Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073245 |
Bed elevation of Jakobshavn Isbr ae, West Greenland, from high-resolution airborne gravity and other data | |
An, L.1; Rignot, E.1,2; Elieff, S.3; Morlighem, M.1; Millan, R.1; Mouginot, J.1; Holland, D. M.4; Holland, D.4; Paden, J.5 | |
2017-04-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | Jakobshavn Isbr ae, West Greenland, which holds a 0.6 m sea level volume equivalent, has been speeding up and retreating since the late 1990s. Interpretation of its retreat has been hindered by difficulties in measuring its ice thickness with airborne radar depth sounders. Here we employ high-resolution, helicopter-borne gravity data from 2012 to reconstruct its bed elevation within 50 km of the ocean margin using a three-dimensional inversion constrained by fjord bathymetry data offshore and a mass conservation algorithm inland. We find the glacier trough to be asymmetric and several 100 m deeper than estimated previously in the lower part. From 1996 to 2016, the grounding line migrated at 0.6 km/yr from 700 m to 1100 m depth. Upstream, the bed drops to 1600 m over 10 km then slowly climbs to 1200 m depth in 40 km. Jakobshavn Isbr ae will continue to retreat along a retrograde slope for decades to come. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401847500034 |
WOS关键词 | OUTLET GLACIERS ; ACCELERATION ; RETREAT ; BENEATH |
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/26288 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA; 2.CALTECH, Jet Prop Lab, Pasadena, CA USA; 3.Sander Geophys, Ottawa, ON, Canada; 4.NYU, Courant Inst Math Sci, New York, NY USA; 5.Univ Kansas, CReSIS Ctr, Lawrence, KS 66045 USA |
推荐引用方式 GB/T 7714 | An, L.,Rignot, E.,Elieff, S.,et al. Bed elevation of Jakobshavn Isbr ae, West Greenland, from high-resolution airborne gravity and other data[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(8). |
APA | An, L..,Rignot, E..,Elieff, S..,Morlighem, M..,Millan, R..,...&Paden, J..(2017).Bed elevation of Jakobshavn Isbr ae, West Greenland, from high-resolution airborne gravity and other data.GEOPHYSICAL RESEARCH LETTERS,44(8). |
MLA | An, L.,et al."Bed elevation of Jakobshavn Isbr ae, West Greenland, from high-resolution airborne gravity and other data".GEOPHYSICAL RESEARCH LETTERS 44.8(2017). |
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