DOI: 10.1002/2015GL065855
论文题名: Sensitivity of soil water availability to changing snowmelt timing in the western U.S.
作者: Harpold A.A. ; Molotch N.P.
刊名: Geophysical Research Letters
ISSN: 0094-8559
EISSN: 1944-8290
出版年: 2015
卷: 42, 期: 19 起始页码: 8011
结束页码: 8020
语种: 英语
英文关键词: climate change
; snow
; snowmelt
; soil moisture
; water stress
; western US
Scopus关键词: Climate change
; Hydrology
; Moisture
; Snow
; Snow melting systems
; Soils
; Stream flow
; Ecological response
; Ecoregions
; Snow telemetry
; Snowmelt
; Soil hydrology
; Soil water availability
; Streamflow response
; Water stress
; Soil moisture
; climate change
; ecohydrology
; ecoregion
; sensitivity analysis
; snowmelt
; soil moisture
; soil water potential
; streamflow
; telemetry
; warming
; water stress
; United States
英文摘要: The ecohydrological effects of changing snowmelt are strongly mediated by soil moisture. We utilize 259 Snow Telemetry stations across the western U.S. to address two questions: (1) how do relationships between peak soil moisture (PSM) timing and the day of snow disappearance (DSD) vary across ecoregions and (2) what is the regional sensitivity of PSM timing to earlier DSD associated with warming and drying scenarios? All western U.S. ecoregions showed significant relationships between the timing of PSM and DSD. Changes in the timing of PSM based on warming predicted for the middle and end of the 21st century ranged from 1 to 9 days and from 6 to 17 days among ecoregions, respectively. The maritime ecoregions PSM timing were 2-3 times more sensitive to warming and drying versus the interior mountain ecoregions. This work suggests that soil hydrology modifies the effects of earlier snowmelt on regional streamflow response and vegetation water stress. Key Points Snow disappearance explained significant variability in peak soil moisture timing in all ecoregions Changes in peak soil moisture timing from warming were larger in maritime versus continental regions Soil hydrology modifies the impacts of earlier snowmelt to streamflow and ecological response © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946962999&doi=10.1002%2f2015GL065855&partnerID=40&md5=4666087bd2b233adca6c8709b4a086c9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8175
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Natural Resources and Environmental Science Department, University of Nevada, Reno, NV, United States
Recommended Citation:
Harpold A.A.,Molotch N.P.. Sensitivity of soil water availability to changing snowmelt timing in the western U.S.[J]. Geophysical Research Letters,2015-01-01,42(19).