DOI: 10.1002/grl.50672
论文题名: Controls on recent Alaskan lake changes identified from water isotopes and remote sensing
作者: Anderson L. ; Birks J. ; Rover J. ; Guldager N.
刊名: Geophysical Research Letters
ISSN: 0094-8823
EISSN: 1944-8554
出版年: 2013
卷: 40, 期: 13 起始页码: 3413
结束页码: 3418
语种: 英语
英文关键词: discontinuous permafrost
; lakes
; stable isotopes
; sub-Arctic
; surface water
; water balance
Scopus关键词: Discontinuous permafrost
; Groundwater sources
; Isotope compositions
; Remotely sensed imagery
; Stable isotopes
; Sub-arctic
; Subsequent reduction
; Water balance
; Evaporation
; Isotopes
; Permafrost
; Phase transitions
; Surface waters
; Lakes
; evaporation
; lake ecosystem
; permafrost
; remote sensing
; river water
; satellite imagery
; snowmelt
; surface area
; trend analysis
; water budget
; waterfowl
; Alaska
; United States
; Yukon Flats
; Anatidae
英文摘要: High-latitude lakes are important for terrestrial carbon dynamics and waterfowl habitat driving a need to better understand controls on lake area changes. To identify the existence and cause of recent lake area changes in the Yukon Flats, a region of discontinuous permafrost in north central Alaska, we evaluate remotely sensed imagery with lake water isotope compositions and hydroclimatic parameters. Isotope compositions indicate that mixtures of precipitation, river water, and groundwater source ~95% of the studied lakes. The remaining minority are more dominantly sourced by snowmelt and/or permafrost thaw. Isotope-based water balance estimates indicate 58% of lakes lose more than half of inflow by evaporation. For 26% of the lakes studied, evaporative losses exceeded supply. Surface area trend analysis indicates that most lakes were near their maximum extent in the early 1980s during a relatively cool and wet period. Subsequent reductions can be explained by moisture deficits and greater evaporation. Key Points Isotopes of lake water identify net water balance and dominant water sources Most Yukon Flats lakes have evaporation losses that exceed 50% of inflow Recent lake reductions can be explained by hydroclimatic variations ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880015098&doi=10.1002%2fgrl.50672&partnerID=40&md5=fd1b8c1c83860eb2278d3d87849636fa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6087
Appears in Collections: 气候减缓与适应
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作者单位: Geosciences and Environmental Change, U.S. Geological Survey, Denver CO 80225, United States
Recommended Citation:
Anderson L.,Birks J.,Rover J.,et al. Controls on recent Alaskan lake changes identified from water isotopes and remote sensing[J]. Geophysical Research Letters,2013-01-01,40(13).