changes in the southeast vatnajökull ice cap, iceland, between ~ 1890 and 2010
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2015
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Abstract
Area and volume changes and the average geodetic mass balance of the
non-surging outlet glaciers of the southeast Vatnajökull ice cap, Iceland,
during different time periods between ~ 1890 and 2010, are derived from
a multi-temporal glacier inventory. A series of digital elevation models
(DEMs) (~ 1890, 1904, 1936, 1945, 1989, 2002, 2010) are compiled from
glacial geomorphological features, historical photographs, maps, aerial
images, DGPS measurements and a lidar survey. Given the mapped basal
topography, we estimate volume changes since the end of the Little Ice Age
(LIA) ~ 1890. The variable volume loss of the outlets to similar
climate forcing is related to their different hypsometry, basal topography,
and the presence of proglacial lakes. In the post-LIA period, the glacierized
area decreased by 164 km2 (or from 1014 to 851 km2) and the
glaciers had lost 10–30 % of their ~ 1890 area by 2010 (anywhere
from 3 to 36 km2). The glacier surface lowered by 150–270 m near the
terminus and the outlet glaciers collectively lost 60 ± 8 km3 of
ice, which is equivalent to 0.15 ± 0.02 mm of sea-level rise. The
volume loss of individual glaciers was in the range of 15–50%,
corresponding to a geodetic mass balance between −0.70 and
−0.32 m w.e. a−1. The annual rate of mass change during the
post-LIA period was most negative in 2002–2010, on average
−1.34 ± 0.12 m w.e. a−1, which is among the most negative
mass balance values recorded worldwide in the early 21st century.
| Reference Key |
hannesdttir2015thechanges
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|---|---|
| Authors | ;H. Hannesdóttir;H. Björnsson;F. Pálsson;G. Aðalgeirsdóttir;Sv. Guðmundsson |
| Journal | journal of applied polymer science |
| Year | 2015 |
| DOI |
10.5194/tc-9-565-2015
|
| URL | |
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