TC The Cryosphere TC The Cryosphere 1994-0424 Copernicus Publications Göttingen, Germany 10.5194/tc-7-1603-2013 Decadal changes from a multi-temporal glacier inventory of Svalbard Nuth C. https://orcid.org/0000-0002-1063-2832 1 Kohler J. 2 König M. 2 von Deschwanden A. 2 Hagen J. O. 1 Kääb A. https://orcid.org/0000-0002-6017-6564 1 Moholdt G. 1 3 Pettersson R. https://orcid.org/0000-0002-6961-0128 4 Dept. of Geosciences, University of Oslo, Oslo Norway Norwegian Polar Institute, Troms\o, Norway Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California, USA Department of Earth Sciences, Uppsala University, Uppsala, Sweden 18 10 2013 7 5 1603 1621 Copyright: © 2013 C. Nuth et al. 2013 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://tc.copernicus.org/articles/7/1603/2013/tc-7-1603-2013.html The full text article is available as a PDF file from https://tc.copernicus.org/articles/7/1603/2013/tc-7-1603-2013.pdf

We present a multi-temporal digital inventory of Svalbard glaciers with the most recent from the late 2000s containing 33 775 km<sup>2</sup> 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 km<sup>2</sup> a<sup>&minus;1</sup> over the past ~ 30 yr, representing a reduction of 7%. For a sample of ~ 400 glaciers (10 000 km<sup>2</sup>) 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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