DOI: 10.1002/joc.5734
论文题名: Moisture transport associated with large precipitation events in the Upper Colorado River Basin
作者: Kirk J.P. ; Schmidlin T.W.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 14 起始页码: 5323
结束页码: 5338
语种: 英语
英文关键词: Colorado River
; hydroclimatology
; precipitation events
; streamflow
; synoptic climatology
Scopus关键词: Climatology
; Conformal mapping
; Moisture
; Precipitation (meteorology)
; Rivers
; Self organizing maps
; Stream flow
; Water supply
; Watersheds
; Climatological analysis
; Colorado River
; Extreme precipitation events
; Hydro climatologies
; Precipitation events
; Synoptic classification
; Synoptic climatology
; Water supply forecasting
; Atmospheric movements
; climatology
; extreme event
; moisture transfer
; precipitation (climatology)
; streamflow
; synoptic meteorology
; Colorado Basin [North America]
; United States
英文摘要: Interannual streamflow variability poses numerous water supply forecasting and management challenges for mountain snowpack-sourced basins across the western United States. Previous studies have shown that substantial proportions of annual precipitation occur during relatively few large precipitation events (LPEs) and consequently, such events tend to be significant predictors of streamflow for many basins, including the Upper Colorado River Basin (UCRB). While some primary pathways of atmospheric moisture transport, particularly atmospheric rivers, have been linked with extreme precipitation events across the western United States, this study seeks to expand on this knowledge by quantifying the relationships between moisture transport regimes, LPEs, and streamflow observed in the UCRB. A climatological analysis of integrated vapour transport, via a self-organizing maps synoptic classification procedure, is used to identify geographic regimes of moisture transport that lead to LPEs, as observed at snow telemetry sites across the UCRB headwaters. Trajectory analyses are also calculated to further characterize LPE-inducing atmospheric river pathways by subbasin in the UCRB. Results indicate that LPEs throughout the basin most commonly coincide with amplified trough patterns, which advect Pacific moisture into the UCRB from the southwest, through Southern California and the Four Corners region; patterns that are positively correlated to streamflow. LPEs occurring in northern portions of the UCRB exhibit a secondary corridor, featuring west to east-oriented moisture transport, in association with zonal to meridional flow regimes. Highly amplified ridges over the region rarely lead to LPEs, as such patterns deflect or suppress moisture from the UCRB. These results suggest that climate projections of future enhanced meridional flow aloft will lead to continued streamflow variability in the UCRB. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116719
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geography, Kent State University, Kent, OH, United States
Recommended Citation:
Kirk J.P.,Schmidlin T.W.. Moisture transport associated with large precipitation events in the Upper Colorado River Basin[J]. International Journal of Climatology,2018-01-01,38(14)