Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ...
<!--!introduction!--> The Antarctic Circumpolar Current (ACC) is shaped by westerly winds, a meridional density gradient, topography and mesoscale activity. Ekman-driven isopycnal sloping is counterbalanced by eddy mixing. Many global climate models deal with a Southern Ocean (SO) warm bias an...
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GFZ German Research Centre for Geosciences
2023
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ftdatacite:10.57757/iugg23-3802 2023-07-23T04:15:39+02:00 Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... Martin, Torge Kjellsson, Joakim Deutloff, Jakob Noack, Julia Ödalen, Malin Wahl, Sebastian Zeller, Mathias 2023 https://dx.doi.org/10.57757/iugg23-3802 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020743 unknown GFZ German Research Centre for Geosciences Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Article ConferencePaper Oral 2023 ftdatacite https://doi.org/10.57757/iugg23-3802 2023-07-03T22:08:50Z <!--!introduction!--> The Antarctic Circumpolar Current (ACC) is shaped by westerly winds, a meridional density gradient, topography and mesoscale activity. Ekman-driven isopycnal sloping is counterbalanced by eddy mixing. Many global climate models deal with a Southern Ocean (SO) warm bias and bottom water formation issues. Eddy processes are often parameterized in absence of sufficient resolution. Increasingly frequent, ocean grids at 1/4˚–1/12˚ are applied allowing for some representation of the mesoscale and eddy parameterization is thus turned off. We use FOCI, a global climate model based on ECHAM and NEMO atmosphere and ocean models with the capability of two-way nesting in the ocean to discuss related effects. Grid refinement south of 28˚S from 1/2˚ to 1/10˚ enables a realistic representation of mesoscale dynamics in the latitude band of the ACC, whereas standard GM-parameterization is applied to the non-eddying model. In both model configurations the deep, dense water layer is eroding over the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... Conference Object Antarc* Antarctic Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic |
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<!--!introduction!--> The Antarctic Circumpolar Current (ACC) is shaped by westerly winds, a meridional density gradient, topography and mesoscale activity. Ekman-driven isopycnal sloping is counterbalanced by eddy mixing. Many global climate models deal with a Southern Ocean (SO) warm bias and bottom water formation issues. Eddy processes are often parameterized in absence of sufficient resolution. Increasingly frequent, ocean grids at 1/4˚–1/12˚ are applied allowing for some representation of the mesoscale and eddy parameterization is thus turned off. We use FOCI, a global climate model based on ECHAM and NEMO atmosphere and ocean models with the capability of two-way nesting in the ocean to discuss related effects. Grid refinement south of 28˚S from 1/2˚ to 1/10˚ enables a realistic representation of mesoscale dynamics in the latitude band of the ACC, whereas standard GM-parameterization is applied to the non-eddying model. In both model configurations the deep, dense water layer is eroding over the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
format |
Conference Object |
author |
Martin, Torge Kjellsson, Joakim Deutloff, Jakob Noack, Julia Ödalen, Malin Wahl, Sebastian Zeller, Mathias |
spellingShingle |
Martin, Torge Kjellsson, Joakim Deutloff, Jakob Noack, Julia Ödalen, Malin Wahl, Sebastian Zeller, Mathias Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
author_facet |
Martin, Torge Kjellsson, Joakim Deutloff, Jakob Noack, Julia Ödalen, Malin Wahl, Sebastian Zeller, Mathias |
author_sort |
Martin, Torge |
title |
Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
title_short |
Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
title_full |
Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
title_fullStr |
Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
title_full_unstemmed |
Antarctic circumpolar current strength in the FOCI climate model: Parameterizing vs. explicitly simulating mesoscale eddies ... |
title_sort |
antarctic circumpolar current strength in the foci climate model: parameterizing vs. explicitly simulating mesoscale eddies ... |
publisher |
GFZ German Research Centre for Geosciences |
publishDate |
2023 |
url |
https://dx.doi.org/10.57757/iugg23-3802 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020743 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.57757/iugg23-3802 |
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1772176552693334016 |