In:
Journal of Glaciology, International Glaciological Society, Vol. 55, No. 190 ( 2009), p. 316-326
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
0022-1430
,
1727-5652
DOI:
10.3189/002214309788608750
Language:
English
Publisher:
International Glaciological Society
Publication Date:
2009
detail.hit.zdb_id:
2140541-4
SSG:
14
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