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| Titel |
Site-level model intercomparison of high latitude and high altitude soil thermal dynamics in tundra and barren landscapes |
| VerfasserIn |
A. Ekici, S. Chadburn, N. Chaudhary, L. H. Hajdu, A. Marmy, S. Peng, J. Boike, E. Burke, A. D. Friend, C. Hauck, G. Krinner, M. Langer, P. A. Miller, C. Beer |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2015-07-22), S.1343-1361 |
| Datensatznummer |
250116820
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| Publikation (Nr.) |
 copernicus.org/tc-9-1343-2015.pdf |
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| Zusammenfassung |
| Modeling soil
thermal dynamics at high latitudes and altitudes requires
representations of physical processes such as snow insulation, soil freezing
and thawing and subsurface conditions like soil water/ice content and soil
texture. We have compared six different land models: JSBACH, ORCHIDEE, JULES,
COUP, HYBRID8 and LPJ-GUESS, at four different sites with distinct cold
region landscape types, to identify the importance of physical processes in
capturing observed temperature dynamics in soils. The sites include alpine,
high Arctic, wet polygonal tundra and non-permafrost Arctic, thus showing how
a range of models can represent distinct soil temperature regimes. For all
sites, snow insulation is of major importance for estimating topsoil
conditions. However, soil physics is essential for the subsoil temperature
dynamics and thus the active layer thicknesses. This analysis shows that land
models need more realistic surface processes, such as detailed snow dynamics
and moss cover with changing thickness and wetness, along with better
representations of subsoil thermal dynamics. |
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