globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-8-1331-2014
Scopus记录号: 2-s2.0-84904915509
论文题名:
Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica
作者: Le Meur E; , Sacchettini M; , Garambois S; , Berthier E; , Drouet A; S; , Durand G; , Young D; , Greenbaum J; S; , Holt J; W; , Blankenship D; D; , Rignot E; , Mouginot J; , Gim Y; , Kirchner D; , De Fleurian B; , Gagliardini O; , Gillet-Chaulet F
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期:4
起始页码: 1331
结束页码: 1346
语种: 英语
英文摘要: The grounding line is a key element of coastal outlet glaciers, acting on their dynamics. Accurately knowing its position is fundamental for both modelling the glacier dynamics and establishing a benchmark for later change detection. Here we map the grounding line of the Astrolabe Glacier in East Antarctica (66°41' S, 140°05' E), using both hydrostatic and tidal methods. The first method is based on new surface and ice thickness data from which the line of buoyant floatation is found. The second method uses kinematic GPS measurements of the tidal response of the ice surface. By detecting the transitions where the ice starts to move vertically in response to the tidal forcing we determine control points for the grounding line position along GPS profiles. Employing a two-dimensional elastic plate model, we compute the rigid short-term behaviour of the ice plate and estimate the correction required to compare the kinematic GPS control points with the previously determined line of floatation. These two approaches show consistency and lead us to propose a grounding line for the Astrolabe Glacier that significantly deviates from the lines obtained so far from satellite imagery. © Author(s) 2014. CC Attribution 3.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74817
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: CNRS, LGGE, UMR5183, 38041 Grenoble, France; Université de Grenoble Alpes, LGGE, UMR5183, 38041 Grenoble, France; ISTerre, UJF-Grenoble, CNRS, Saint-Martin-d'Héres, France; LEGOS, CNRS, Université de Toulouse, Toulouse, France; Institute for Geophysics, University of Texas, TX, United States; Earth System Science, University of California, Irvine, CA, United States; Jet Propulsion Laboratory, California, Institute of Technology, Pasadena, CA, United States; University of Iowa, Department of Physics and Astronomy, Iowa City, IA, United States; Institut Universitaire de France, Paris, France

Recommended Citation:
Le Meur E,, Sacchettini M,, Garambois S,et al. Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica[J]. Cryosphere,2014-01-01,8(4)
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