In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014
Several open-ocean mesoscale features – a "young" warm-core (anti-cyclonic) eddy at 52° S, an "older" warm-core eddy at 57.5° S and an adjacent cold-core (cyclonic) eddy at 56° S – were surveyed during a R/V S.A. Agulhas II cruise in April 2014. The main aim of the survey was to...
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ftdoajarticles:oai:doaj.org/article:797e07372dc34d9580fb462af68f27f8 2023-05-15T18:25:07+02:00 In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 S. de Villiers K. Siswana K. Vena 2015-12-01T00:00:00Z https://doi.org/10.5194/essd-7-415-2015 https://doaj.org/article/797e07372dc34d9580fb462af68f27f8 EN eng Copernicus Publications http://www.earth-syst-sci-data.net/7/415/2015/essd-7-415-2015.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 1866-3508 1866-3516 doi:10.5194/essd-7-415-2015 https://doaj.org/article/797e07372dc34d9580fb462af68f27f8 Earth System Science Data, Vol 7, Iss 2, Pp 415-422 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/essd-7-415-2015 2022-12-31T01:23:32Z Several open-ocean mesoscale features – a "young" warm-core (anti-cyclonic) eddy at 52° S, an "older" warm-core eddy at 57.5° S and an adjacent cold-core (cyclonic) eddy at 56° S – were surveyed during a R/V S.A. Agulhas II cruise in April 2014. The main aim of the survey was to obtain hydrographical and biogeochemical profile data for contrasting open-ocean eddies in the Southern Ocean, which will be suitable for comparative study and modelling of their heat, salt and nutrient characteristics, and the changes that occur in these properties as warm-core eddies migrate from the polar front southwards. The major result is that the older warm-core eddy at 57.5° S is, at its core, 2.7 °C colder than a younger eddy at 52° S, while its dissolved silicate levels are almost 500 % higher and accompanied by chlorophyll a levels that are more than 200 % higher than that in the younger eddy. A total of 18 CTD stations were occupied in a sector south of the Southwest Indian Ridge, along three transects crossing several mesoscale features identified from satellite altimetry data prior to the cruise. The CTD data, as well as chlorophyll a and dissolved nutrient data (for NO 3 − , NO 2 − , PO 4 3− and SiO 2 ), have been processed, quality controlled and made available via the PANGAEA Data Archiving and Publication database at doi:10.1594/PANGAEA.848875 . Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Indian Earth System Science Data 7 2 415 422 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 S. de Villiers K. Siswana K. Vena In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Several open-ocean mesoscale features – a "young" warm-core (anti-cyclonic) eddy at 52° S, an "older" warm-core eddy at 57.5° S and an adjacent cold-core (cyclonic) eddy at 56° S – were surveyed during a R/V S.A. Agulhas II cruise in April 2014. The main aim of the survey was to obtain hydrographical and biogeochemical profile data for contrasting open-ocean eddies in the Southern Ocean, which will be suitable for comparative study and modelling of their heat, salt and nutrient characteristics, and the changes that occur in these properties as warm-core eddies migrate from the polar front southwards. The major result is that the older warm-core eddy at 57.5° S is, at its core, 2.7 °C colder than a younger eddy at 52° S, while its dissolved silicate levels are almost 500 % higher and accompanied by chlorophyll a levels that are more than 200 % higher than that in the younger eddy. A total of 18 CTD stations were occupied in a sector south of the Southwest Indian Ridge, along three transects crossing several mesoscale features identified from satellite altimetry data prior to the cruise. The CTD data, as well as chlorophyll a and dissolved nutrient data (for NO 3 − , NO 2 − , PO 4 3− and SiO 2 ), have been processed, quality controlled and made available via the PANGAEA Data Archiving and Publication database at doi:10.1594/PANGAEA.848875 . |
format |
Article in Journal/Newspaper |
author |
S. de Villiers K. Siswana K. Vena |
author_facet |
S. de Villiers K. Siswana K. Vena |
author_sort |
S. de Villiers |
title |
In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
title_short |
In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
title_full |
In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
title_fullStr |
In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
title_full_unstemmed |
In situ measurement of the biogeochemical properties of Southern Ocean mesoscale eddies in the Southwest Indian Ocean, April 2014 |
title_sort |
in situ measurement of the biogeochemical properties of southern ocean mesoscale eddies in the southwest indian ocean, april 2014 |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/essd-7-415-2015 https://doaj.org/article/797e07372dc34d9580fb462af68f27f8 |
geographic |
Southern Ocean Indian |
geographic_facet |
Southern Ocean Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Earth System Science Data, Vol 7, Iss 2, Pp 415-422 (2015) |
op_relation |
http://www.earth-syst-sci-data.net/7/415/2015/essd-7-415-2015.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 1866-3508 1866-3516 doi:10.5194/essd-7-415-2015 https://doaj.org/article/797e07372dc34d9580fb462af68f27f8 |
op_doi |
https://doi.org/10.5194/essd-7-415-2015 |
container_title |
Earth System Science Data |
container_volume |
7 |
container_issue |
2 |
container_start_page |
415 |
op_container_end_page |
422 |
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1766206338605514752 |