DOI: 10.5194/tc-9-957-2015
Scopus记录号: 2-s2.0-84929208098
论文题名: Evolution of surface velocities and ice discharge of Larsen B outlet glaciers from 1995 to 2013
作者: Wuite J ; , Rott H ; , Hetzenecker M ; , Floricioiu D ; , De Rydt J ; , Gudmundsson G ; H ; , Nagler T ; , Kern M
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 3 起始页码: 957
结束页码: 969
语种: 英语
英文关键词: glacial hydrology
; ice shelf
; ice thickness
; satellite data
; spatiotemporal analysis
; synthetic aperture radar
; Antarctica
; Larsen Ice Shelf
; Scar Inlet
; West Antarctica
英文摘要: We use repeat-pass SAR data to produce detailed maps of surface motion covering the glaciers draining into the former Larsen B Ice Shelf, Antarctic Peninsula, for different epochs between 1995 and 2013. We combine the velocity maps with estimates of ice thickness to analyze fluctuations of ice discharge. The collapse of the central and northern sections of the ice shelf in 2002 led to a near-immediate acceleration of tributary glaciers as well as of the remnant ice shelf in Scar Inlet. Velocities of most of the glaciers discharging directly into the ocean remain to date well above the velocities of the pre-collapse period. The response of individual glaciers differs and velocities show significant temporal fluctuations, implying major variations in ice discharge as well. Due to reduced velocity and ice thickness the ice discharge of Crane Glacier decreased from 5.02 Gt ag'1 in 2007 to 1.72 Gt ag'1 in 2013, whereas Hektoria and Green glaciers continue to show large temporal fluctuations in response to successive stages of frontal retreat. The velocity on Scar Inlet ice shelf increased 2-3-fold since 1995, with the largest increase in the first years after the break-up of the main section of Larsen B. Flask and Leppard glaciers, the largest tributaries to Scar Inlet ice shelf, accelerated. In 2013 their discharge was 38% and 46% higher than in 1995. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75301
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: ENVEO IT GmbH, Innsbruck, Austria; Institute for Meteorology and Geophysics, University of Innsbruck, Austria; Institute for Remote Sensing Technology, German Aerospace Center, Oberpfaffenhofen, Germany; British Antarctic Survey, Cambridge, United Kingdom; ESA-ESTEC, Noordwijk, Netherlands
Recommended Citation:
Wuite J,, Rott H,, Hetzenecker M,et al. Evolution of surface velocities and ice discharge of Larsen B outlet glaciers from 1995 to 2013[J]. Cryosphere,2015-01-01,9(3)