The biogeochemical structure of Southern Ocean mesoscale eddies
Mesoscale eddies play a key role in modulating physical and biogeochemical properties across the global ocean. They also play a central role in cross‐frontal transport of heat, freshwater, and carbon, especially in the Southern Ocean. However, the role that eddies play in the biogeochemical cycles i...
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ftunivtasmania:oai:eprints.utas.edu.au:34549 2023-05-15T18:24:30+02:00 The biogeochemical structure of Southern Ocean mesoscale eddies Patel, RS Llort, J Strutton, PG Phillips, HE Moreau, S Conde Pardo, P Lenton, A 2020 application/pdf https://eprints.utas.edu.au/34549/ https://eprints.utas.edu.au/34549/1/140595%20-%20The%20biogeochemical%20structure%20of%20Southern%20Ocean%20mesoscale%20eddies.pdf en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/34549/1/140595%20-%20The%20biogeochemical%20structure%20of%20Southern%20Ocean%20mesoscale%20eddies.pdf Patel, RS orcid:0000-0002-5302-6509 , Llort, J orcid:0000-0003-1490-4521 , Strutton, PG orcid:0000-0002-2395-9471 , Phillips, HE orcid:0000-0002-2941-7577 , Moreau, S orcid:0000-0001-9446-812X , Conde Pardo, P orcid:0000-0001-6348-2332 and Lenton, A 2020 , 'The biogeochemical structure of Southern Ocean mesoscale eddies' , Journal of Geophysical Research: Oceans, vol. 125, no. 8 , pp. 1-24 , doi:10.1029/2020JC016115 <http://dx.doi.org/10.1029/2020JC016115>. Southern Ocean eddies nutrient transport biomass stoichiometry observations Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1029/2020JC016115 2022-01-10T23:16:42Z Mesoscale eddies play a key role in modulating physical and biogeochemical properties across the global ocean. They also play a central role in cross‐frontal transport of heat, freshwater, and carbon, especially in the Southern Ocean. However, the role that eddies play in the biogeochemical cycles is not yet well constrained, partly due to a lack of observations below the surface. Here, we use hydrographic data from two voyages, conducted in the austral summer and autumn, to document the vertical biogeochemical structure of two mesoscale cyclonic eddies and quantify the role of these eddies in the meridional transport of nutrients across the Subantarctic Front. Our study demonstrates that the nutrient distribution is largely driven by eddy dynamics, yielding identical eddy structure below the mixed layer in both seasons. This result allowed us to relate nutrient content to dynamic height and estimate the average transport by eddies across the Subantarctic Front. We found that relative to Subantarctic Zone waters, long‐lived cold‐core eddies carry nitrate anomalies of 1.6±0.2×1010 moles and silicate anomalies of −5.5±0.7×1010 moles across the fronts each year. This cross‐frontal transport of nutrients has negligible impact on Subantarctic Zone productivity; however, it has potential to modify the nutrient content of mode waters that are exported from the Southern Ocean to lower latitudes. Article in Journal/Newspaper Southern Ocean University of Tasmania: UTas ePrints Southern Ocean Austral Journal of Geophysical Research: Oceans 125 8 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Southern Ocean eddies nutrient transport biomass stoichiometry observations |
spellingShingle |
Southern Ocean eddies nutrient transport biomass stoichiometry observations Patel, RS Llort, J Strutton, PG Phillips, HE Moreau, S Conde Pardo, P Lenton, A The biogeochemical structure of Southern Ocean mesoscale eddies |
topic_facet |
Southern Ocean eddies nutrient transport biomass stoichiometry observations |
description |
Mesoscale eddies play a key role in modulating physical and biogeochemical properties across the global ocean. They also play a central role in cross‐frontal transport of heat, freshwater, and carbon, especially in the Southern Ocean. However, the role that eddies play in the biogeochemical cycles is not yet well constrained, partly due to a lack of observations below the surface. Here, we use hydrographic data from two voyages, conducted in the austral summer and autumn, to document the vertical biogeochemical structure of two mesoscale cyclonic eddies and quantify the role of these eddies in the meridional transport of nutrients across the Subantarctic Front. Our study demonstrates that the nutrient distribution is largely driven by eddy dynamics, yielding identical eddy structure below the mixed layer in both seasons. This result allowed us to relate nutrient content to dynamic height and estimate the average transport by eddies across the Subantarctic Front. We found that relative to Subantarctic Zone waters, long‐lived cold‐core eddies carry nitrate anomalies of 1.6±0.2×1010 moles and silicate anomalies of −5.5±0.7×1010 moles across the fronts each year. This cross‐frontal transport of nutrients has negligible impact on Subantarctic Zone productivity; however, it has potential to modify the nutrient content of mode waters that are exported from the Southern Ocean to lower latitudes. |
format |
Article in Journal/Newspaper |
author |
Patel, RS Llort, J Strutton, PG Phillips, HE Moreau, S Conde Pardo, P Lenton, A |
author_facet |
Patel, RS Llort, J Strutton, PG Phillips, HE Moreau, S Conde Pardo, P Lenton, A |
author_sort |
Patel, RS |
title |
The biogeochemical structure of Southern Ocean mesoscale eddies |
title_short |
The biogeochemical structure of Southern Ocean mesoscale eddies |
title_full |
The biogeochemical structure of Southern Ocean mesoscale eddies |
title_fullStr |
The biogeochemical structure of Southern Ocean mesoscale eddies |
title_full_unstemmed |
The biogeochemical structure of Southern Ocean mesoscale eddies |
title_sort |
biogeochemical structure of southern ocean mesoscale eddies |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2020 |
url |
https://eprints.utas.edu.au/34549/ https://eprints.utas.edu.au/34549/1/140595%20-%20The%20biogeochemical%20structure%20of%20Southern%20Ocean%20mesoscale%20eddies.pdf |
geographic |
Southern Ocean Austral |
geographic_facet |
Southern Ocean Austral |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://eprints.utas.edu.au/34549/1/140595%20-%20The%20biogeochemical%20structure%20of%20Southern%20Ocean%20mesoscale%20eddies.pdf Patel, RS orcid:0000-0002-5302-6509 , Llort, J orcid:0000-0003-1490-4521 , Strutton, PG orcid:0000-0002-2395-9471 , Phillips, HE orcid:0000-0002-2941-7577 , Moreau, S orcid:0000-0001-9446-812X , Conde Pardo, P orcid:0000-0001-6348-2332 and Lenton, A 2020 , 'The biogeochemical structure of Southern Ocean mesoscale eddies' , Journal of Geophysical Research: Oceans, vol. 125, no. 8 , pp. 1-24 , doi:10.1029/2020JC016115 <http://dx.doi.org/10.1029/2020JC016115>. |
op_doi |
https://doi.org/10.1029/2020JC016115 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
8 |
_version_ |
1766205105879646208 |