Seasonally ice free glacial Nordic seas without deep water ventilation
At present the Nordic Seas are a key region of North Atlantic Deep Water (NADW) formation. Two alternative scenarios have been suggested by some authors for the Last Glacial Maximum: (i) the Nordic Seas were permanently covered by sea ice, preventing the formation of NADW, or (ii) that they were sea...
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BLACKWELL SCIENCE LTD
1996
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ftucl:oai:eprints.ucl.ac.uk.OAI2:101342 2023-05-15T17:13:51+02:00 Seasonally ice free glacial Nordic seas without deep water ventilation Seidov, D Maslin, M 1996 http://discovery.ucl.ac.uk/101342/ unknown BLACKWELL SCIENCE LTD TERRA NOVA , 8 (3) 245 - 254. (1996) NORTH-ATLANTIC OCEAN THERMOHALINE CIRCULATION CLIMATE MAXIMUM MODEL TRANSITIONS EXCHANGE DRIVEN Article 1996 ftucl 2016-01-15T02:34:48Z At present the Nordic Seas are a key region of North Atlantic Deep Water (NADW) formation. Two alternative scenarios have been suggested by some authors for the Last Glacial Maximum: (i) the Nordic Seas were permanently covered by sea ice, preventing the formation of NADW, or (ii) that they were seasonally free of ice and that deep water formation did occur. A modified scenario is presented here based on parallel ocean circulation modelling results from the GFDL primitive equation model and a planetary geostrophic model. It is suggested that the glacial Nordic Seas were at least seasonally ice free, but it is observed that there was never deep water formation from the surface; rather it occurred only in the North Atlantic south of 40 degrees-50 degrees N. North of 40 degrees N, the weaker LGM northward flowing thermohaline conveyor is subducted below a reverse conveyor which occurred to a depth of over 1000 m. Various modelling experiments presented here indicate that the reversed conveyor was primarily caused by the colder conditions of the glacial North Atlantic that led to far stronger zonality of glacial analogue of the North Atlantic Current. Article in Journal/Newspaper NADW Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Sea ice University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
NORTH-ATLANTIC OCEAN THERMOHALINE CIRCULATION CLIMATE MAXIMUM MODEL TRANSITIONS EXCHANGE DRIVEN |
spellingShingle |
NORTH-ATLANTIC OCEAN THERMOHALINE CIRCULATION CLIMATE MAXIMUM MODEL TRANSITIONS EXCHANGE DRIVEN Seidov, D Maslin, M Seasonally ice free glacial Nordic seas without deep water ventilation |
topic_facet |
NORTH-ATLANTIC OCEAN THERMOHALINE CIRCULATION CLIMATE MAXIMUM MODEL TRANSITIONS EXCHANGE DRIVEN |
description |
At present the Nordic Seas are a key region of North Atlantic Deep Water (NADW) formation. Two alternative scenarios have been suggested by some authors for the Last Glacial Maximum: (i) the Nordic Seas were permanently covered by sea ice, preventing the formation of NADW, or (ii) that they were seasonally free of ice and that deep water formation did occur. A modified scenario is presented here based on parallel ocean circulation modelling results from the GFDL primitive equation model and a planetary geostrophic model. It is suggested that the glacial Nordic Seas were at least seasonally ice free, but it is observed that there was never deep water formation from the surface; rather it occurred only in the North Atlantic south of 40 degrees-50 degrees N. North of 40 degrees N, the weaker LGM northward flowing thermohaline conveyor is subducted below a reverse conveyor which occurred to a depth of over 1000 m. Various modelling experiments presented here indicate that the reversed conveyor was primarily caused by the colder conditions of the glacial North Atlantic that led to far stronger zonality of glacial analogue of the North Atlantic Current. |
format |
Article in Journal/Newspaper |
author |
Seidov, D Maslin, M |
author_facet |
Seidov, D Maslin, M |
author_sort |
Seidov, D |
title |
Seasonally ice free glacial Nordic seas without deep water ventilation |
title_short |
Seasonally ice free glacial Nordic seas without deep water ventilation |
title_full |
Seasonally ice free glacial Nordic seas without deep water ventilation |
title_fullStr |
Seasonally ice free glacial Nordic seas without deep water ventilation |
title_full_unstemmed |
Seasonally ice free glacial Nordic seas without deep water ventilation |
title_sort |
seasonally ice free glacial nordic seas without deep water ventilation |
publisher |
BLACKWELL SCIENCE LTD |
publishDate |
1996 |
url |
http://discovery.ucl.ac.uk/101342/ |
genre |
NADW Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
NADW Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Sea ice |
op_source |
TERRA NOVA , 8 (3) 245 - 254. (1996) |
_version_ |
1766071039442288640 |