl Invest Cient & Tecn, Pilar, Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Castino, F.,Bookhagen, B.,de la Torre, A.. Atmospheric dynamics of extreme discharge events from 1979 to 2016 in the southern Central Andes[J],2020,55(11-12):3485-3505.
APA	Castino, F.,Bookhagen, B.,&de la Torre, A..(2020).Atmospheric dynamics of extreme discharge events from 1979 to 2016 in the southern Central Andes.CLIMATE DYNAMICS,55(11-12),3485-3505.
MLA	Castino, F.,et al."Atmospheric dynamics of extreme discharge events from 1979 to 2016 in the southern Central Andes".CLIMATE DYNAMICS 55.11-12(2020):3485-3505.