DOI: 10.5194/hess-19-4845-2015
Scopus记录号: 2-s2.0-84952065404
论文题名: Subsurface storage capacity influences climate-evapotranspiration interactions in three western United States catchments
作者: Garcia E ; S ; , Tague C ; L
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 12 起始页码: 4845
结束页码: 4858
语种: 英语
Scopus关键词: Catchments
; Climate change
; Evapotranspiration
; Forestry
; Groundwater flow
; Runoff
; Sensitivity analysis
; Uncertainty analysis
; Water supply
; Watersheds
; Annual evapotranspirations
; Geophysical properties
; Interannual variation
; Parameter sensitivities
; Precipitation regimes
; Storage characteristic
; Water storage capacity
; Western United States
; Climate models
; annual variation
; atmosphere-biosphere interaction
; catchment
; climate variation
; evapotranspiration
; hydrological regime
; modeling
; recharge
; spatiotemporal analysis
; subsurface flow
; uncertainty analysis
; water storage
; watershed
; Colorado Basin [North America]
; United States
英文摘要: In the winter-wet, summer-dry forests of the western United States, total annual evapotranspiration (ET) varies with precipitation and temperature. Geologically mediated drainage and storage properties, however, may strongly influence these relationships between climate and ET. We use a physically based process model to evaluate how plant accessible water storage capacity (AWC) and rates of drainage influence model estimates of ET-climate relationships for three snow-dominated, mountainous catchments with differing precipitation regimes. Model estimates show that total annual precipitation is a primary control on inter-annual variation in ET across all catchments and that the timing of recharge is a second-order control. Low AWC, however, increases the sensitivity of annual ET to these climate drivers by 3 to 5 times in our two study basins with drier summers. ET-climate relationships in our Colorado basin receiving summer precipitation are more stable across subsurface drainage and storage characteristics. Climate driver-ET relationships are most sensitive to subsurface storage (AWC) and drainage parameters related to lateral redistribution in the relatively dry Sierra site that receives little summer precipitation. Our results demonstrate that uncertainty in geophysically mediated storage and drainage properties can strongly influence model estimates of watershed-scale ET responses to climate variation and climate change. This sensitivity to uncertainty in geophysical properties is particularly true for sites receiving little summer precipitation. A parallel interpretation of this parameter sensitivity is that spatial variation in storage and drainage properties are likely to lead to substantial within-watershed plot-scale differences in forest water use and drought stress. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78367
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, United States
Recommended Citation:
Garcia E,S,, Tague C,et al. Subsurface storage capacity influences climate-evapotranspiration interactions in three western United States catchments[J]. Hydrology and Earth System Sciences,2015-01-01,19(12)