Understanding snow bedform formation by adding sintering to a cellular automata model
Cellular-automata-based modelling for simulating snow bedforms and snow deposition is introduced in this study. The well-known ReSCAL model, previously used for sand bedforms, is adapted for this purpose by implementing a simple sintering mechanism. The effect of sintering is first explored for soli...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2019
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Online Access: | https://doi.org/10.5194/tc-13-3239-2019 https://www.the-cryosphere.net/13/3239/2019/tc-13-3239-2019.pdf https://doaj.org/article/cceac27a6e11449a8fd1cd74ea683950 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:cceac27a6e11449a8fd1cd74ea683950 2023-05-15T18:32:19+02:00 Understanding snow bedform formation by adding sintering to a cellular automata model V. Sharma L. Braud M. Lehning 2019-12-01 https://doi.org/10.5194/tc-13-3239-2019 https://www.the-cryosphere.net/13/3239/2019/tc-13-3239-2019.pdf https://doaj.org/article/cceac27a6e11449a8fd1cd74ea683950 en eng Copernicus Publications doi:10.5194/tc-13-3239-2019 1994-0416 1994-0424 https://www.the-cryosphere.net/13/3239/2019/tc-13-3239-2019.pdf https://doaj.org/article/cceac27a6e11449a8fd1cd74ea683950 undefined The Cryosphere, Vol 13, Pp 3239-3260 (2019) geo archeo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.5194/tc-13-3239-2019 2023-01-22T17:50:33Z Cellular-automata-based modelling for simulating snow bedforms and snow deposition is introduced in this study. The well-known ReSCAL model, previously used for sand bedforms, is adapted for this purpose by implementing a simple sintering mechanism. The effect of sintering is first explored for solitary barchan dunes of different sizes and flow conditions. Three types of behaviour are observed: small barchans continue their motion without any perceptible difference while large barchans sinter immediately. Barchans of intermediate size split, leaving behind a sintered core and a smaller barchan is formed. It is found that sintering introduces an upper limit to the size of bedforms that can remain mobile. The concept of “maximum streamwise length” (MSL) is introduced and MSL is identified for different wind speeds using the solitary dune scenario. Simulations of the full evolution from an initially flat snow layer to a complex dune field are performed next. It is found that the largest bedforms lie below the MSL threshold. Additionally, it is found that shallow snow layers are most susceptible to mechanical destabilization by the wind. Article in Journal/Newspaper The Cryosphere Barchans Unknown Barchans ENVELOPE(-64.333,-64.333,-65.233,-65.233) The Cryosphere 13 12 3239 3260 |
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Open Polar |
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Unknown |
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fttriple |
language |
English |
topic |
geo archeo |
spellingShingle |
geo archeo V. Sharma L. Braud M. Lehning Understanding snow bedform formation by adding sintering to a cellular automata model |
topic_facet |
geo archeo |
description |
Cellular-automata-based modelling for simulating snow bedforms and snow deposition is introduced in this study. The well-known ReSCAL model, previously used for sand bedforms, is adapted for this purpose by implementing a simple sintering mechanism. The effect of sintering is first explored for solitary barchan dunes of different sizes and flow conditions. Three types of behaviour are observed: small barchans continue their motion without any perceptible difference while large barchans sinter immediately. Barchans of intermediate size split, leaving behind a sintered core and a smaller barchan is formed. It is found that sintering introduces an upper limit to the size of bedforms that can remain mobile. The concept of “maximum streamwise length” (MSL) is introduced and MSL is identified for different wind speeds using the solitary dune scenario. Simulations of the full evolution from an initially flat snow layer to a complex dune field are performed next. It is found that the largest bedforms lie below the MSL threshold. Additionally, it is found that shallow snow layers are most susceptible to mechanical destabilization by the wind. |
format |
Article in Journal/Newspaper |
author |
V. Sharma L. Braud M. Lehning |
author_facet |
V. Sharma L. Braud M. Lehning |
author_sort |
V. Sharma |
title |
Understanding snow bedform formation by adding sintering to a cellular automata model |
title_short |
Understanding snow bedform formation by adding sintering to a cellular automata model |
title_full |
Understanding snow bedform formation by adding sintering to a cellular automata model |
title_fullStr |
Understanding snow bedform formation by adding sintering to a cellular automata model |
title_full_unstemmed |
Understanding snow bedform formation by adding sintering to a cellular automata model |
title_sort |
understanding snow bedform formation by adding sintering to a cellular automata model |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-3239-2019 https://www.the-cryosphere.net/13/3239/2019/tc-13-3239-2019.pdf https://doaj.org/article/cceac27a6e11449a8fd1cd74ea683950 |
long_lat |
ENVELOPE(-64.333,-64.333,-65.233,-65.233) |
geographic |
Barchans |
geographic_facet |
Barchans |
genre |
The Cryosphere Barchans |
genre_facet |
The Cryosphere Barchans |
op_source |
The Cryosphere, Vol 13, Pp 3239-3260 (2019) |
op_relation |
doi:10.5194/tc-13-3239-2019 1994-0416 1994-0424 https://www.the-cryosphere.net/13/3239/2019/tc-13-3239-2019.pdf https://doaj.org/article/cceac27a6e11449a8fd1cd74ea683950 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-13-3239-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
12 |
container_start_page |
3239 |
op_container_end_page |
3260 |
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1766216414282121216 |