Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway
Abstract. Ground temperatures in coarse, blocky deposits such as mountain blockfields and rock glaciers have long been observed to be lower in comparison with other (sub)surface material. One of the reasons for this negative temperature anomaly is the lower soil moisture content in blocky terrain, w...
Published in: | Earth Surface Dynamics |
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Language: | English |
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Copernicus Publications under license by EGU – European Geosciences Union GmbH
2023
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Online Access: | http://hdl.handle.net/10852/100132 https://doi.org/10.5194/esurf-11-33-2023 |
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ftoslouniv:oai:www.duo.uio.no:10852/100132 2023-05-15T16:21:59+02:00 Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway ENEngelskEnglishSimulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian 2023-02-06T09:23:41Z http://hdl.handle.net/10852/100132 https://doi.org/10.5194/esurf-11-33-2023 EN eng Copernicus Publications under license by EGU – European Geosciences Union GmbH ESA/Permafrost_CCI Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian . Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway. Earth Surface Dynamics. 2023 http://hdl.handle.net/10852/100132 2123163 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Earth Surface Dynamics&rft.volume=&rft.spage=&rft.date=2023 Earth Surface Dynamics 11 1 33 50 https://doi.org/10.5194/esurf-11-33-2023 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2196-6311 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2023 ftoslouniv https://doi.org/10.5194/esurf-11-33-2023 2023-02-22T23:36:45Z Abstract. Ground temperatures in coarse, blocky deposits such as mountain blockfields and rock glaciers have long been observed to be lower in comparison with other (sub)surface material. One of the reasons for this negative temperature anomaly is the lower soil moisture content in blocky terrain, which decreases the duration of the zero curtain in autumn. Here we used the CryoGrid community model to simulate the effect of drainage on the ground thermal regime and ground ice in blocky terrain permafrost at two sites in Norway. The model set-up is based on a one-dimensional model domain and features a surface energy balance, heat conduction and advection, as well as a bucket water scheme with adjustable lateral drainage. We used three idealized subsurface stratigraphies, blocks only, blocks with sediment and sediment only, which can be either drained (i.e. with strong lateral subsurface drainage) or undrained (i.e. without drainage), resulting in six scenarios. The main difference between the three stratigraphies is their ability to retain water against drainage: while the blocks only stratigraphy can only hold small amounts of water, much more water is retained within the sediment phase of the two other stratigraphies, which critically modifies the freeze–thaw behaviour. The simulation results show markedly lower ground temperatures in the blocks only, drained scenario compared to other scenarios, with a negative thermal anomaly of up to 2.2 ∘C. For this scenario, the model can in particular simulate the time evolution of ground ice, with build-up during and after snowmelt and spring and gradual lowering of the ice table in the course of the summer season. The thermal anomaly increases with larger amounts of snowfall, showing that well-drained blocky deposits are less sensitive to insulation by snow than other soils. We simulate stable permafrost conditions at the location of a rock glacier in northern Norway with a mean annual ground surface temperature of 2.0–2.5 ∘C in the blocks only, drained simulations. ... Article in Journal/Newspaper glacier Ice Northern Norway permafrost Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Norway Earth Surface Dynamics 11 1 33 50 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Abstract. Ground temperatures in coarse, blocky deposits such as mountain blockfields and rock glaciers have long been observed to be lower in comparison with other (sub)surface material. One of the reasons for this negative temperature anomaly is the lower soil moisture content in blocky terrain, which decreases the duration of the zero curtain in autumn. Here we used the CryoGrid community model to simulate the effect of drainage on the ground thermal regime and ground ice in blocky terrain permafrost at two sites in Norway. The model set-up is based on a one-dimensional model domain and features a surface energy balance, heat conduction and advection, as well as a bucket water scheme with adjustable lateral drainage. We used three idealized subsurface stratigraphies, blocks only, blocks with sediment and sediment only, which can be either drained (i.e. with strong lateral subsurface drainage) or undrained (i.e. without drainage), resulting in six scenarios. The main difference between the three stratigraphies is their ability to retain water against drainage: while the blocks only stratigraphy can only hold small amounts of water, much more water is retained within the sediment phase of the two other stratigraphies, which critically modifies the freeze–thaw behaviour. The simulation results show markedly lower ground temperatures in the blocks only, drained scenario compared to other scenarios, with a negative thermal anomaly of up to 2.2 ∘C. For this scenario, the model can in particular simulate the time evolution of ground ice, with build-up during and after snowmelt and spring and gradual lowering of the ice table in the course of the summer season. The thermal anomaly increases with larger amounts of snowfall, showing that well-drained blocky deposits are less sensitive to insulation by snow than other soils. We simulate stable permafrost conditions at the location of a rock glacier in northern Norway with a mean annual ground surface temperature of 2.0–2.5 ∘C in the blocks only, drained simulations. ... |
format |
Article in Journal/Newspaper |
author |
Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian |
spellingShingle |
Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
author_facet |
Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian |
author_sort |
Renette, Cas |
title |
Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
title_short |
Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
title_full |
Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
title_fullStr |
Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
title_full_unstemmed |
Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway |
title_sort |
simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in norway |
publisher |
Copernicus Publications under license by EGU – European Geosciences Union GmbH |
publishDate |
2023 |
url |
http://hdl.handle.net/10852/100132 https://doi.org/10.5194/esurf-11-33-2023 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier Ice Northern Norway permafrost |
genre_facet |
glacier Ice Northern Norway permafrost |
op_source |
2196-6311 |
op_relation |
ESA/Permafrost_CCI Renette, Cas Aalstad, Kristoffer Aga, Juditha Zweigel, Robin Benjamin Etzelmüller, Bernd Lilleøren, Karianne Staalesen Isaksen, Ketil Westermann, Sebastian . Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway. Earth Surface Dynamics. 2023 http://hdl.handle.net/10852/100132 2123163 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Earth Surface Dynamics&rft.volume=&rft.spage=&rft.date=2023 Earth Surface Dynamics 11 1 33 50 https://doi.org/10.5194/esurf-11-33-2023 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/esurf-11-33-2023 |
container_title |
Earth Surface Dynamics |
container_volume |
11 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
50 |
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1766009950974246912 |