Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL080158 |
Global Assessment of Supraglacial Debris-Cover Extents | |
Scherler, Dirk1,2; Wulf, Hendrik3; Gorelick, Noel3,4 | |
2018-11-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:21页码:11798-11805 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Switzerland |
英文摘要 | Rocky debris on glacier surfaces influences ice melt rates and the response of glaciers to climate change. However, scarce data on the extent and evolution of supraglacial debris cover have so far limited its inclusion in regional to global glacier models. Here we present global data sets of supraglacial debris-cover extents, based on Landsat 8 and Sentinel-2 optical satellite imagery. We find that about 4.4% (similar to 26,000 km(2)) of all glacier areas (excluding the Greenland ice sheet and Antarctica) are covered with debris, but that the distribution is heterogeneous. The largest debris-covered areas are located in high-mountain ranges, away from the poles. At a global scale, we find a negative scaling relationship between glacier size and percentage of debris. Therefore, the influence of debris cover on glacier mass balances is expected to increase in the future, as glaciers continue to shrink. Plain Language Summary Most of the melting of land-terminating glaciers occurs at their surface. In mountainous regions, these ice surfaces are often partly covered by rocks and sediments (debris), which can amplify, or reduce, ice melt rates, depending on debris thickness. So far, however, debris cover is rarely taken into account in models of how glaciers respond to climate change. New global data sets of debris-cover extents, based on high-resolution satellite imagery, indicate that similar to 4.4% of all glacier surfaces (excluding the Greenland ice sheet and Antarctica) are covered with debris. Debris cover is particularly common in high and steep mountain ranges but is rare in low-relief landscapes, closer to the poles. Our findings provide a basis for including debris-cover effects in regional to global glacier models. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451832600032 |
WOS关键词 | GLACIER INVENTORY ; MASS-BALANCE ; SNOW COVER ; AREA ; FLOW |
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/26419 |
专题 | 气候变化 |
作者单位 | 1.GFZ German Res Ctr Geosci, Potsdam, Germany; 2.Free Univ Berlin, Inst Geol Sci, Berlin, Germany; 3.Univ Zurich, Remote Sensing Labs, Zurich, Switzerland; 4.Google Switzerland, Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Scherler, Dirk,Wulf, Hendrik,Gorelick, Noel. Global Assessment of Supraglacial Debris-Cover Extents[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(21):11798-11805. |
APA | Scherler, Dirk,Wulf, Hendrik,&Gorelick, Noel.(2018).Global Assessment of Supraglacial Debris-Cover Extents.GEOPHYSICAL RESEARCH LETTERS,45(21),11798-11805. |
MLA | Scherler, Dirk,et al."Global Assessment of Supraglacial Debris-Cover Extents".GEOPHYSICAL RESEARCH LETTERS 45.21(2018):11798-11805. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论