Impact of the azores front propagation on deep ocean particle flux
Abstract The Azores Current originating as a branch of the Gulf Stream is a highly dynamic system in the subtropical North Atlantic. The associated front forms the northeastern boundary of the North Atlantic Subtropical Gyre. In this study we analyzed 42 years of assimilated modeled temperature fiel...
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Walter de Gruyter GmbH
2012
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Online Access: | http://dx.doi.org/10.2478/s13533-012-0102-2 http://link.springer.com/content/pdf/10.2478/s13533-012-0102-2.pdf http://link.springer.com/article/10.2478/s13533-012-0102-2/fulltext.html https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/xml https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/pdf |
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crdegruyter:10.2478/s13533-012-0102-2 2024-04-07T07:54:19+00:00 Impact of the azores front propagation on deep ocean particle flux Fründt, Birte Waniek, Joanna 2012 http://dx.doi.org/10.2478/s13533-012-0102-2 http://link.springer.com/content/pdf/10.2478/s13533-012-0102-2.pdf http://link.springer.com/article/10.2478/s13533-012-0102-2/fulltext.html https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/xml https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/pdf en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/3.0/ Open Geosciences volume 4, issue 4, page 531-544 ISSN 2391-5447 General Earth and Planetary Sciences Environmental Science (miscellaneous) journal-article 2012 crdegruyter https://doi.org/10.2478/s13533-012-0102-2 2024-03-08T00:40:32Z Abstract The Azores Current originating as a branch of the Gulf Stream is a highly dynamic system in the subtropical North Atlantic. The associated front forms the northeastern boundary of the North Atlantic Subtropical Gyre. In this study we analyzed 42 years of assimilated modeled temperature fields to localize the position of the Azores Front at 22°W and observed a fast north- and southward propagation between 30°N and 37°N on monthly to decadal time scales. The North Atlantic Oscillation with correlated changes of the wind direction was identified as one driving mechanism. As the front is acting as a guide for Rossby waves, the signal of the front’s propagation is transferred to the western Atlantic and, among other atmospheric forcing mechanisms, induces a shifting of the Northern Wall of the Gulf Stream with one year delay. Shallower mixed layer depths in the northern frontal region of the Azores Current caused by the rise of the isotherms lead to nutrient supply and primary production different from those found in the southern frontal region of the current system. A high interannual variability is manifested in deep ocean particle flux, derived from a sediment trap in 2000 m water depth at the mooring site KIEL276 (33°N, 22°W) from 1993 to 2008, which is directly related to the phytoplankton bloom in the euphotic zone. This variability is explained by the propagation of the front and strong variations in the catchment areas of the sediment trap due to the associated eddy activity in the frontal region. Article in Journal/Newspaper North Atlantic North Atlantic oscillation De Gruyter Open Geosciences 4 4 |
institution |
Open Polar |
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De Gruyter |
op_collection_id |
crdegruyter |
language |
English |
topic |
General Earth and Planetary Sciences Environmental Science (miscellaneous) |
spellingShingle |
General Earth and Planetary Sciences Environmental Science (miscellaneous) Fründt, Birte Waniek, Joanna Impact of the azores front propagation on deep ocean particle flux |
topic_facet |
General Earth and Planetary Sciences Environmental Science (miscellaneous) |
description |
Abstract The Azores Current originating as a branch of the Gulf Stream is a highly dynamic system in the subtropical North Atlantic. The associated front forms the northeastern boundary of the North Atlantic Subtropical Gyre. In this study we analyzed 42 years of assimilated modeled temperature fields to localize the position of the Azores Front at 22°W and observed a fast north- and southward propagation between 30°N and 37°N on monthly to decadal time scales. The North Atlantic Oscillation with correlated changes of the wind direction was identified as one driving mechanism. As the front is acting as a guide for Rossby waves, the signal of the front’s propagation is transferred to the western Atlantic and, among other atmospheric forcing mechanisms, induces a shifting of the Northern Wall of the Gulf Stream with one year delay. Shallower mixed layer depths in the northern frontal region of the Azores Current caused by the rise of the isotherms lead to nutrient supply and primary production different from those found in the southern frontal region of the current system. A high interannual variability is manifested in deep ocean particle flux, derived from a sediment trap in 2000 m water depth at the mooring site KIEL276 (33°N, 22°W) from 1993 to 2008, which is directly related to the phytoplankton bloom in the euphotic zone. This variability is explained by the propagation of the front and strong variations in the catchment areas of the sediment trap due to the associated eddy activity in the frontal region. |
format |
Article in Journal/Newspaper |
author |
Fründt, Birte Waniek, Joanna |
author_facet |
Fründt, Birte Waniek, Joanna |
author_sort |
Fründt, Birte |
title |
Impact of the azores front propagation on deep ocean particle flux |
title_short |
Impact of the azores front propagation on deep ocean particle flux |
title_full |
Impact of the azores front propagation on deep ocean particle flux |
title_fullStr |
Impact of the azores front propagation on deep ocean particle flux |
title_full_unstemmed |
Impact of the azores front propagation on deep ocean particle flux |
title_sort |
impact of the azores front propagation on deep ocean particle flux |
publisher |
Walter de Gruyter GmbH |
publishDate |
2012 |
url |
http://dx.doi.org/10.2478/s13533-012-0102-2 http://link.springer.com/content/pdf/10.2478/s13533-012-0102-2.pdf http://link.springer.com/article/10.2478/s13533-012-0102-2/fulltext.html https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/xml https://www.degruyter.com/document/doi/10.2478/s13533-012-0102-2/pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Open Geosciences volume 4, issue 4, page 531-544 ISSN 2391-5447 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/ |
op_doi |
https://doi.org/10.2478/s13533-012-0102-2 |
container_title |
Open Geosciences |
container_volume |
4 |
container_issue |
4 |
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1795670783106744320 |