气候变化领域集成服务门户(CCPortal): Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century

CCPortal

DOI	10.5194/tc-12-1523-2018
	Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
	Berthier E.; Larsen C.; Durkin W.J.; Willis M.J.; Pritchard M.E.
发表日期	2018
ISSN	19940416
卷号	12 期号:4
英文摘要	The large Juneau and Stikine icefields (Alaska) lost mass rapidly in the second part of the 20th century. Laser altimetry, gravimetry and field measurements suggest continuing mass loss in the early 21st century. However, two recent studies based on time series of Shuttle Radar Topographic Mission (SRTM) and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) digital elevation models (DEMs) indicate a slowdown in mass loss after 2000. Here, the ASTER-based geodetic mass balances are recalculated carefully avoiding the use of the SRTM DEM because of the unknown penetration depth of the C-band radar signal. We find strongly negative mass balances from 2000 to 2016 (-0.68 ± 0.15 m w.e. a-1 for the Juneau Icefield and -0.83 ± 0.12 m w.e. a-1 for the Stikine Icefield), in agreement with laser altimetry, confirming that mass losses are continuing at unabated rates for both icefields. The SRTM DEM should be avoided or used very cautiously to estimate glacier volume change, especially in the North Hemisphere and over timescales of less than ∼ 20 years. © 2018 Author(s).
学科领域	altimetry; ASTER; digital elevation model; field method; gravimetry; ice field; Northern Hemisphere; Shuttle Radar Topography Mission; twentieth century; Alaska; Juneau Icefield; Stikine Icefield; United States
语种	英语
scopus关键词	altimetry; ASTER; digital elevation model; field method; gravimetry; ice field; Northern Hemisphere; Shuttle Radar Topography Mission; twentieth century; Alaska; Juneau Icefield; Stikine Icefield; United States
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/119166
作者单位	LEGOS, Université de Toulouse, CNES, CNRS, IRD, UPS, Toulouse, 31400, France; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Earth and Atmospheric Sciences Department, Cornell University, Ithaca, NY, United States; Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Berthier E.,Larsen C.,Durkin W.J.,et al. Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century[J],2018,12(4).
APA	Berthier E.,Larsen C.,Durkin W.J.,Willis M.J.,&Pritchard M.E..(2018).Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century.Cryosphere,12(4).
MLA	Berthier E.,et al."Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century".Cryosphere 12.4(2018).