Titill: | The geodetic mass balance of Eyjafjallajökull ice cap for 1945–2014: processing guidelines and relation to climate |
Höfundur: |
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Útgáfa: | 2019-04-11 |
Tungumál: | Enska |
Umfang: | 395-409 |
Háskóli/Stofnun: | Háskóli Íslands University of Iceland |
Svið: | Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) |
Deild: | Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) |
Birtist í: | Journal of Glaciology;65(251) |
ISSN: | 0022-1430 1727-5652 (eISSN) |
DOI: | 10.1017/jog.2019.16 |
Efnisorð: | Earth-Surface Processes; Geodetic mass balance; Glacier-climate relationship; Remote sensing; Jöklarannsóknir; Loftslagsbreytingar; Fjarkönnun |
URI: | https://hdl.handle.net/20.500.11815/1733 |
Tilvitnun:BELART, J., MAGNÚSSON, E., BERTHIER, E., PÁLSSON, F., AÐALGEIRSDÓTTIR, G., & JÓHANNESSON, T. (2019). The geodetic mass balance of Eyjafjallajökull ice cap for 1945–2014: Processing guidelines and relation to climate. Journal of Glaciology, 65(251), 395-409. doi:10.1017/jog.2019.16
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Útdráttur:Mass-balance measurements of Icelandic glaciers are sparse through the 20th century. However, the large archive of stereo images available allows estimates of glacier-wide mass balance in decadal time steps since 1945. Combined with climate records, they provide further insight into glacier-climate relationship. This study presents a workflow to process aerial photographs (1945-1995), spy satellite imagery (1977-1980) and modern satellite stereo images (since 2000) using photogrammetric techniques and robust statistics in a highly automated, open-source pipeline to retrieve seasonally corrected, decadal glacier-wide geodetic mass balances. In our test area, Eyjafjallajökull (S-Iceland, ~70 km2), we obtain a mass balance of <![CDATA[$, with a maximum and minimum of and , respectively, attributed to climatic forcing, and , mostly caused by the April 2010 eruption. The reference-surface mass balances correlate with summer temperature and winter precipitation, and linear regression accounts for 80% of the mass-balance variability, yielding a static sensitivity of mass balance to summer temperature and winter precipitation of-2.1 ± 0.4 m w.e.a-1K-1 and 0.5 ± 0.3 m w.e.a-1 (10%)-1, respectively. This study serves as a template that can be used to estimate the mass-balance changes and glaciers' response to climate.
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Athugasemdir:Publisher's version (útgefin grein)
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Leyfi: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 in any medium, provided the original work is properly cited.
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