Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme
Abstract The model Soil‐Litter‐Iso (SLI) calculates coupled heat and water transport in soil. It was recently implemented into the Australian land surface model CABLE, which is the land component of the Australian Community Climate and Earth System Simulator (ACCESS). Here we extended SLI to include...
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| Format: | Article |
| Language: | English |
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American Geophysical Union (AGU)
2018-01-01
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| Series: | Journal of Advances in Modeling Earth Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/2017MS001100 |
| _version_ | 1818360853275082752 |
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| author | Matthias Cuntz Vanessa Haverd |
| author_facet | Matthias Cuntz Vanessa Haverd |
| author_sort | Matthias Cuntz |
| collection | DOAJ |
| description | Abstract The model Soil‐Litter‐Iso (SLI) calculates coupled heat and water transport in soil. It was recently implemented into the Australian land surface model CABLE, which is the land component of the Australian Community Climate and Earth System Simulator (ACCESS). Here we extended SLI to include accurate freeze‐thaw processes in the soil and snow. SLI provides thence an implicit solution of the energy and water balances of soil and snow as a standalone model and within CABLE. The enhanced SLI was tested extensively against theoretical formulations, laboratory experiments, field data, and satellite retrievals. The model performed well for all experiments at wide‐ranging temporal and spatial scales. SLI melts snow faster at the end of the cold season compared to observations though because there is no subgrid variability within SLI given by the implicit, coupled solution of energy and water. Combined CABLE‐SLI shows very realistic dynamics and extent of permafrost on the Northern hemisphere. It illustrated, however, also the limits of possible comparisons between large‐scale land surface models and local permafrost observations. CABLE‐SLI exhibits the same patterns of snow depth and snow water equivalent on the Northern hemisphere compared to satellite‐derived observations but quantitative comparisons depend largely on the given meteorological input fields. Further extension of CABLE‐SLI with depth‐dependence of soil carbon will allow realistic projections of the development of permafrost and frozen carbon stocks in a changing climate. |
| first_indexed | 2024-12-13T21:07:23Z |
| format | Article |
| id | doaj.art-f53d10814a264001bdf862a62f6855df |
| institution | Directory Open Access Journal |
| issn | 1942-2466 |
| language | English |
| last_indexed | 2024-12-13T21:07:23Z |
| publishDate | 2018-01-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Journal of Advances in Modeling Earth Systems |
| spelling | doaj.art-f53d10814a264001bdf862a62f6855df2022-12-21T23:31:27ZengAmerican Geophysical Union (AGU)Journal of Advances in Modeling Earth Systems1942-24662018-01-01101547710.1002/2017MS001100Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface SchemeMatthias Cuntz0Vanessa Haverd1INRA, Université de Lorraine, UMR1137 Ecologie et Ecophysiologie ForestièresChampenoux FranceCSIRO Oceans and AtmosphereCanberra ACT AustraliaAbstract The model Soil‐Litter‐Iso (SLI) calculates coupled heat and water transport in soil. It was recently implemented into the Australian land surface model CABLE, which is the land component of the Australian Community Climate and Earth System Simulator (ACCESS). Here we extended SLI to include accurate freeze‐thaw processes in the soil and snow. SLI provides thence an implicit solution of the energy and water balances of soil and snow as a standalone model and within CABLE. The enhanced SLI was tested extensively against theoretical formulations, laboratory experiments, field data, and satellite retrievals. The model performed well for all experiments at wide‐ranging temporal and spatial scales. SLI melts snow faster at the end of the cold season compared to observations though because there is no subgrid variability within SLI given by the implicit, coupled solution of energy and water. Combined CABLE‐SLI shows very realistic dynamics and extent of permafrost on the Northern hemisphere. It illustrated, however, also the limits of possible comparisons between large‐scale land surface models and local permafrost observations. CABLE‐SLI exhibits the same patterns of snow depth and snow water equivalent on the Northern hemisphere compared to satellite‐derived observations but quantitative comparisons depend largely on the given meteorological input fields. Further extension of CABLE‐SLI with depth‐dependence of soil carbon will allow realistic projections of the development of permafrost and frozen carbon stocks in a changing climate.https://doi.org/10.1002/2017MS001100SLICABLEfreeze/thawpermafrostenergy balance |
| spellingShingle | Matthias Cuntz Vanessa Haverd Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme Journal of Advances in Modeling Earth Systems SLI CABLE freeze/thaw permafrost energy balance |
| title | Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme |
| title_full | Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme |
| title_fullStr | Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme |
| title_full_unstemmed | Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme |
| title_short | Physically Accurate Soil Freeze‐Thaw Processes in a Global Land Surface Scheme |
| title_sort | physically accurate soil freeze thaw processes in a global land surface scheme |
| topic | SLI CABLE freeze/thaw permafrost energy balance |
| url | https://doi.org/10.1002/2017MS001100 |
| work_keys_str_mv | AT matthiascuntz physicallyaccuratesoilfreezethawprocessesinagloballandsurfacescheme AT vanessahaverd physicallyaccuratesoilfreezethawprocessesinagloballandsurfacescheme |