DOI: 10.1007/s00382-017-3888-2
Scopus记录号: 2-s2.0-85028999963
论文题名: Precipitation extremes and their relation to climatic indices in the Pacific Northwest USA
作者: Zarekarizi M. ; Rana A. ; Moradkhani H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4519
结束页码: 4537
语种: 英语
英文关键词: Climatic indices
; Dynamical downscaling
; Pacific North–West (PNW)
; Precipitation extremes
; Principal component analysis (PCA)
; Singular value decomposition (SVD)
; Statistical downscaling
Scopus关键词: climate change
; climate prediction
; downscaling
; extreme event
; flood
; geostatistics
; North Atlantic Oscillation
; precipitation (climatology)
; principal component analysis
; singular value decomposition
; spatiotemporal analysis
; teleconnection
; Atlantic Ocean
; Atlantic Ocean (East)
; Columbia Basin
; Pacific Northwest
; Pacific Ocean
; Pacific Ocean (East)
; Pacific Ocean (West)
; United States
英文摘要: There has been focus on the influence of climate indices on precipitation extremes in the literature. Current study presents the evaluation of the precipitation-based extremes in Columbia River Basin (CRB) in the Pacific Northwest USA. We first analyzed the precipitation-based extremes using statistically (ten GCMs) and dynamically downscaled (three GCMs) past and future climate projections. Seven precipitation-based indices that help inform about the flood duration/intensity are used. These indices help in attaining first-hand information on spatial and temporal scales for different service sectors including energy, agriculture, forestry etc. Evaluation of these indices is first performed in historical period (1971–2000) followed by analysis of their relation to large scale tele-connections. Further we mapped these indices over the area to evaluate the spatial variation of past and future extremes in downscaled and observational data. The analysis shows that high values of extreme indices are clustered in either western or northern parts of the basin for historical period whereas the northern part is experiencing higher degree of change in the indices for future scenario. The focus is also on evaluating the relation of these extreme indices to climate tele-connections in historical period to understand their relationship with extremes over CRB. Various climate indices are evaluated for their relationship using Principal Component Analysis (PCA) and Singular Value Decomposition (SVD). Results indicated that, out of 13 climate tele-connections used in the study, CRB is being most affected inversely by East Pacific (EP), Western Pacific (WP), East Atlantic (EA) and North Atlaentic Oscillation (NAO). © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109276
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Portland State University, Portland, OR, United States; Swedish Meteorological and Hydrological Institute (SMHI), Norrköping, Sweden
Recommended Citation:
Zarekarizi M.,Rana A.,Moradkhani H.. Precipitation extremes and their relation to climatic indices in the Pacific Northwest USA[J]. Climate Dynamics,2018-01-01,50(2018-11-12)