Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074912 |
Accelerating Thermokarst Transforms Ice-Cored Terrain Triggering a Downstream Cascade to the Ocean | |
Rudy, A. C. A.1; Lamoureux, S. F.1; Kokelj, S. V.2; Smith, I. R.3; England, J. H.4 | |
2017-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Recent climate warming has activated the melt-out of relict massive ice in permafrost-preserved moraines throughout the western Canadian Arctic. This ice that has persisted since the last glaciation, buried beneath as little as 1 m of overburden, is now undergoing accelerated permafrost degradation and thermokarst. Here we document recent and intensifying thermokarst activity on eastern Banks Island that has increased the fluvial transport of sediments and solutes to the ocean. Isotopic evidence demonstrates that a major contribution to discharge is melt of relict ground ice, resulting in a significant hydrological input from thermokarst augmenting summer runoff. Accelerated thermokarst is transforming the landscape and the summer hydrological regime and altering the timing of terrestrial to marine and lacustrine transfers over significant areas of the western Canadian Arctic. The intensity of the landscape changes demonstrates that regions of cold, continuous permafrost are undergoing irreversible alteration, unprecedented since deglaciation (similar to 13 cal kyr B.P.). |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418572900044 |
WOS关键词 | RETROGRESSIVE THAW SLUMPS ; RICHARDSON MOUNTAINS ; NORTHWESTERN CANADA ; BANKS-ISLAND ; GROUND-ICE ; PERMAFROST ; LANDSCAPES ; PENINSULA ; MORAINES ; PLATEAU |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27862 |
专题 | 气候变化 |
作者单位 | 1.Queens Univ, Dept Geog & Planning, Kingston, ON, Canada; 2.Govt Northwest Terr, Northwest Terr Geol Survey, Yellowknife, NT, Canada; 3.Nat Resources Canada, Geol Survey Canada, Calgary, AB, Canada; 4.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada |
推荐引用方式 GB/T 7714 | Rudy, A. C. A.,Lamoureux, S. F.,Kokelj, S. V.,et al. Accelerating Thermokarst Transforms Ice-Cored Terrain Triggering a Downstream Cascade to the Ocean[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(21). |
APA | Rudy, A. C. A.,Lamoureux, S. F.,Kokelj, S. V.,Smith, I. R.,&England, J. H..(2017).Accelerating Thermokarst Transforms Ice-Cored Terrain Triggering a Downstream Cascade to the Ocean.GEOPHYSICAL RESEARCH LETTERS,44(21). |
MLA | Rudy, A. C. A.,et al."Accelerating Thermokarst Transforms Ice-Cored Terrain Triggering a Downstream Cascade to the Ocean".GEOPHYSICAL RESEARCH LETTERS 44.21(2017). |
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