The impact of a downslope water-transport parameterization in a global ocean general circulation model
The impact of a downslope water-transport parametrization on the circulation and water mass characteristics of a global depth-level ocean general circulation model is investigated. The spreading of dense water from the formation regions into the deep ocean is known to be poorly represented in depth-...
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Online Access: | http://hdl.handle.net/21.11116/0000-0003-2692-D http://hdl.handle.net/21.11116/0000-0003-269B-4 http://hdl.handle.net/21.11116/0000-0005-9577-D |
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ftpubman:oai:pure.mpg.de:item_1560273 2023-08-20T04:08:08+02:00 The impact of a downslope water-transport parameterization in a global ocean general circulation model Legutke, S. Maier-Reimer, E. 2002 application/pdf http://hdl.handle.net/21.11116/0000-0003-2692-D http://hdl.handle.net/21.11116/0000-0003-269B-4 http://hdl.handle.net/21.11116/0000-0005-9577-D eng eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-001-0202-z http://hdl.handle.net/21.11116/0000-0003-2692-D http://hdl.handle.net/21.11116/0000-0003-269B-4 http://hdl.handle.net/21.11116/0000-0005-9577-D info:eu-repo/semantics/openAccess Climate Dynamics Report / Max-Planck-Institut für Meteorologie info:eu-repo/semantics/article 2002 ftpubman https://doi.org/10.1007/s00382-001-0202-z 2023-08-01T21:38:31Z The impact of a downslope water-transport parametrization on the circulation and water mass characteristics of a global depth-level ocean general circulation model is investigated. The spreading of dense water from the formation regions into the deep ocean is known to be poorly represented in depth-level models with no bottom boundary layer resolved or attached. The new scheme is simple and intends to parametrize the effects of various oceanographic processes (rather than the processes themselves) that help dense water to descend topographic slopes by which the formation regions are separated from the world ocean. The new scheme significantly improves the large scale properties of the North Atlantic Deep Water. Changes in the North Atlantic circulation, however, are rather small. In the Southern Ocean, the exchange between the dense water formation regions on the continental shelves and the deep ocean is strengthened at the expense of deep water mass formation by open ocean convection. In all three ocean basins, the density of the deep and bottom water is higher with the new parametrization, which brings the simulations closer to observations in the Atlantic and Indian Oceans. In the Pacific Ocean, however, where the density has already been well reproduced without the downslope transport, it becomes slightly too high. The results are in agreement with those from other model studies. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Southern Ocean Max Planck Society: MPG.PuRe Indian Pacific Southern Ocean Climate Dynamics 18 7 611 623 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
The impact of a downslope water-transport parametrization on the circulation and water mass characteristics of a global depth-level ocean general circulation model is investigated. The spreading of dense water from the formation regions into the deep ocean is known to be poorly represented in depth-level models with no bottom boundary layer resolved or attached. The new scheme is simple and intends to parametrize the effects of various oceanographic processes (rather than the processes themselves) that help dense water to descend topographic slopes by which the formation regions are separated from the world ocean. The new scheme significantly improves the large scale properties of the North Atlantic Deep Water. Changes in the North Atlantic circulation, however, are rather small. In the Southern Ocean, the exchange between the dense water formation regions on the continental shelves and the deep ocean is strengthened at the expense of deep water mass formation by open ocean convection. In all three ocean basins, the density of the deep and bottom water is higher with the new parametrization, which brings the simulations closer to observations in the Atlantic and Indian Oceans. In the Pacific Ocean, however, where the density has already been well reproduced without the downslope transport, it becomes slightly too high. The results are in agreement with those from other model studies. |
format |
Article in Journal/Newspaper |
author |
Legutke, S. Maier-Reimer, E. |
spellingShingle |
Legutke, S. Maier-Reimer, E. The impact of a downslope water-transport parameterization in a global ocean general circulation model |
author_facet |
Legutke, S. Maier-Reimer, E. |
author_sort |
Legutke, S. |
title |
The impact of a downslope water-transport parameterization in a global ocean general circulation model |
title_short |
The impact of a downslope water-transport parameterization in a global ocean general circulation model |
title_full |
The impact of a downslope water-transport parameterization in a global ocean general circulation model |
title_fullStr |
The impact of a downslope water-transport parameterization in a global ocean general circulation model |
title_full_unstemmed |
The impact of a downslope water-transport parameterization in a global ocean general circulation model |
title_sort |
impact of a downslope water-transport parameterization in a global ocean general circulation model |
publishDate |
2002 |
url |
http://hdl.handle.net/21.11116/0000-0003-2692-D http://hdl.handle.net/21.11116/0000-0003-269B-4 http://hdl.handle.net/21.11116/0000-0005-9577-D |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Climate Dynamics Report / Max-Planck-Institut für Meteorologie |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-001-0202-z http://hdl.handle.net/21.11116/0000-0003-2692-D http://hdl.handle.net/21.11116/0000-0003-269B-4 http://hdl.handle.net/21.11116/0000-0005-9577-D |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00382-001-0202-z |
container_title |
Climate Dynamics |
container_volume |
18 |
container_issue |
7 |
container_start_page |
611 |
op_container_end_page |
623 |
_version_ |
1774720232177270784 |