North Atlantic deep water circulation collapse during Heinrich events
Paleoceanographic proxy data and ocean general circulation models have been combined to investigate the response of the North Atlantic Ocean to Heinrich-type meltwater episodes. Because of the uncertainties over the origin of the Heinrich events, three different scenarios have been modeled: (1) a He...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
1999
|
Subjects: | |
Online Access: | http://discovery.ucl.ac.uk/1389444/ |
id |
ftucl:oai:eprints.ucl.ac.uk.OAI2:1389444 |
---|---|
record_format |
openpolar |
spelling |
ftucl:oai:eprints.ucl.ac.uk.OAI2:1389444 2023-05-15T16:00:01+02:00 North Atlantic deep water circulation collapse during Heinrich events Seidov, D Maslin, M 1999-01 http://discovery.ucl.ac.uk/1389444/ unknown Geology , 27 (1) pp. 23-26. (1999) Article 1999 ftucl 2017-03-30T22:18:23Z Paleoceanographic proxy data and ocean general circulation models have been combined to investigate the response of the North Atlantic Ocean to Heinrich-type meltwater episodes. Because of the uncertainties over the origin of the Heinrich events, three different scenarios have been modeled: (1) a Heinrich event caused by a dramatic increase in the iceberg discharge from the Laurentide ice sheet or Labrador ice shelf, (2) a Heinrich event driven by enhanced iceberg discharge from the Barents shelf, which was transported into the northern North Atlantic, and (3) a meltwater episode that was confined to the Nordic Seas. The ocean regional and global circulation models cannot distinguish between the Laurentide and Barents shelf Heinrich event scenarios because both led to a complete cessation of the deep-water thermohaline conveyor belt. The meltwater episode confined to the Nordic Seas only weakened the overturning and may represent circulation changes that may occur during the Dansgaard-Oeschger events. Article in Journal/Newspaper Dansgaard-Oeschger events Ice Sheet Ice Shelf Nordic Seas North Atlantic Deep Water North Atlantic University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
description |
Paleoceanographic proxy data and ocean general circulation models have been combined to investigate the response of the North Atlantic Ocean to Heinrich-type meltwater episodes. Because of the uncertainties over the origin of the Heinrich events, three different scenarios have been modeled: (1) a Heinrich event caused by a dramatic increase in the iceberg discharge from the Laurentide ice sheet or Labrador ice shelf, (2) a Heinrich event driven by enhanced iceberg discharge from the Barents shelf, which was transported into the northern North Atlantic, and (3) a meltwater episode that was confined to the Nordic Seas. The ocean regional and global circulation models cannot distinguish between the Laurentide and Barents shelf Heinrich event scenarios because both led to a complete cessation of the deep-water thermohaline conveyor belt. The meltwater episode confined to the Nordic Seas only weakened the overturning and may represent circulation changes that may occur during the Dansgaard-Oeschger events. |
format |
Article in Journal/Newspaper |
author |
Seidov, D Maslin, M |
spellingShingle |
Seidov, D Maslin, M North Atlantic deep water circulation collapse during Heinrich events |
author_facet |
Seidov, D Maslin, M |
author_sort |
Seidov, D |
title |
North Atlantic deep water circulation collapse during Heinrich events |
title_short |
North Atlantic deep water circulation collapse during Heinrich events |
title_full |
North Atlantic deep water circulation collapse during Heinrich events |
title_fullStr |
North Atlantic deep water circulation collapse during Heinrich events |
title_full_unstemmed |
North Atlantic deep water circulation collapse during Heinrich events |
title_sort |
north atlantic deep water circulation collapse during heinrich events |
publishDate |
1999 |
url |
http://discovery.ucl.ac.uk/1389444/ |
genre |
Dansgaard-Oeschger events Ice Sheet Ice Shelf Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Dansgaard-Oeschger events Ice Sheet Ice Shelf Nordic Seas North Atlantic Deep Water North Atlantic |
op_source |
Geology , 27 (1) pp. 23-26. (1999) |
_version_ |
1766395889978441728 |