North Atlantic climate and deep-ocean flow speed changes during the last 230 years
Variations in the near-bottom flow speed of Iceland-Scotland Overflow Water (ISOW) are documented in a 230-year-long deep-sea sediment record from the eastern flank of Reykjanes Ridge in the subpolar North Atlantic at (sub)decadal time scales. For recent decades, the ISOW palaeocurrent reconstructio...
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American Geophysical Union
2007
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/30498/ https://doi.org/10.1029/2007GL030285 https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:30498 2023-06-11T04:13:09+02:00 North Atlantic climate and deep-ocean flow speed changes during the last 230 years Boessenkool, Karin Petra Hall, Ian Robert Elderfield, H. Yashayaev, I. 2007 application/pdf https://orca.cardiff.ac.uk/id/eprint/30498/ https://doi.org/10.1029/2007GL030285 https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf en eng American Geophysical Union https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf Boessenkool, Karin Petra, Hall, Ian Robert https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419, Elderfield, H. and Yashayaev, I. 2007. North Atlantic climate and deep-ocean flow speed changes during the last 230 years. Geophysical Research Letters 34 (13) , L13614. 10.1029/2007GL030285 https://doi.org/10.1029/2007GL030285 file https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf doi:10.1029/2007GL030285 G Geography (General) GC Oceanography Article PeerReviewed 2007 ftunivcardiff https://doi.org/10.1029/2007GL030285 2023-05-04T22:33:25Z Variations in the near-bottom flow speed of Iceland-Scotland Overflow Water (ISOW) are documented in a 230-year-long deep-sea sediment record from the eastern flank of Reykjanes Ridge in the subpolar North Atlantic at (sub)decadal time scales. For recent decades, the ISOW palaeocurrent reconstructions show similarities with observational hydrographic data. Furthermore, recent ISOW flow changes fall mostly within the range of its variability of the past 230 years. The record also reveals a hitherto unrecognized coupling of deep flow speeds in the subpolar North Atlantic with the North Atlantic Oscillation (NAO) index, with more (less) vigorous ISOW flow during negative (positive) phases of the NAO. Our results suggest that the changes in ISOW vigor are largely controlled by the transport and characteristics of Labrador Sea Water rather than variations in the overflow itself, with implications for the meridional overturning of the Atlantic Ocean and climate. Article in Journal/Newspaper Iceland Labrador Sea North Atlantic North Atlantic oscillation Cardiff University: ORCA (Online Research @ Cardiff) Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geophysical Research Letters 34 13 n/a n/a |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
topic |
G Geography (General) GC Oceanography |
spellingShingle |
G Geography (General) GC Oceanography Boessenkool, Karin Petra Hall, Ian Robert Elderfield, H. Yashayaev, I. North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
topic_facet |
G Geography (General) GC Oceanography |
description |
Variations in the near-bottom flow speed of Iceland-Scotland Overflow Water (ISOW) are documented in a 230-year-long deep-sea sediment record from the eastern flank of Reykjanes Ridge in the subpolar North Atlantic at (sub)decadal time scales. For recent decades, the ISOW palaeocurrent reconstructions show similarities with observational hydrographic data. Furthermore, recent ISOW flow changes fall mostly within the range of its variability of the past 230 years. The record also reveals a hitherto unrecognized coupling of deep flow speeds in the subpolar North Atlantic with the North Atlantic Oscillation (NAO) index, with more (less) vigorous ISOW flow during negative (positive) phases of the NAO. Our results suggest that the changes in ISOW vigor are largely controlled by the transport and characteristics of Labrador Sea Water rather than variations in the overflow itself, with implications for the meridional overturning of the Atlantic Ocean and climate. |
format |
Article in Journal/Newspaper |
author |
Boessenkool, Karin Petra Hall, Ian Robert Elderfield, H. Yashayaev, I. |
author_facet |
Boessenkool, Karin Petra Hall, Ian Robert Elderfield, H. Yashayaev, I. |
author_sort |
Boessenkool, Karin Petra |
title |
North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
title_short |
North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
title_full |
North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
title_fullStr |
North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
title_full_unstemmed |
North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
title_sort |
north atlantic climate and deep-ocean flow speed changes during the last 230 years |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
https://orca.cardiff.ac.uk/id/eprint/30498/ https://doi.org/10.1029/2007GL030285 https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Reykjanes |
geographic_facet |
Reykjanes |
genre |
Iceland Labrador Sea North Atlantic North Atlantic oscillation |
genre_facet |
Iceland Labrador Sea North Atlantic North Atlantic oscillation |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf Boessenkool, Karin Petra, Hall, Ian Robert https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419, Elderfield, H. and Yashayaev, I. 2007. North Atlantic climate and deep-ocean flow speed changes during the last 230 years. Geophysical Research Letters 34 (13) , L13614. 10.1029/2007GL030285 https://doi.org/10.1029/2007GL030285 file https://orca.cardiff.ac.uk/id/eprint/30498/1/Boessenkool%202007.pdf doi:10.1029/2007GL030285 |
op_doi |
https://doi.org/10.1029/2007GL030285 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
13 |
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n/a |
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n/a |
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1768389825476427776 |