Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region
The summertime phytoplankton bloom near the Kerguelen Plateau is in marked contrast to the low-chlorophyll conditions typical of the Southern Ocean and is thought to arise from natural iron fertilisation. The mechanisms of iron supply to the euphotic zone in this region are poorly understood, and nu...
Published in: | Ocean Modelling |
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Online Access: | http://hdl.handle.net/1885/73821 https://doi.org/10.1016/j.ocemod.2014.05.001 https://openresearch-repository.anu.edu.au/bitstream/1885/73821/5/U3488905xPUB3845_2014.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/73821/7/01_Rosso_Vertical_transport_in_the_2014.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/73821 2024-01-14T10:10:51+01:00 Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region Rosso, Isabella Hogg, Andrew Strutton, Peter G Kiss, A E Matear, R.J. Klocker, Andreas van Sebille, Erik http://hdl.handle.net/1885/73821 https://doi.org/10.1016/j.ocemod.2014.05.001 https://openresearch-repository.anu.edu.au/bitstream/1885/73821/5/U3488905xPUB3845_2014.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/73821/7/01_Rosso_Vertical_transport_in_the_2014.pdf.jpg unknown Elsevier 1463-5003 http://hdl.handle.net/1885/73821 doi:10.1016/j.ocemod.2014.05.001 https://openresearch-repository.anu.edu.au/bitstream/1885/73821/5/U3488905xPUB3845_2014.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/73821/7/01_Rosso_Vertical_transport_in_the_2014.pdf.jpg Ocean Modelling Keywords: Iron Horizontal resolution Lagrangian particles Lagrangian tracking Meso scale Natural iron fertilisation Southern ocean Vertical transports Vertical velocity Oceanography chlorophyll flow structure flow velocity iron mesoscale motion phyto Lagrangian particle Mesoscales Journal article ftanucanberra https://doi.org/10.1016/j.ocemod.2014.05.001 2023-12-15T09:33:15Z The summertime phytoplankton bloom near the Kerguelen Plateau is in marked contrast to the low-chlorophyll conditions typical of the Southern Ocean and is thought to arise from natural iron fertilisation. The mechanisms of iron supply to the euphotic zone in this region are poorly understood, and numerical studies of iron transport have until now omitted fine-scale (sub-mesoscale) dynamics which have been shown to significantly increase vertical transport in other parts of the ocean. We present the first sub-mesoscale-resolving study of the flow and vertical transport in this region. The modelled transport and flow structure agree well with observations. We find that an increase in horizontal resolution from mesoscale-resolving (1/20°) to 1/80° resolves sub-mesoscale filamentary frontal structures in which vertical velocities are dramatically higher and are consistent with available observations. Lagrangian tracking shows that water is advected to the surface from much greater depth in the sub-mesoscale-resolving experiment, and that vertical exchange is far more rapid and frequent. This study of sub-mesoscale vertical velocities sets the foundation for subsequent investigation of iron transport in this environment. Article in Journal/Newspaper Southern Ocean Australian National University: ANU Digital Collections Southern Ocean Kerguelen Ocean Modelling 80 10 23 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Iron Horizontal resolution Lagrangian particles Lagrangian tracking Meso scale Natural iron fertilisation Southern ocean Vertical transports Vertical velocity Oceanography chlorophyll flow structure flow velocity iron mesoscale motion phyto Lagrangian particle Mesoscales |
spellingShingle |
Keywords: Iron Horizontal resolution Lagrangian particles Lagrangian tracking Meso scale Natural iron fertilisation Southern ocean Vertical transports Vertical velocity Oceanography chlorophyll flow structure flow velocity iron mesoscale motion phyto Lagrangian particle Mesoscales Rosso, Isabella Hogg, Andrew Strutton, Peter G Kiss, A E Matear, R.J. Klocker, Andreas van Sebille, Erik Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
topic_facet |
Keywords: Iron Horizontal resolution Lagrangian particles Lagrangian tracking Meso scale Natural iron fertilisation Southern ocean Vertical transports Vertical velocity Oceanography chlorophyll flow structure flow velocity iron mesoscale motion phyto Lagrangian particle Mesoscales |
description |
The summertime phytoplankton bloom near the Kerguelen Plateau is in marked contrast to the low-chlorophyll conditions typical of the Southern Ocean and is thought to arise from natural iron fertilisation. The mechanisms of iron supply to the euphotic zone in this region are poorly understood, and numerical studies of iron transport have until now omitted fine-scale (sub-mesoscale) dynamics which have been shown to significantly increase vertical transport in other parts of the ocean. We present the first sub-mesoscale-resolving study of the flow and vertical transport in this region. The modelled transport and flow structure agree well with observations. We find that an increase in horizontal resolution from mesoscale-resolving (1/20°) to 1/80° resolves sub-mesoscale filamentary frontal structures in which vertical velocities are dramatically higher and are consistent with available observations. Lagrangian tracking shows that water is advected to the surface from much greater depth in the sub-mesoscale-resolving experiment, and that vertical exchange is far more rapid and frequent. This study of sub-mesoscale vertical velocities sets the foundation for subsequent investigation of iron transport in this environment. |
format |
Article in Journal/Newspaper |
author |
Rosso, Isabella Hogg, Andrew Strutton, Peter G Kiss, A E Matear, R.J. Klocker, Andreas van Sebille, Erik |
author_facet |
Rosso, Isabella Hogg, Andrew Strutton, Peter G Kiss, A E Matear, R.J. Klocker, Andreas van Sebille, Erik |
author_sort |
Rosso, Isabella |
title |
Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
title_short |
Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
title_full |
Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
title_fullStr |
Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
title_full_unstemmed |
Vertical transport in the ocean due to sub-mesoscale structures: Impacts in the Kerguelen region |
title_sort |
vertical transport in the ocean due to sub-mesoscale structures: impacts in the kerguelen region |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/73821 https://doi.org/10.1016/j.ocemod.2014.05.001 https://openresearch-repository.anu.edu.au/bitstream/1885/73821/5/U3488905xPUB3845_2014.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/73821/7/01_Rosso_Vertical_transport_in_the_2014.pdf.jpg |
geographic |
Southern Ocean Kerguelen |
geographic_facet |
Southern Ocean Kerguelen |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Ocean Modelling |
op_relation |
1463-5003 http://hdl.handle.net/1885/73821 doi:10.1016/j.ocemod.2014.05.001 https://openresearch-repository.anu.edu.au/bitstream/1885/73821/5/U3488905xPUB3845_2014.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/73821/7/01_Rosso_Vertical_transport_in_the_2014.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.ocemod.2014.05.001 |
container_title |
Ocean Modelling |
container_volume |
80 |
container_start_page |
10 |
op_container_end_page |
23 |
_version_ |
1788065696194756608 |