Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model
In this study we analyzed how an improved representation of snowpack processes and soil properties in the multilayer snow and soil schemes of the Interaction Soil-Biosphere-Atmosphere (ISBA) land surface model impacts the simulation of soil temperature profiles over northern Eurasian regions. For th...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2016-04-01
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| Series: | The Cryosphere |
| Online Access: | http://www.the-cryosphere.net/10/853/2016/tc-10-853-2016.pdf |
| _version_ | 1811212071901069312 |
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| author | B. Decharme E. Brun A. Boone C. Delire P. Le Moigne S. Morin |
| author_facet | B. Decharme E. Brun A. Boone C. Delire P. Le Moigne S. Morin |
| author_sort | B. Decharme |
| collection | DOAJ |
| description | In this study we analyzed how an improved representation of snowpack
processes and soil properties in the multilayer snow and soil schemes of
the Interaction Soil-Biosphere-Atmosphere (ISBA) land surface model impacts the simulation of soil temperature
profiles over northern Eurasian regions. For this purpose, we refine ISBA's
snow layering algorithm and propose a parameterization of snow albedo and
snow compaction/densification adapted from the detailed Crocus snowpack
model. We also include a dependency on soil organic carbon content for
ISBA's hydraulic and thermal soil properties. First, changes in the snowpack
parameterization are evaluated against snow depth, snow water equivalent,
surface albedo, and soil temperature at a 10 cm depth observed at the Col de
Porte field site in the French Alps. Next, the new model version including
all of the changes is used over northern Eurasia to evaluate the model's
ability to simulate the snow depth, the soil temperature profile, and the
permafrost characteristics. The results confirm that an adequate simulation
of snow layering and snow compaction/densification significantly impacts the
snowpack characteristics and the soil temperature profile during winter,
while the impact of the more accurate snow albedo computation is dominant
during the spring. In summer, the accounting for the effect of soil organic
carbon on hydraulic and thermal soil properties improves the simulation of
the soil temperature profile. Finally, the results confirm that this last
process strongly influences the simulation of the permafrost active layer
thickness and its spatial distribution. |
| first_indexed | 2024-04-12T05:22:50Z |
| format | Article |
| id | doaj.art-c08d7bcf16ba429097a95f513784e6b9 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-04-12T05:22:50Z |
| publishDate | 2016-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-c08d7bcf16ba429097a95f513784e6b92022-12-22T03:46:24ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242016-04-0110285387710.5194/tc-10-853-2016Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface modelB. Decharme0E. Brun1A. Boone2C. Delire3P. Le Moigne4S. Morin5GAME-CNRM – UMR3589, CNRS/Météo-France, Toulouse, FranceGAME-CNRM – UMR3589, CNRS/Météo-France, Toulouse, FranceGAME-CNRM – UMR3589, CNRS/Météo-France, Toulouse, FranceGAME-CNRM – UMR3589, CNRS/Météo-France, Toulouse, FranceGAME-CNRM – UMR3589, CNRS/Météo-France, Toulouse, FranceCEN ,GAME-CNRM – UMR3589, CNRS/Météo-France, Grenoble, FranceIn this study we analyzed how an improved representation of snowpack processes and soil properties in the multilayer snow and soil schemes of the Interaction Soil-Biosphere-Atmosphere (ISBA) land surface model impacts the simulation of soil temperature profiles over northern Eurasian regions. For this purpose, we refine ISBA's snow layering algorithm and propose a parameterization of snow albedo and snow compaction/densification adapted from the detailed Crocus snowpack model. We also include a dependency on soil organic carbon content for ISBA's hydraulic and thermal soil properties. First, changes in the snowpack parameterization are evaluated against snow depth, snow water equivalent, surface albedo, and soil temperature at a 10 cm depth observed at the Col de Porte field site in the French Alps. Next, the new model version including all of the changes is used over northern Eurasia to evaluate the model's ability to simulate the snow depth, the soil temperature profile, and the permafrost characteristics. The results confirm that an adequate simulation of snow layering and snow compaction/densification significantly impacts the snowpack characteristics and the soil temperature profile during winter, while the impact of the more accurate snow albedo computation is dominant during the spring. In summer, the accounting for the effect of soil organic carbon on hydraulic and thermal soil properties improves the simulation of the soil temperature profile. Finally, the results confirm that this last process strongly influences the simulation of the permafrost active layer thickness and its spatial distribution.http://www.the-cryosphere.net/10/853/2016/tc-10-853-2016.pdf |
| spellingShingle | B. Decharme E. Brun A. Boone C. Delire P. Le Moigne S. Morin Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model The Cryosphere |
| title | Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model |
| title_full | Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model |
| title_fullStr | Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model |
| title_full_unstemmed | Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model |
| title_short | Impacts of snow and organic soils parameterization on northern Eurasian soil temperature profiles simulated by the ISBA land surface model |
| title_sort | impacts of snow and organic soils parameterization on northern eurasian soil temperature profiles simulated by the isba land surface model |
| url | http://www.the-cryosphere.net/10/853/2016/tc-10-853-2016.pdf |
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