DOI: 10.1007/s00382-016-3127-2
Scopus记录号: 2-s2.0-84964584254
论文题名: Rainfall variability and trends of the past six decades (1950–2014) in the subtropical NW Argentine Andes
作者: Castino F. ; Bookhagen B. ; Strecker M.R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-03-04 起始页码: 1049
结束页码: 1067
语种: 英语
英文关键词: Central Andes
; CPC-uni
; Extreme rainfall
; Orographic barrier
; Quantile regression
; Rain gauges
; South American Monsoon System
; TRMM
英文摘要: The eastern flanks of the Central Andes are characterized by deep convection, exposing them to hydrometeorological extreme events, often resulting in floods and a variety of mass movements. We assessed the spatiotemporal pattern of rainfall trends and the changes in the magnitude and frequency of extreme events (≥95th percentile) along an E-W traverse across the southern Central Andes using rain-gauge and high-resolution gridded datasets (CPC-uni and TRMM 3B42 V7). We generated different climate indices and made three key observations: (1) an increase of the annual rainfall has occurred at the transition between low (<0.5 km) and intermediate (0.5–3 km) elevations between 1950 and 2014. Also, rainfall increases during the wet season and, to a lesser degree, decreases during the dry season. Increasing trends in annual total amounts characterize the period 1979–2014 in the arid, high-elevation southern Andean Plateau, whereas trend reversals with decreasing annual total amounts were found at low elevations. (2) For all analyzed periods, we observed small or no changes in the median values of the rainfall-frequency distribution, but significant trends with intensification or attenuation in the 95th percentile. (3) In the southern Andean Plateau, extreme rainfall events exhibit trends towards increasing magnitude and, to a lesser degree, frequency during the wet season, at least since 1979. Our analysis revealed that low (<0.5 km), intermediate (0.5–3 km), and high-elevation (>3 km) areas respond differently to changing climate conditions, and the transition zone between low and intermediate elevations is characterized by the most significant changes. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: Hessisches Ministerium für Wissenschaft und Kunst
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53371
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Earth- and Environmental Sciences, University of Potsdam, Potsdam, Germany
Recommended Citation:
Castino F.,Bookhagen B.,Strecker M.R.. Rainfall variability and trends of the past six decades (1950–2014) in the subtropical NW Argentine Andes[J]. Climate Dynamics,2017-01-01,48(2017-03-04)