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 reconstructi...
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Online Access: | https://doi.org/10.1029/2007GL030285 https://archimer.ifremer.fr/doc/00235/34646/33007.pdf https://archimer.ifremer.fr/doc/00235/34646/ |
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fttriple:oai:gotriple.eu:10670/1.2xqf9w 2023-05-15T16:49:33+02:00 North Atlantic climate and deep-ocean flow speed changes during the last 230 years Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, I. 2007-01-01 https://doi.org/10.1029/2007GL030285 https://archimer.ifremer.fr/doc/00235/34646/33007.pdf https://archimer.ifremer.fr/doc/00235/34646/ en eng Amer Geophysical Union doi:10.1029/2007GL030285 10670/1.2xqf9w https://archimer.ifremer.fr/doc/00235/34646/33007.pdf https://archimer.ifremer.fr/doc/00235/34646/ other Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2007-07 , Vol. 34 , N. 13/L13614 , P. 1-6 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2007 fttriple https://doi.org/10.1029/2007GL030285 2023-01-22T18:40:03Z 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. Text Iceland Labrador Sea North Atlantic North Atlantic oscillation Unknown Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geophysical Research Letters 34 13 n/a n/a |
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English |
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geo envir Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, I. North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
topic_facet |
geo envir |
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 |
Text |
author |
Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, I. |
author_facet |
Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, I. |
author_sort |
Boessenkool, K. P. |
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 |
Amer Geophysical Union |
publishDate |
2007 |
url |
https://doi.org/10.1029/2007GL030285 https://archimer.ifremer.fr/doc/00235/34646/33007.pdf https://archimer.ifremer.fr/doc/00235/34646/ |
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_source |
Archimer, archive institutionnelle de l'Ifremer Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2007-07 , Vol. 34 , N. 13/L13614 , P. 1-6 |
op_relation |
doi:10.1029/2007GL030285 10670/1.2xqf9w https://archimer.ifremer.fr/doc/00235/34646/33007.pdf https://archimer.ifremer.fr/doc/00235/34646/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2007GL030285 |
container_title |
Geophysical Research Letters |
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34 |
container_issue |
13 |
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n/a |
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n/a |
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1766039690211753984 |