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Frontal variations and surface area changes of Swedish glaciers during 2017-2023
Stockholm Univ, Tarfala Res Stn, Stockholm, Sweden.
KTH, School of Architecture and the Built Environment (ABE), Real Estate and Construction Management, Surveying – Geodesy, Land Law and Real Estate Planning.ORCID iD: 0000-0003-0382-9183
Stockholm Univ, Tarfala Res Stn, Stockholm, Sweden; Stockholm Univ, Dept Geol Sci, Stockholm, Sweden.
Stockholm Univ, Tarfala Res Stn, Stockholm, Sweden.
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2025 (English)In: Journal of Glaciology, ISSN 0022-1430, E-ISSN 1727-5652, Vol. 71, article id e78Article in journal (Refereed) Published
Abstract [en]

In this paper, frontal variations and surface area changes for each of the years 2017-2023 are assessed for 277 Swedish glaciers, of which the majority is contained within the Randolph Glacier Inventory 7.0. Mapping of all Swedish glaciers became possible by combining Sentinel-2 imagery, semi-automated mapping procedures and the open-source Margin Change Quantification Tool (MaQiT). In addition, manual mapping was performed at a subset of 22 glaciers historically associated with the Swedish Front Variation Program. At four of those, mapping accuracy was assessed by contrasting Sentinel-2 mapped fronts to fronts mapped in situ using Global Navigation Satellite System (GNSS), a total station and an uncrewed aerial vehicle. Results show widespread retreat of all Swedish glaciers, with cumulative frontal variation amounting on average to -55.6 m during 2017-2023 or -9.3 m a-1. Swedish glaciers had a total area of similar to 237 km2 in 2017 and of 210 km2 in 2023. The reduction by similar to 27 km2 corresponds to a loss of 11% with respect to the areal extent in the year 2017 but varies across regions. It is also almost as large as the combined area loss of Swedish glaciers in the preceding 15 years (similar to 31 km2, 2002-2017).

Place, publisher, year, edition, pages
Cambridge University Press (CUP) , 2025. Vol. 71, article id e78
Keywords [en]
frontal retreat, glacier area, remote sensing, Swedish glaciers, Tarfala
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:kth:diva-371075DOI: 10.1017/jog.2025.10057ISI: 001514533500001Scopus ID: 2-s2.0-105009133705OAI: oai:DiVA.org:kth-371075DiVA, id: diva2:2003936
Note

QC 20251006

Available from: 2025-10-06 Created: 2025-10-06 Last updated: 2025-10-06Bibliographically approved

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