Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aaf06f |
Investigating lake-area dynamics across a permafrost-thaw spectrum using airborne electromagnetic surveys and remote sensing time-series data in Yukon Flats, Alaska | |
Rey, David M.1,2; Walvoord, Michelle2; Minsky, Burke3; Rover, Jennifer4; Singha, Kamini1 | |
2019-02-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2019 |
卷号 | 14期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Lakes in boreal lowlands cycle carbon and supply an important source of freshwater for wildlife and migratory waterfowl. The abundance and distribution of these lakes are supported, in part, by permafrost distribution, which is subject to change. Relationships between permafrost thaw and lake dynamics remain poorly known in most boreal regions. Here, new airborne electromagnetic (AEM) data collected during June 2010 and February 2016 were used to constrain deep permafrost distribution. AEM data were coupled with Landsat-derived lake surface-area data from 1979 through 2011 to inform temporal lake behavior changes in the 35 500-km(2) Yukon Flats ecoregion of Alaska. Together, over 1500 km of AEM data, and roughly 30 years of Landsat data were used to explore processes that drive lake dynamics across a variety of permafrost thaw states not possible in studies conducted with satellite imagery or field measurements alone. Clustered time-series data identified lakes with similar temporal dynamics. Clusters possessed similarities in lake permanence (i.e. ephemeral versus perennial), subsurface permafrost distribution, and proximity to rivers and streams. Of the clustered lakes, similar to 66% are inferred to have at least intermittent connectivity with other surface-water features, similar to 19% are inferred to have shallow subsurface connectivity to other surface water features that served as a low-pass filter for hydroclimatic fluctuations, and similar to 15% appear to be isolated by surrounding permafrost (i.e. no connectivity). Integrated analysis of AEM and Landsat data reveals a progression from relatively synchronous lake dynamics among disconnected lakes in the most spatially continuous, thick permafrost to quite high spatiotemporal heterogeneity in lake behavior among variably-connected lakes in regions with notably less continuous permafrost. Variability can be explained by the preferential development of thawed permeable gravel pathways for lateral water redistribution in this area. The general spatial progression in permafrost thaw state and lake area behavior may be extended to the temporal dimension. However, extensive permafrost thaw, beyond what is currently observed, is expected to promote ubiquitous subsurface connectivity, eventually evolving to a state of increased lake synchronicity. |
英文关键词 | permafrost lake dynamics arctic boreal geophysics |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456334400001 |
WOS关键词 | ARCTIC RIVER ; THERMOKARST LAKE ; INTERIOR ALASKA ; WATER-BALANCE ; SUBLACUSTRINE ; SENSITIVITY ; BREAKUP ; HEALTH ; TRENDS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/14979 |
专题 | 气候变化 |
作者单位 | 1.Colorado Sch Mines, Hydrol Sci & Engn Program, 1500 Illinois St, Golden, CO 80401 USA; 2.US Geol Survey, Water Cycle Branch, Denver Fed Ctr, Lakewood, CO 80225 USA; 3.US Geol Survey, Geol Geophys & Geochem Sci Ctr, Denver Fed Ctr, Lakewood, CO 80225 USA; 4.US Geol Survey, Earth Resources Observat & Sci EROS Ctr, Sioux Falls, SD 57198 USA |
推荐引用方式 GB/T 7714 | Rey, David M.,Walvoord, Michelle,Minsky, Burke,et al. Investigating lake-area dynamics across a permafrost-thaw spectrum using airborne electromagnetic surveys and remote sensing time-series data in Yukon Flats, Alaska[J]. ENVIRONMENTAL RESEARCH LETTERS,2019,14(2). |
APA | Rey, David M.,Walvoord, Michelle,Minsky, Burke,Rover, Jennifer,&Singha, Kamini.(2019).Investigating lake-area dynamics across a permafrost-thaw spectrum using airborne electromagnetic surveys and remote sensing time-series data in Yukon Flats, Alaska.ENVIRONMENTAL RESEARCH LETTERS,14(2). |
MLA | Rey, David M.,et al."Investigating lake-area dynamics across a permafrost-thaw spectrum using airborne electromagnetic surveys and remote sensing time-series data in Yukon Flats, Alaska".ENVIRONMENTAL RESEARCH LETTERS 14.2(2019). |
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