Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component
Abstract The sea ice component of the Community Earth System Model version 2 (CESM2) contains new “mushy‐layer” physics that simulates prognostic salinity in the sea ice, with consequent modifications to sea ice thermodynamics and the treatment of melt ponds. The changes to the sea ice model and the...
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American Geophysical Union (AGU)
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ftdoajarticles:oai:doaj.org/article:f793d56c7c5742c8ad57d0e40372a06b 2023-05-15T13:11:56+02:00 Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component David A. Bailey Marika M. Holland Alice K. DuVivier Elizabeth C. Hunke Adrian K. Turner 2020-11-01T00:00:00Z https://doi.org/10.1029/2020MS002154 https://doaj.org/article/f793d56c7c5742c8ad57d0e40372a06b EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2020MS002154 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2020MS002154 https://doaj.org/article/f793d56c7c5742c8ad57d0e40372a06b Journal of Advances in Modeling Earth Systems, Vol 12, Iss 11, Pp n/a-n/a (2020) coupled Earth system model sea ice modeling Physical geography GB3-5030 Oceanography GC1-1581 article 2020 ftdoajarticles https://doi.org/10.1029/2020MS002154 2022-12-31T05:24:47Z Abstract The sea ice component of the Community Earth System Model version 2 (CESM2) contains new “mushy‐layer” physics that simulates prognostic salinity in the sea ice, with consequent modifications to sea ice thermodynamics and the treatment of melt ponds. The changes to the sea ice model and their influence on coupled model simulations are described here. Two simulations were performed to assess the changes in the vertical thermodynamics formulation with prognostic salinity compared to a constant salinity profile. Inclusion of the mushy layer thermodynamics of Turner et al. (2013, https://doi.org/10.1002/jgrc.20171) in a fully coupled Earth system model produces thicker and more extensive sea ice in the Arctic, with relatively unchanged sea ice in the Antarctic compared to simulations using a constant salinity profile. While this is consistent with the findings of uncoupled ice‐ocean model studies, the role of the frazil and congelation growth is more important in fully coupled simulations. Melt pond drainage is also an important contribution to simulated ice thickness differences as also found in the uncoupled simulations of Turner and Hunke (2015; https://doi.org/10.1002/2014JC010358). However, it is an interaction of the ponds and the snow fraction that impacts the surface albedo and hence the top melt. The changes in the thermodynamics and resulting ice state modify the ice‐ocean‐atmosphere fluxes with impacts on the atmosphere and ocean states, particularly temperature. Article in Journal/Newspaper albedo Antarc* Antarctic Arctic Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Antarctic The Antarctic Journal of Advances in Modeling Earth Systems 12 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
coupled Earth system model sea ice modeling Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
coupled Earth system model sea ice modeling Physical geography GB3-5030 Oceanography GC1-1581 David A. Bailey Marika M. Holland Alice K. DuVivier Elizabeth C. Hunke Adrian K. Turner Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
topic_facet |
coupled Earth system model sea ice modeling Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract The sea ice component of the Community Earth System Model version 2 (CESM2) contains new “mushy‐layer” physics that simulates prognostic salinity in the sea ice, with consequent modifications to sea ice thermodynamics and the treatment of melt ponds. The changes to the sea ice model and their influence on coupled model simulations are described here. Two simulations were performed to assess the changes in the vertical thermodynamics formulation with prognostic salinity compared to a constant salinity profile. Inclusion of the mushy layer thermodynamics of Turner et al. (2013, https://doi.org/10.1002/jgrc.20171) in a fully coupled Earth system model produces thicker and more extensive sea ice in the Arctic, with relatively unchanged sea ice in the Antarctic compared to simulations using a constant salinity profile. While this is consistent with the findings of uncoupled ice‐ocean model studies, the role of the frazil and congelation growth is more important in fully coupled simulations. Melt pond drainage is also an important contribution to simulated ice thickness differences as also found in the uncoupled simulations of Turner and Hunke (2015; https://doi.org/10.1002/2014JC010358). However, it is an interaction of the ponds and the snow fraction that impacts the surface albedo and hence the top melt. The changes in the thermodynamics and resulting ice state modify the ice‐ocean‐atmosphere fluxes with impacts on the atmosphere and ocean states, particularly temperature. |
format |
Article in Journal/Newspaper |
author |
David A. Bailey Marika M. Holland Alice K. DuVivier Elizabeth C. Hunke Adrian K. Turner |
author_facet |
David A. Bailey Marika M. Holland Alice K. DuVivier Elizabeth C. Hunke Adrian K. Turner |
author_sort |
David A. Bailey |
title |
Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
title_short |
Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
title_full |
Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
title_fullStr |
Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
title_full_unstemmed |
Impact of a New Sea Ice Thermodynamic Formulation in the CESM2 Sea Ice Component |
title_sort |
impact of a new sea ice thermodynamic formulation in the cesm2 sea ice component |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020MS002154 https://doaj.org/article/f793d56c7c5742c8ad57d0e40372a06b |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
albedo Antarc* Antarctic Arctic Sea ice |
genre_facet |
albedo Antarc* Antarctic Arctic Sea ice |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 12, Iss 11, Pp n/a-n/a (2020) |
op_relation |
https://doi.org/10.1029/2020MS002154 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2020MS002154 https://doaj.org/article/f793d56c7c5742c8ad57d0e40372a06b |
op_doi |
https://doi.org/10.1029/2020MS002154 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
12 |
container_issue |
11 |
_version_ |
1766249528474730496 |