Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074370 |
Spatial Patterns of Summer Speedup on South Central Alaska Glaciers | |
Armstrong, William H.1,2,3; Anderson, Robert S.2,3; Fahnestock, Mark A.4 | |
2017-09-28 | |
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:18 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Seasonal changes in glacier basal motion are attributable to variations in subglacial hydrology and cause variations in both ice discharge and glacier erosion. We develop a novel workflow based upon Landsat 8 feature tracking to document differences between spatial patterns of summer and winter glacier surface speed, which reflect changes in the distribution of basal motion. We identify and characterize summer speedups on 13 of 19 land-terminating glaciers in Alaska's Wrangell-St Elias Ranges. The speedups are relatively uniform over much of the ablation zones, and the speedup magnitudes vary by only a factor of similar to 2 between glaciers whose velocities span an order of magnitude. Summer speedups extend up to similar to 30km up glacier from termini and often end at the bases of icefalls. These data provide systematic observation of the spatial pattern of enhanced summer glacier basal motion and suggest the possibility of its parameterization in glacier models. |
英文关键词 | glacier glacier basal sliding glacier erosion cryosphere remote sensing Landsat |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413148100033 |
WOS关键词 | GREENLAND ICE-SHEET ; SUBGLACIAL WATER-PRESSURE ; BLACK-RAPIDS GLACIER ; COLUMBIA GLACIER ; SURFACE MOTION ; EVOLUTION ; FLOW ; VELOCITY ; MODEL ; USA |
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/27867 |
专题 | 气候变化 |
作者单位 | 1.Appalachian State Univ, Dept Geol & Environm Sci, Boone, NC 28608 USA; 2.Univ Colorado Boulder, Inst Arctic & Alpine Res, Boulder, CO 80309 USA; 3.Univ Colorado Boulder, Dept Geol Sci, Boulder, CO 80309 USA; 4.Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA |
推荐引用方式 GB/T 7714 | Armstrong, William H.,Anderson, Robert S.,Fahnestock, Mark A.. Spatial Patterns of Summer Speedup on South Central Alaska Glaciers[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(18). |
APA | Armstrong, William H.,Anderson, Robert S.,&Fahnestock, Mark A..(2017).Spatial Patterns of Summer Speedup on South Central Alaska Glaciers.GEOPHYSICAL RESEARCH LETTERS,44(18). |
MLA | Armstrong, William H.,et al."Spatial Patterns of Summer Speedup on South Central Alaska Glaciers".GEOPHYSICAL RESEARCH LETTERS 44.18(2017). |
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