A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example
Paleoreconstructions suggest that during the Last Glacial Maximum (LGM) the North Atlantic circulation was noticeably different from its present state. However, the glacial salt conveyor belt is believed to be similar to the present-day's conveyor, albeit weaker and shallower because of an incr...
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1996
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ftdoajarticles:oai:doaj.org/article:665b98929d294a18b012106311a35235 2023-05-15T17:29:01+02:00 A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example D. Seidov R. Prien 1996-02-01T00:00:00Z https://doi.org/10.1007/s00585-996-0246-9 https://doaj.org/article/665b98929d294a18b012106311a35235 EN eng Copernicus Publications https://www.ann-geophys.net/14/246/1996/angeo-14-246-1996.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-996-0246-9 0992-7689 1432-0576 https://doaj.org/article/665b98929d294a18b012106311a35235 Annales Geophysicae, Vol 14, Pp 246-257 (1996) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1996 ftdoajarticles https://doi.org/10.1007/s00585-996-0246-9 2022-12-31T00:50:11Z Paleoreconstructions suggest that during the Last Glacial Maximum (LGM) the North Atlantic circulation was noticeably different from its present state. However, the glacial salt conveyor belt is believed to be similar to the present-day's conveyor, albeit weaker and shallower because of an increased freshwater flux in high-latitudes. We present here the investigation of the conveyor operation based on ocean circulation modelling using two numerical models in parallel. The GFDL primitive equation model and a planetary geostrophic model are employed to address the problem of the paleocirculation modelling in cases of uncertain and sparse data comprising the glacial surface boundary conditions. The role of different simplifications that may be used in the ocean climate studies, including the role of grid resolution, bottom topography, coast-line, etc., versus glacial-interglacial changes of the ocean surface climatology is considered. The LGM reverse conveyor gyre appeared to be the most noticeable feature of the glacial-to-interglacial alteration of the ocean circulation. The reversed upper-ocean conveyor, weaker and subducting 'normal' conveyor in the intermediate depths, and the change of the deep-ocean return flow route are robust signatures of the glacial North Atlantic climate. The results are found to be 'model-independent' and fairly insensitive to all factors other than the onset of the glacial surface conditions. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 14 2 246 257 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 D. Seidov R. Prien A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Paleoreconstructions suggest that during the Last Glacial Maximum (LGM) the North Atlantic circulation was noticeably different from its present state. However, the glacial salt conveyor belt is believed to be similar to the present-day's conveyor, albeit weaker and shallower because of an increased freshwater flux in high-latitudes. We present here the investigation of the conveyor operation based on ocean circulation modelling using two numerical models in parallel. The GFDL primitive equation model and a planetary geostrophic model are employed to address the problem of the paleocirculation modelling in cases of uncertain and sparse data comprising the glacial surface boundary conditions. The role of different simplifications that may be used in the ocean climate studies, including the role of grid resolution, bottom topography, coast-line, etc., versus glacial-interglacial changes of the ocean surface climatology is considered. The LGM reverse conveyor gyre appeared to be the most noticeable feature of the glacial-to-interglacial alteration of the ocean circulation. The reversed upper-ocean conveyor, weaker and subducting 'normal' conveyor in the intermediate depths, and the change of the deep-ocean return flow route are robust signatures of the glacial North Atlantic climate. The results are found to be 'model-independent' and fairly insensitive to all factors other than the onset of the glacial surface conditions. |
format |
Article in Journal/Newspaper |
author |
D. Seidov R. Prien |
author_facet |
D. Seidov R. Prien |
author_sort |
D. Seidov |
title |
A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
title_short |
A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
title_full |
A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
title_fullStr |
A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
title_full_unstemmed |
A coarse resolution North Atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
title_sort |
coarse resolution north atlantic ocean circulation model: an intercomparison study with a paleoceanographic example |
publisher |
Copernicus Publications |
publishDate |
1996 |
url |
https://doi.org/10.1007/s00585-996-0246-9 https://doaj.org/article/665b98929d294a18b012106311a35235 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Annales Geophysicae, Vol 14, Pp 246-257 (1996) |
op_relation |
https://www.ann-geophys.net/14/246/1996/angeo-14-246-1996.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-996-0246-9 0992-7689 1432-0576 https://doaj.org/article/665b98929d294a18b012106311a35235 |
op_doi |
https://doi.org/10.1007/s00585-996-0246-9 |
container_title |
Annales Geophysicae |
container_volume |
14 |
container_issue |
2 |
container_start_page |
246 |
op_container_end_page |
257 |
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1766122331551301632 |