文章基本信息

标题：Airborne and spaceborne DEM- and laser altimetry-derived surface elevation and volume changes of the Bering Glacier system, Alaska, USA, and Yukon, Canada, 1972–2006
本地全文：下载
作者：Reginald R. Muskett ; Craig S. Lingle ; Jeanne M. Sauber 等
期刊名称：Journal of Glaciology
印刷版ISSN：0022-1430
电子版ISSN：1727-5652
出版年度：2009
卷号：55
期号：190
页码：316-326
DOI：10.3189/002214309788608750
出版社：Cambridge University Press
摘要：Using airborne and spaceborne high-resolution digital elevation models and laser altimetry, we present estimates of interannual and multi-decadal surface elevation changes on the Bering Glacier system, Alaska, USA, and Yukon, Canada, from 1972 to 2006. We find: (1) the rate of lowering during 1972–95 was 0.9 ± 0.1 m a −1 ; (2) this rate accelerated to 3.0 ± 0.7 m a −1 during 1995–2000; and (3) during 2000–03 the lowering rate was 1.5 ± 0.4 m a −1 . From 1972 to 2003, 70% of the area of the system experienced a volume loss of 191 ± 17 km 3 , which was an area-average surface elevation lowering of 1.7 ± 0.2 m a −1 . From November 2004 to November 2006, surface elevations across Bering Glacier, from McIntosh Peak on the south to Waxell Ridge on the north, rose as much as 53 m. Up-glacier on Bagley Ice Valley about 10 km east of Juniper Island nunatak, surface elevations lowered as much as 28 m from October 2003 to October 2006. NASA Terra/MODIS observations from May to September 2006 indicated muddy outburst floods from the Bering terminus into Vitus Lake. This suggests basal–englacial hydrologic storage changes were a contributing factor in the surface elevation changes in the fall of 2006.