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Site-level model intercomparison of high latitude and high altitude soil thermal dynamics in tundra and barren landscapes

Ekici, A.; Chadburn, S.; Chaudhary, Nitin LU ; Hajdu, L. H.; Marmy, A.; Peng, S.; Boike, J.; Burke, E.; Friend, A. D. and Hauck, C., et al. (2015) In The Cryosphere 9(4). p.1343-1361
Abstract
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... (More)
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. (Less)
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published
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in
The Cryosphere
volume
9
issue
4
pages
1343 - 1361
publisher
Copernicus Gesellschaft Mbh
external identifiers
  • wos:000360661700002
  • scopus:84937774592
ISSN
1994-0424
DOI
10.5194/tc-9-1343-2015
language
English
LU publication?
yes
id
dbb1a2cb-559e-47a4-ae37-0799fe50b4f6 (old id 8080578)
date added to LUP
2015-10-20 11:40:41
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2017-10-22 03:15:49
@article{dbb1a2cb-559e-47a4-ae37-0799fe50b4f6,
  abstract     = {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.},
  author       = {Ekici, A. and Chadburn, S. and Chaudhary, Nitin and Hajdu, L. H. and Marmy, A. and Peng, S. and Boike, J. and Burke, E. and Friend, A. D. and Hauck, C. and Krinner, G. and Langer, M. and Miller, Paul and Beer, C.},
  issn         = {1994-0424},
  language     = {eng},
  number       = {4},
  pages        = {1343--1361},
  publisher    = {Copernicus Gesellschaft Mbh},
  series       = {The Cryosphere},
  title        = {Site-level model intercomparison of high latitude and high altitude soil thermal dynamics in tundra and barren landscapes},
  url          = {http://dx.doi.org/10.5194/tc-9-1343-2015},
  volume       = {9},
  year         = {2015},
}