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| Titel |
Decadal changes from a multi-temporal glacier inventory of Svalbard |
| VerfasserIn |
C. Nuth, J. Köhler, M. König, A. Deschwanden, J. O. Hagen, A. Kääb, G. Moholdt, R. Pettersson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 5 ; Nr. 7, no. 5 (2013-10-18), S.1603-1621 |
| Datensatznummer |
250085171
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| Publikation (Nr.) |
 copernicus.org/tc-7-1603-2013.pdf |
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| Zusammenfassung |
| We present a multi-temporal digital inventory of Svalbard glaciers with the
most recent from the late 2000s containing 33 775 km2 of glaciers
covering 57% of the total land area of the archipelago. At present,
68% of the glacierized area of Svalbard drains through tidewater
glaciers that have a total terminus width of ~ 740 km. The
glacierized area over the entire archipelago has decreased by an average of
80 km2 a−1 over the past ~ 30 yr, representing
a reduction of 7%. For a sample of ~ 400 glaciers
(10 000 km2) in the south and west of Spitsbergen, three digital
inventories are available from the 1930/60s, 1990 and 2007 from which we
calculate average changes during 2 epochs. In the more recent epoch, the
terminus retreat was larger than in the earlier epoch, while area shrinkage
was smaller. The contrasting pattern may be explained by the decreased
lateral wastage of the glacier tongues. Retreat rates for individual glaciers
show a mix of accelerating and decelerating trends, reflecting the large
spatial variability of glacier types and climatic/dynamic response times in
Svalbard. Lastly, retreat rates estimated by dividing glacier area changes by
the tongue width are larger than centerline retreat due to a more
encompassing frontal change estimate with inclusion of lateral area loss. |
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