Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century

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 (...

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Published in:The Cryosphere
Main Authors: Berthier, Etienne, Larsen, Christopher, Durkin, William J., Willis, Michael J., Pritchard, Matthew E.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2018
Subjects:
Online Access:https://doi.org/10.5194/tc-12-1523-2018
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00006648 2023-05-15T16:20:36+02:00 Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century Berthier, Etienne Larsen, Christopher Durkin, William J. Willis, Michael J. Pritchard, Matthew E. 2018-04 electronic https://doi.org/10.5194/tc-12-1523-2018 https://noa.gwlb.de/receive/cop_mods_00006648 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006605/tc-12-1523-2018.pdf https://tc.copernicus.org/articles/12/1523/2018/tc-12-1523-2018.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-12-1523-2018 https://noa.gwlb.de/receive/cop_mods_00006648 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006605/tc-12-1523-2018.pdf https://tc.copernicus.org/articles/12/1523/2018/tc-12-1523-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/tc-12-1523-2018 2022-02-08T22:58:55Z 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. Article in Journal/Newspaper glacier The Cryosphere Alaska Niedersächsisches Online-Archiv NOA Juneau Icefield ENVELOPE(-134.254,-134.254,58.916,58.916) Stikine ENVELOPE(-131.803,-131.803,56.699,56.699) The Cryosphere 12 4 1523 1530
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Berthier, Etienne
Larsen, Christopher
Durkin, William J.
Willis, Michael J.
Pritchard, Matthew E.
Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
topic_facet article
Verlagsveröffentlichung
description 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.
format Article in Journal/Newspaper
author Berthier, Etienne
Larsen, Christopher
Durkin, William J.
Willis, Michael J.
Pritchard, Matthew E.
author_facet Berthier, Etienne
Larsen, Christopher
Durkin, William J.
Willis, Michael J.
Pritchard, Matthew E.
author_sort Berthier, Etienne
title Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
title_short Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
title_full Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
title_fullStr Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
title_full_unstemmed Brief communication: Unabated wastage of the Juneau and Stikine icefields (southeast Alaska) in the early 21st century
title_sort brief communication: unabated wastage of the juneau and stikine icefields (southeast alaska) in the early 21st century
publisher Copernicus Publications
publishDate 2018
url https://doi.org/10.5194/tc-12-1523-2018
https://noa.gwlb.de/receive/cop_mods_00006648
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006605/tc-12-1523-2018.pdf
https://tc.copernicus.org/articles/12/1523/2018/tc-12-1523-2018.pdf
long_lat ENVELOPE(-134.254,-134.254,58.916,58.916)
ENVELOPE(-131.803,-131.803,56.699,56.699)
geographic Juneau Icefield
Stikine
geographic_facet Juneau Icefield
Stikine
genre glacier
The Cryosphere
Alaska
genre_facet glacier
The Cryosphere
Alaska
op_relation The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424
https://doi.org/10.5194/tc-12-1523-2018
https://noa.gwlb.de/receive/cop_mods_00006648
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00006605/tc-12-1523-2018.pdf
https://tc.copernicus.org/articles/12/1523/2018/tc-12-1523-2018.pdf
op_rights https://creativecommons.org/licenses/by/4.0/
uneingeschränkt
info:eu-repo/semantics/openAccess
op_rightsnorm CC-BY
op_doi https://doi.org/10.5194/tc-12-1523-2018
container_title The Cryosphere
container_volume 12
container_issue 4
container_start_page 1523
op_container_end_page 1530
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