A 1-D modelling study of Arctic sea-ice salinity
We use a 1-D model to study how salinity evolves in Arctic sea ice. To do so, we first explore how sea-ice surface melt and flooding can be incorporated into the 1-D thermodynamic Semi-Adaptive Multi-phase Sea-Ice Model (SAMSIM) presented by Griewank and Notz (2013). We introduce flooding and a flus...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2015
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Online Access: | https://doi.org/10.5194/tc-9-305-2015 http://www.the-cryosphere.net/9/305/2015/tc-9-305-2015.pdf https://doaj.org/article/4e353081ec194c1e8893fe57410f2a38 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:4e353081ec194c1e8893fe57410f2a38 2023-05-15T14:48:08+02:00 A 1-D modelling study of Arctic sea-ice salinity P. J. Griewank D. Notz 2015-02-01 https://doi.org/10.5194/tc-9-305-2015 http://www.the-cryosphere.net/9/305/2015/tc-9-305-2015.pdf https://doaj.org/article/4e353081ec194c1e8893fe57410f2a38 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-9-305-2015 http://www.the-cryosphere.net/9/305/2015/tc-9-305-2015.pdf https://doaj.org/article/4e353081ec194c1e8893fe57410f2a38 undefined The Cryosphere, Vol 9, Iss 1, Pp 305-329 (2015) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.5194/tc-9-305-2015 2023-01-22T18:19:22Z We use a 1-D model to study how salinity evolves in Arctic sea ice. To do so, we first explore how sea-ice surface melt and flooding can be incorporated into the 1-D thermodynamic Semi-Adaptive Multi-phase Sea-Ice Model (SAMSIM) presented by Griewank and Notz (2013). We introduce flooding and a flushing parametrization which treats sea ice as a hydraulic network of horizontal and vertical fluxes. Forcing SAMSIM with 36 years of ERA-interim atmospheric reanalysis data, we obtain a modelled Arctic sea-ice salinity that agrees well with ice-core measurements. The simulations thus allow us to identify the main drivers of the observed mean salinity profile in Arctic sea ice. Our results show a 1.5–4 g kg−1 decrease of bulk salinity via gravity drainage after ice growth has ceased and before flushing sets in, which hinders approximating bulk salinity from ice thickness beyond the first growth season. In our simulations, salinity interannual variability of first-year ice is mostly restricted to the top 20 cm. We find that ice thickness, thermal resistivity, freshwater column, and stored energy change by less than 5% on average when the full salinity parametrization is replaced with a prescribed salinity profile. Article in Journal/Newspaper Arctic ice core Sea ice The Cryosphere Unknown Arctic The Cryosphere 9 1 305 329 |
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English |
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geo envir |
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geo envir P. J. Griewank D. Notz A 1-D modelling study of Arctic sea-ice salinity |
topic_facet |
geo envir |
description |
We use a 1-D model to study how salinity evolves in Arctic sea ice. To do so, we first explore how sea-ice surface melt and flooding can be incorporated into the 1-D thermodynamic Semi-Adaptive Multi-phase Sea-Ice Model (SAMSIM) presented by Griewank and Notz (2013). We introduce flooding and a flushing parametrization which treats sea ice as a hydraulic network of horizontal and vertical fluxes. Forcing SAMSIM with 36 years of ERA-interim atmospheric reanalysis data, we obtain a modelled Arctic sea-ice salinity that agrees well with ice-core measurements. The simulations thus allow us to identify the main drivers of the observed mean salinity profile in Arctic sea ice. Our results show a 1.5–4 g kg−1 decrease of bulk salinity via gravity drainage after ice growth has ceased and before flushing sets in, which hinders approximating bulk salinity from ice thickness beyond the first growth season. In our simulations, salinity interannual variability of first-year ice is mostly restricted to the top 20 cm. We find that ice thickness, thermal resistivity, freshwater column, and stored energy change by less than 5% on average when the full salinity parametrization is replaced with a prescribed salinity profile. |
format |
Article in Journal/Newspaper |
author |
P. J. Griewank D. Notz |
author_facet |
P. J. Griewank D. Notz |
author_sort |
P. J. Griewank |
title |
A 1-D modelling study of Arctic sea-ice salinity |
title_short |
A 1-D modelling study of Arctic sea-ice salinity |
title_full |
A 1-D modelling study of Arctic sea-ice salinity |
title_fullStr |
A 1-D modelling study of Arctic sea-ice salinity |
title_full_unstemmed |
A 1-D modelling study of Arctic sea-ice salinity |
title_sort |
1-d modelling study of arctic sea-ice salinity |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-305-2015 http://www.the-cryosphere.net/9/305/2015/tc-9-305-2015.pdf https://doaj.org/article/4e353081ec194c1e8893fe57410f2a38 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic ice core Sea ice The Cryosphere |
genre_facet |
Arctic ice core Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 1, Pp 305-329 (2015) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-9-305-2015 http://www.the-cryosphere.net/9/305/2015/tc-9-305-2015.pdf https://doaj.org/article/4e353081ec194c1e8893fe57410f2a38 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-9-305-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
1 |
container_start_page |
305 |
op_container_end_page |
329 |
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1766319223492050944 |