On the spatial structure and temporal variability of poleward transport between Scotland and Grennland :
[1] The flow north of warm subtropical water though the northeastern Atlantic is known to have many pathways that vary over time. Here we use a combination of upper ocean current measurements between Greenland and Scotland near 60°N and satellite altimetry to examine the space-time variability of po...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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Stockholms universitet, Meteorologiska institutionen (MISU)
2014
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101309 https://doi.org/10.1002/2013JC009287 |
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ftstockholmuniv:oai:DiVA.org:su-101309 2023-05-15T16:28:32+02:00 On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : Chafik, Léon Rossby, Thomas Schrum, Corinna 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101309 https://doi.org/10.1002/2013JC009287 eng eng Stockholms universitet, Meteorologiska institutionen (MISU) Journal of Geophysical Research: Oceans, 2169-9291, 2014, 119:2, s. 824-841 orcid:0000-0002-5538-545X http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101309 doi:10.1002/2013JC009287 ISI:000336261200012 info:eu-repo/semantics/openAccess Poleward transport ADCP Satellite altimetry Topographic control inter-annual variability MOC Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2014 ftstockholmuniv https://doi.org/10.1002/2013JC009287 2023-02-23T21:41:27Z [1] The flow north of warm subtropical water though the northeastern Atlantic is known to have many pathways that vary over time. Here we use a combination of upper ocean current measurements between Greenland and Scotland near 60°N and satellite altimetry to examine the space-time variability of poleward transport. The high-resolution scans of currents in the top 400 m show that the Reykjanes Ridge serves as a very effective separator of flow toward the Nordic and Labrador Seas, respectively. Whereas the Labrador Sea branch exhibits two mean flows to the north on the western slope of the Reykjanes Ridge, the eastern branch flows north in roughly equal amounts over the deep Maury channel and east of Hatton Bank including the Slope Current. There is also a well-defined southward flow along the eastern slope of the Reykjanes Ridge. The satellite altimetric sea surface height (SSH) data show good overall agreement with geostrophically determined -level difference from the repeat ADCP sections (1999–2002), but are unable to resolve the fine structure of the topographically defined mean circulation. The altimetric data show that variations in poleward flow west and east of the Reykjanes Ridge are strongly anticorrelated. They further reveal that the two eastern subbranches also exhibit anticorrelated variability, but offset in time with respect to the Labrador Sea branch. Remarkably, all these variations cancel out for the entire Greenland-Scotland section leaving a gradual decrease in sea-level difference of about 0.06 m over the 1993 to the end of 2010 observation period. Article in Journal/Newspaper Greenland Labrador Sea Stockholm University: Publications (DiVA) Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Hatton Bank ENVELOPE(-18.000,-18.000,58.583,58.583) Journal of Geophysical Research: Oceans 119 2 824 841 |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Poleward transport ADCP Satellite altimetry Topographic control inter-annual variability MOC Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
Poleward transport ADCP Satellite altimetry Topographic control inter-annual variability MOC Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Chafik, Léon Rossby, Thomas Schrum, Corinna On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
topic_facet |
Poleward transport ADCP Satellite altimetry Topographic control inter-annual variability MOC Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
[1] The flow north of warm subtropical water though the northeastern Atlantic is known to have many pathways that vary over time. Here we use a combination of upper ocean current measurements between Greenland and Scotland near 60°N and satellite altimetry to examine the space-time variability of poleward transport. The high-resolution scans of currents in the top 400 m show that the Reykjanes Ridge serves as a very effective separator of flow toward the Nordic and Labrador Seas, respectively. Whereas the Labrador Sea branch exhibits two mean flows to the north on the western slope of the Reykjanes Ridge, the eastern branch flows north in roughly equal amounts over the deep Maury channel and east of Hatton Bank including the Slope Current. There is also a well-defined southward flow along the eastern slope of the Reykjanes Ridge. The satellite altimetric sea surface height (SSH) data show good overall agreement with geostrophically determined -level difference from the repeat ADCP sections (1999–2002), but are unable to resolve the fine structure of the topographically defined mean circulation. The altimetric data show that variations in poleward flow west and east of the Reykjanes Ridge are strongly anticorrelated. They further reveal that the two eastern subbranches also exhibit anticorrelated variability, but offset in time with respect to the Labrador Sea branch. Remarkably, all these variations cancel out for the entire Greenland-Scotland section leaving a gradual decrease in sea-level difference of about 0.06 m over the 1993 to the end of 2010 observation period. |
format |
Article in Journal/Newspaper |
author |
Chafik, Léon Rossby, Thomas Schrum, Corinna |
author_facet |
Chafik, Léon Rossby, Thomas Schrum, Corinna |
author_sort |
Chafik, Léon |
title |
On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
title_short |
On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
title_full |
On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
title_fullStr |
On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
title_full_unstemmed |
On the spatial structure and temporal variability of poleward transport between Scotland and Grennland : |
title_sort |
on the spatial structure and temporal variability of poleward transport between scotland and grennland : |
publisher |
Stockholms universitet, Meteorologiska institutionen (MISU) |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101309 https://doi.org/10.1002/2013JC009287 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-18.000,-18.000,58.583,58.583) |
geographic |
Greenland Reykjanes Hatton Bank |
geographic_facet |
Greenland Reykjanes Hatton Bank |
genre |
Greenland Labrador Sea |
genre_facet |
Greenland Labrador Sea |
op_relation |
Journal of Geophysical Research: Oceans, 2169-9291, 2014, 119:2, s. 824-841 orcid:0000-0002-5538-545X http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101309 doi:10.1002/2013JC009287 ISI:000336261200012 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2013JC009287 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
2 |
container_start_page |
824 |
op_container_end_page |
841 |
_version_ |
1766018192645292032 |