气候变化领域集成服务门户(CCPortal): Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica

CCPortal

DOI	10.5194/tc-8-1331-2014
	Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica
	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.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
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.
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120082
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
推荐引用方式 GB/T 7714	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],2014,8(4).
APA	Le Meur E..,Sacchettini M..,Garambois S..,Berthier E..,Drouet A.S..,...&Gillet-Chaulet F..(2014).Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica.Cryosphere,8(4).
MLA	Le Meur E.,et al."Two independent methods for mapping the grounding line of an outlet glacier - An example from the Astrolabe Glacier, Terre Adélie, Antarctica".Cryosphere 8.4(2014).