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Remote sensing of glacier change (1965 - 2021) and identification of surge-type glaciers on Severnaya Zemlya, Russian High Arctic

Wytiahlowsky, Holly; Stokes, Chris R.; Evans, David J.A.

Remote sensing of glacier change (1965 - 2021) and identification of surge-type glaciers on Severnaya Zemlya, Russian High Arctic Thumbnail


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Abstract

Glaciers in the Russian High Arctic have undergone accelerated mass loss due to atmospheric and oceanic warming in the Barents-Kara Seas region. Most studies have concentrated on the western Barents-Kara sector, despite evidence of accelerating mass loss as far east as Severnaya Zemlya. However, long-term trends in glacier change on Severnaya Zemlya are largely unknown and this record may be complicated by surge-type glaciers. Here, we present a long-term assessment of glacier change (1965-2021) on Severnaya Zemlya and a new inventory of surge-type glaciers using declassified spy-satellite photography (KH-7/9 Hexagon) and optical satellite imagery (ASTER, Sentinel-2A, Landsat 4/5 TM & 8 OLI). Glacier area reduced from 17,053 km2 in 1965 to 16,275 in 2021 (-5%; mean: -18%, max: -100%), with areal shrinkage most pronounced at land-terminating glaciers on southern Severnaya Zemlya, where there is a recent (post-2010s) increase in summer atmospheric temperatures. We find that surging may be more widespread than previously thought, with three glaciers classified confirmed as surge-type, eight as likely to have surged and nine as possible, comprising 11% of Severnaya Zemlya’s 190 glaciers (37% by area). Under continued warming, we anticipate accelerated retreat and increased likelihood of surging as basal thermal regimes shift.

Citation

Wytiahlowsky, H., Stokes, C. R., & Evans, D. J. (2023). Remote sensing of glacier change (1965 - 2021) and identification of surge-type glaciers on Severnaya Zemlya, Russian High Arctic. Journal of Glaciology, https://doi.org/10.1017/jog.2023.60

Journal Article Type Article
Acceptance Date Jul 6, 2023
Online Publication Date Aug 17, 2023
Publication Date Aug 17, 2023
Deposit Date Aug 2, 2023
Publicly Available Date Aug 17, 2023
Journal Journal of Glaciology
Print ISSN 0022-1430
Electronic ISSN 1727-5652
Publisher International Glaciological Society
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1017/jog.2023.60
Public URL https://durham-repository.worktribe.com/output/1710446

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Published Journal Article (Advance Online Version) (22.7 Mb)
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http://creativecommons.org/licenses/by/4.0/

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.

Version
Advance Online Version





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