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| Titel |
High-resolution interactive modelling of the mountain glacier–atmosphere interface: an application over the Karakoram |
| VerfasserIn |
E. Collier, T. Mölg, F. Maussion, D. Scherer, C. Mayer, A. B. G. Bush |
| 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. 3 ; Nr. 7, no. 3 (2013-05-06), S.779-795 |
| Datensatznummer |
250017965
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| Publikation (Nr.) |
 copernicus.org/tc-7-779-2013.pdf |
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| Zusammenfassung |
| The traditional approach to simulations of alpine glacier mass balance (MB) has been one-way, or
offline, thus precluding feedbacks from changing glacier surface conditions on the atmospheric
forcing. In addition, alpine glaciers have been only simply, if at all, represented in atmospheric
models to date. Here, we extend a recently presented, novel technique for simulating
glacier–atmosphere interactions without the need for statistical downscaling, through the use of
a coupled high-resolution mesoscale atmospheric and physically-based climatic mass balance (CMB) modelling
system that includes glacier CMB feedbacks to the atmosphere. We compare the
model results over the Karakoram region of the northwestern Himalaya with remote sensing data for the
ablation season of 2004 as well as with in situ glaciological and meteorological measurements from the
Baltoro glacier. We find that interactive coupling has a localized but appreciable impact on the near-surface
meteorological forcing data and that incorporation of CMB processes improves the simulation of
variables such as land surface temperature and snow albedo. Furthermore, including feedbacks from
the glacier model has a non-negligible effect on simulated CMB, reducing modelled ablation, on
average, by 0.1 m w.e. (−6.0%) to a total of −1.5 m w.e. between
25 June–31 August 2004. The interactively coupled model shows promise as a new, multi-scale tool
for explicitly resolving atmospheric-CMB processes of mountain glaciers at the basin scale. |
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