Impact of measured and simulated tundra snowpack properties on heat transfer
Snowpack microstructure controls the transfer of heat to, as well as the temperature of, the underlying soils. In situ measurements of snow and soil properties from four field campaigns during two winters (March and November 2018, January and March 2019) were compared to an ensemble of CLM5.0 (Commu...
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Online Access: | https://doi.org/10.5194/tc-16-4201-2022 https://tc.copernicus.org/articles/16/4201/2022/ |
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ftcopernicus:oai:publications.copernicus.org:tc98070 2023-05-15T17:46:45+02:00 Impact of measured and simulated tundra snowpack properties on heat transfer Dutch, Victoria R. Rutter, Nick Wake, Leanne Sandells, Melody Derksen, Chris Walker, Branden Hould Gosselin, Gabriel Sonnentag, Oliver Essery, Richard Kelly, Richard Marsh, Phillip King, Joshua Boike, Julia 2022-10-11 application/pdf https://doi.org/10.5194/tc-16-4201-2022 https://tc.copernicus.org/articles/16/4201/2022/ eng eng doi:10.5194/tc-16-4201-2022 https://tc.copernicus.org/articles/16/4201/2022/ eISSN: 1994-0424 Text 2022 ftcopernicus https://doi.org/10.5194/tc-16-4201-2022 2022-10-17T16:22:44Z Snowpack microstructure controls the transfer of heat to, as well as the temperature of, the underlying soils. In situ measurements of snow and soil properties from four field campaigns during two winters (March and November 2018, January and March 2019) were compared to an ensemble of CLM5.0 (Community Land Model) simulations, at Trail Valley Creek, Northwest Territories, Canada. Snow micropenetrometer profiles allowed for snowpack density and thermal conductivity to be derived at higher vertical resolution (1.25 mm) and a larger sample size ( n =1050 ) compared to traditional snowpit observations (3 cm vertical resolution; n =115 ). Comparing measurements with simulations shows CLM overestimated snow thermal conductivity by a factor of 3, leading to a cold bias in wintertime soil temperatures ( RMSE=5.8 ∘ C). Two different approaches were taken to reduce this bias: alternative parameterisations of snow thermal conductivity and the application of a correction factor. All the evaluated parameterisations of snow thermal conductivity improved simulations of wintertime soil temperatures, with that of Sturm et al. (1997) having the greatest impact ( RMSE=2.5 ∘ C). The required correction factor is strongly related to snow depth ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M7" display="inline" overflow="scroll" dspmath="mathml"><mrow><msup><mi>R</mi><mn mathvariant="normal">2</mn></msup><mo>=</mo><mn mathvariant="normal">0.77</mn><mo>,</mo><mi mathvariant="normal">RMSE</mi><mo>=</mo><mn mathvariant="normal">0.066</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="125pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="43542648a66c7c68c7e864927fbc13df"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-4201-2022-ie00001.svg" width="125pt" height="15pt" src="tc-16-4201-2022-ie00001.png"/></svg:svg> ) and ... Text Northwest Territories Tundra Copernicus Publications: E-Journals Canada Northwest Territories Sturm ENVELOPE(162.967,162.967,-71.050,-71.050) Trail Valley Creek ENVELOPE(-133.415,-133.415,68.772,68.772) Valley Creek ENVELOPE(-138.324,-138.324,63.326,63.326) The Cryosphere 16 10 4201 4222 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Snowpack microstructure controls the transfer of heat to, as well as the temperature of, the underlying soils. In situ measurements of snow and soil properties from four field campaigns during two winters (March and November 2018, January and March 2019) were compared to an ensemble of CLM5.0 (Community Land Model) simulations, at Trail Valley Creek, Northwest Territories, Canada. Snow micropenetrometer profiles allowed for snowpack density and thermal conductivity to be derived at higher vertical resolution (1.25 mm) and a larger sample size ( n =1050 ) compared to traditional snowpit observations (3 cm vertical resolution; n =115 ). Comparing measurements with simulations shows CLM overestimated snow thermal conductivity by a factor of 3, leading to a cold bias in wintertime soil temperatures ( RMSE=5.8 ∘ C). Two different approaches were taken to reduce this bias: alternative parameterisations of snow thermal conductivity and the application of a correction factor. All the evaluated parameterisations of snow thermal conductivity improved simulations of wintertime soil temperatures, with that of Sturm et al. (1997) having the greatest impact ( RMSE=2.5 ∘ C). The required correction factor is strongly related to snow depth ( <math xmlns="http://www.w3.org/1998/Math/MathML" id="M7" display="inline" overflow="scroll" dspmath="mathml"><mrow><msup><mi>R</mi><mn mathvariant="normal">2</mn></msup><mo>=</mo><mn mathvariant="normal">0.77</mn><mo>,</mo><mi mathvariant="normal">RMSE</mi><mo>=</mo><mn mathvariant="normal">0.066</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="125pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="43542648a66c7c68c7e864927fbc13df"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-16-4201-2022-ie00001.svg" width="125pt" height="15pt" src="tc-16-4201-2022-ie00001.png"/></svg:svg> ) and ... |
format |
Text |
author |
Dutch, Victoria R. Rutter, Nick Wake, Leanne Sandells, Melody Derksen, Chris Walker, Branden Hould Gosselin, Gabriel Sonnentag, Oliver Essery, Richard Kelly, Richard Marsh, Phillip King, Joshua Boike, Julia |
spellingShingle |
Dutch, Victoria R. Rutter, Nick Wake, Leanne Sandells, Melody Derksen, Chris Walker, Branden Hould Gosselin, Gabriel Sonnentag, Oliver Essery, Richard Kelly, Richard Marsh, Phillip King, Joshua Boike, Julia Impact of measured and simulated tundra snowpack properties on heat transfer |
author_facet |
Dutch, Victoria R. Rutter, Nick Wake, Leanne Sandells, Melody Derksen, Chris Walker, Branden Hould Gosselin, Gabriel Sonnentag, Oliver Essery, Richard Kelly, Richard Marsh, Phillip King, Joshua Boike, Julia |
author_sort |
Dutch, Victoria R. |
title |
Impact of measured and simulated tundra snowpack properties on heat transfer |
title_short |
Impact of measured and simulated tundra snowpack properties on heat transfer |
title_full |
Impact of measured and simulated tundra snowpack properties on heat transfer |
title_fullStr |
Impact of measured and simulated tundra snowpack properties on heat transfer |
title_full_unstemmed |
Impact of measured and simulated tundra snowpack properties on heat transfer |
title_sort |
impact of measured and simulated tundra snowpack properties on heat transfer |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-4201-2022 https://tc.copernicus.org/articles/16/4201/2022/ |
long_lat |
ENVELOPE(162.967,162.967,-71.050,-71.050) ENVELOPE(-133.415,-133.415,68.772,68.772) ENVELOPE(-138.324,-138.324,63.326,63.326) |
geographic |
Canada Northwest Territories Sturm Trail Valley Creek Valley Creek |
geographic_facet |
Canada Northwest Territories Sturm Trail Valley Creek Valley Creek |
genre |
Northwest Territories Tundra |
genre_facet |
Northwest Territories Tundra |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-16-4201-2022 https://tc.copernicus.org/articles/16/4201/2022/ |
op_doi |
https://doi.org/10.5194/tc-16-4201-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
10 |
container_start_page |
4201 |
op_container_end_page |
4222 |
_version_ |
1766150570406576128 |