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| Titel |
Response of the ice cap Hardangerjøkulen in southern Norway to the 20th and 21st century climates |
| VerfasserIn |
R. H. Giesen, J. Oerlemans  |
| 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 ; 4, no. 2 ; Nr. 4, no. 2 (2010-05-12), S.191-213 |
| Datensatznummer |
250001647
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| Publikation (Nr.) |
 copernicus.org/tc-4-191-2010.pdf |
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| Zusammenfassung |
| Glaciers respond to mass balance changes by adjusting their surface elevation
and area. These properties in their turn affect the local and area-averaged
mass balance. To incorporate this interdependence in the response of glaciers
to climate change, models should include an interactive scheme coupling mass
balance and ice dynamics. In this study, a spatially distributed mass balance
model, comprising surface energy balance calculations, was coupled to a
vertically integrated ice-flow model based on the shallow ice approximation.
The coupled model was applied to the ice cap Hardangerjøkulen in southern
Norway. The available glacio-meteorological records, mass balance and glacier
length change measurements were utilized for model calibration and
validation. Forced with meteorological data from nearby synoptic weather
stations, the coupled model realistically simulated the observed mass balance
and glacier length changes during the 20th century. The mean climate for the
period 1961–1990, computed from local meteorological data, was used as a
basis to prescribe climate projections for the 21st century at
Hardangerjøkulen. For a linear temperature increase of 3 °C from
1961–1990 to 2071–2100, the modelled net mass balance soon becomes negative
at all altitudes and Hardangerjøkulen disappears around the year 2100. The
projected changes in the other meteorological variables could at most partly
compensate for the effect of the projected warming. |
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