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...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2007
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Online Access: | https://research.library.mun.ca/2054/ https://research.library.mun.ca/2054/1/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://research.library.mun.ca/2054/3/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://doi.org/10.1029/2007GL030285 |
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ftmemorialuniv:oai:research.library.mun.ca:2054 2023-10-01T03:56:55+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, Igor 2007-07 application/pdf https://research.library.mun.ca/2054/ https://research.library.mun.ca/2054/1/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://research.library.mun.ca/2054/3/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://doi.org/10.1029/2007GL030285 en eng American Geophysical Union https://research.library.mun.ca/2054/1/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://research.library.mun.ca/2054/3/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf Boessenkool, K. P. <https://research.library.mun.ca/view/creator_az/Boessenkool=3AK=2E_P=2E=3A=3A.html> and Hall, I. R. <https://research.library.mun.ca/view/creator_az/Hall=3AI=2E_R=2E=3A=3A.html> and Elderfield, H. <https://research.library.mun.ca/view/creator_az/Elderfield=3AH=2E=3A=3A.html> and Yashayaev, Igor <https://research.library.mun.ca/view/creator_az/Yashayaev=3AIgor=3A=3A.html> (2007) North Atlantic climate and deep-ocean flow speed changes during the last 230 years. Geophysical Research Letters, 34 (13). ISSN 1944-8007 cc_by_nc Article PeerReviewed 2007 ftmemorialuniv https://doi.org/10.1029/2007GL030285 2023-09-03T06:44:41Z 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 Memorial University of Newfoundland: Research Repository Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Geophysical Research Letters 34 13 n/a n/a |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
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, K. P. Hall, I. R. Elderfield, H. Yashayaev, Igor |
spellingShingle |
Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, Igor North Atlantic climate and deep-ocean flow speed changes during the last 230 years |
author_facet |
Boessenkool, K. P. Hall, I. R. Elderfield, H. Yashayaev, Igor |
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 |
American Geophysical Union |
publishDate |
2007 |
url |
https://research.library.mun.ca/2054/ https://research.library.mun.ca/2054/1/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://research.library.mun.ca/2054/3/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://doi.org/10.1029/2007GL030285 |
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://research.library.mun.ca/2054/1/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf https://research.library.mun.ca/2054/3/North_Atlantic_climate_and_deep-ocean_flow_speed_changes_during_the_last_230_years.pdf Boessenkool, K. P. <https://research.library.mun.ca/view/creator_az/Boessenkool=3AK=2E_P=2E=3A=3A.html> and Hall, I. R. <https://research.library.mun.ca/view/creator_az/Hall=3AI=2E_R=2E=3A=3A.html> and Elderfield, H. <https://research.library.mun.ca/view/creator_az/Elderfield=3AH=2E=3A=3A.html> and Yashayaev, Igor <https://research.library.mun.ca/view/creator_az/Yashayaev=3AIgor=3A=3A.html> (2007) North Atlantic climate and deep-ocean flow speed changes during the last 230 years. Geophysical Research Letters, 34 (13). ISSN 1944-8007 |
op_rights |
cc_by_nc |
op_doi |
https://doi.org/10.1029/2007GL030285 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
13 |
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1778527602210766848 |