Towards representing thermokarst processes in land surface models
Large-scale Earth system and land surface models often lack an adequate representation of subgrid-scale processes in permafrost landscapes. Small-scale processes such as thermokarst formation might, however, considerably impact the energy and carbon budgets in way which is not resolved within large-...
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ftawi:oai:epic.awi.de:44632 2023-05-15T16:37:18+02:00 Towards representing thermokarst processes in land surface models Nitzbon, Jan Langer, Moritz Westermann, Sebastian Grosse, Guido Boike, Julia 2017-05-24 application/pdf https://epic.awi.de/id/eprint/44632/ https://epic.awi.de/id/eprint/44632/1/Nitzbon_csdms_poster_A0_final.pdf https://hdl.handle.net/10013/epic.50914 https://hdl.handle.net/10013/epic.50914.d001 unknown https://epic.awi.de/id/eprint/44632/1/Nitzbon_csdms_poster_A0_final.pdf https://hdl.handle.net/10013/epic.50914.d001 Nitzbon, J. orcid:0000-0001-7205-6298 , Langer, M. orcid:0000-0002-2704-3655 , Westermann, S. , Grosse, G. orcid:0000-0001-5895-2141 and Boike, J. orcid:0000-0002-5875-2112 (2017) Towards representing thermokarst processes in land surface models , Community Surface Dynamics Modeling System Annual Meeting, Boulder, Colorado, USA, 23 May 2017 - 25 May 2017 . hdl:10013/epic.50914 EPIC3Community Surface Dynamics Modeling System Annual Meeting, Boulder, Colorado, USA, 2017-05-23-2017-05-25 Conference notRev 2017 ftawi 2021-12-24T15:42:58Z Large-scale Earth system and land surface models often lack an adequate representation of subgrid-scale processes in permafrost landscapes. Small-scale processes such as thermokarst formation might, however, considerably impact the energy and carbon budgets in way which is not resolved within large-scale models. Since a spatially high-resolved simulation of such processes is not feasible, novel techniques for up-scaling subgrid processes are demanded. Within this work a one-dimensional model of the ground thermal regime of land surfaces, CryoGrid 3, is employed to conceptually represent small-scale features of permafrost landscapes, particularly those related to thermokarst. For example, the model has been shown to adequately describe the degradation of permafrost underneath waterbodies in a warming climate. Using tiling approaches such point-wise realizations can be up-scaled in a statistical way in order to represent larger land surface units. The model development is closely linked to field campaigns to the Lena River Delta in Siberia which offers very diverse land surface features such as polygonal tundra and thermos-erosional valleys. These features are related to the region’s diverse soil stratigraphies, in particular the occurrence of ice-rich ground. Combining field measurements with modelling ultimately allows an improvement in the qualitative and quantitative understanding of the typical geomorphological processes in permafrost landscapes and their representation in large-scale models. Conference Object Ice lena river permafrost Thermokarst Tundra Siberia Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
Large-scale Earth system and land surface models often lack an adequate representation of subgrid-scale processes in permafrost landscapes. Small-scale processes such as thermokarst formation might, however, considerably impact the energy and carbon budgets in way which is not resolved within large-scale models. Since a spatially high-resolved simulation of such processes is not feasible, novel techniques for up-scaling subgrid processes are demanded. Within this work a one-dimensional model of the ground thermal regime of land surfaces, CryoGrid 3, is employed to conceptually represent small-scale features of permafrost landscapes, particularly those related to thermokarst. For example, the model has been shown to adequately describe the degradation of permafrost underneath waterbodies in a warming climate. Using tiling approaches such point-wise realizations can be up-scaled in a statistical way in order to represent larger land surface units. The model development is closely linked to field campaigns to the Lena River Delta in Siberia which offers very diverse land surface features such as polygonal tundra and thermos-erosional valleys. These features are related to the region’s diverse soil stratigraphies, in particular the occurrence of ice-rich ground. Combining field measurements with modelling ultimately allows an improvement in the qualitative and quantitative understanding of the typical geomorphological processes in permafrost landscapes and their representation in large-scale models. |
format |
Conference Object |
author |
Nitzbon, Jan Langer, Moritz Westermann, Sebastian Grosse, Guido Boike, Julia |
spellingShingle |
Nitzbon, Jan Langer, Moritz Westermann, Sebastian Grosse, Guido Boike, Julia Towards representing thermokarst processes in land surface models |
author_facet |
Nitzbon, Jan Langer, Moritz Westermann, Sebastian Grosse, Guido Boike, Julia |
author_sort |
Nitzbon, Jan |
title |
Towards representing thermokarst processes in land surface models |
title_short |
Towards representing thermokarst processes in land surface models |
title_full |
Towards representing thermokarst processes in land surface models |
title_fullStr |
Towards representing thermokarst processes in land surface models |
title_full_unstemmed |
Towards representing thermokarst processes in land surface models |
title_sort |
towards representing thermokarst processes in land surface models |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/44632/ https://epic.awi.de/id/eprint/44632/1/Nitzbon_csdms_poster_A0_final.pdf https://hdl.handle.net/10013/epic.50914 https://hdl.handle.net/10013/epic.50914.d001 |
genre |
Ice lena river permafrost Thermokarst Tundra Siberia |
genre_facet |
Ice lena river permafrost Thermokarst Tundra Siberia |
op_source |
EPIC3Community Surface Dynamics Modeling System Annual Meeting, Boulder, Colorado, USA, 2017-05-23-2017-05-25 |
op_relation |
https://epic.awi.de/id/eprint/44632/1/Nitzbon_csdms_poster_A0_final.pdf https://hdl.handle.net/10013/epic.50914.d001 Nitzbon, J. orcid:0000-0001-7205-6298 , Langer, M. orcid:0000-0002-2704-3655 , Westermann, S. , Grosse, G. orcid:0000-0001-5895-2141 and Boike, J. orcid:0000-0002-5875-2112 (2017) Towards representing thermokarst processes in land surface models , Community Surface Dynamics Modeling System Annual Meeting, Boulder, Colorado, USA, 23 May 2017 - 25 May 2017 . hdl:10013/epic.50914 |
_version_ |
1766027598768373760 |