Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean
Article published in Geophysical Research Letters, vol. 43(17): 9192-9199 In the Sub-Antarctic Ocean elevated phytoplankton biomass persists through summer at a time when productivity is expected to be low due to iron limitation. Biological iron recycling has been shown to support summer biomass. In...
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Online Access: | http://hdl.handle.net/10204/10065 https://doi.org/10.1002/2016GL069973 http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full |
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ftcsir:oai:researchspace.csir.co.za:10204/10065 2024-06-09T07:40:08+00:00 Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean Nicholson, Sarah-Anne Lévy, M Llort, J Swart, S Monteiro, Pedro MS 2016-09 application/pdf http://hdl.handle.net/10204/10065 https://doi.org/10.1002/2016GL069973 http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full en eng American Geophysical Union Worklist;20230 Worklist;20216 Nicholson, S-A. et al. 2016. Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean. Geophysical Research Letters, vol. 43(17): 9192-9199 0094-8276 doi:10.1002/2016GL069973 http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full http://hdl.handle.net/10204/10065 Control runs SXLD Deepening Runs Sub-Antarctic Ocean Surface-mixing layer Subsurface Mixing Runs Article 2016 ftcsir https://doi.org/10.1002/2016GL069973 2024-05-15T07:56:50Z Article published in Geophysical Research Letters, vol. 43(17): 9192-9199 In the Sub-Antarctic Ocean elevated phytoplankton biomass persists through summer at a time when productivity is expected to be low due to iron limitation. Biological iron recycling has been shown to support summer biomass. In addition, we investigate an iron supply mechanism previously unaccounted for in iron budget studies. Using a 1-D biogeochemical model, we show how storm-driven mixing provides relief from phytoplankton iron limitation through the entrainment of iron beneath the productive layer. This effect is significant when a mixing transition layer of strong diffusivities (kz > 10−4 m2 s−1) is present beneath the surface-mixing layer. Such subsurface mixing has been shown to arise from interactions between turbulent ocean dynamics and storm-driven inertial motions. The addition of intraseasonal mixing yielded increases of up to 60% in summer primary production. These results stress the need to acquire observations of subsurface mixing and to develop the appropriate parameterizations of such phenomena for ocean-biogeochemical models. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Council for Scientific and Industrial Research (South Africa): CSIR Research Space Antarctic Antarctic Ocean Geophysical Research Letters 43 17 9192 9199 |
institution |
Open Polar |
collection |
Council for Scientific and Industrial Research (South Africa): CSIR Research Space |
op_collection_id |
ftcsir |
language |
English |
topic |
Control runs SXLD Deepening Runs Sub-Antarctic Ocean Surface-mixing layer Subsurface Mixing Runs |
spellingShingle |
Control runs SXLD Deepening Runs Sub-Antarctic Ocean Surface-mixing layer Subsurface Mixing Runs Nicholson, Sarah-Anne Lévy, M Llort, J Swart, S Monteiro, Pedro MS Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
topic_facet |
Control runs SXLD Deepening Runs Sub-Antarctic Ocean Surface-mixing layer Subsurface Mixing Runs |
description |
Article published in Geophysical Research Letters, vol. 43(17): 9192-9199 In the Sub-Antarctic Ocean elevated phytoplankton biomass persists through summer at a time when productivity is expected to be low due to iron limitation. Biological iron recycling has been shown to support summer biomass. In addition, we investigate an iron supply mechanism previously unaccounted for in iron budget studies. Using a 1-D biogeochemical model, we show how storm-driven mixing provides relief from phytoplankton iron limitation through the entrainment of iron beneath the productive layer. This effect is significant when a mixing transition layer of strong diffusivities (kz > 10−4 m2 s−1) is present beneath the surface-mixing layer. Such subsurface mixing has been shown to arise from interactions between turbulent ocean dynamics and storm-driven inertial motions. The addition of intraseasonal mixing yielded increases of up to 60% in summer primary production. These results stress the need to acquire observations of subsurface mixing and to develop the appropriate parameterizations of such phenomena for ocean-biogeochemical models. |
format |
Article in Journal/Newspaper |
author |
Nicholson, Sarah-Anne Lévy, M Llort, J Swart, S Monteiro, Pedro MS |
author_facet |
Nicholson, Sarah-Anne Lévy, M Llort, J Swart, S Monteiro, Pedro MS |
author_sort |
Nicholson, Sarah-Anne |
title |
Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
title_short |
Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
title_full |
Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
title_fullStr |
Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
title_full_unstemmed |
Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean |
title_sort |
investigation into the impact of storms on sustaining summer primary productivity in the sub-antarctic ocean |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://hdl.handle.net/10204/10065 https://doi.org/10.1002/2016GL069973 http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full |
geographic |
Antarctic Antarctic Ocean |
geographic_facet |
Antarctic Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_relation |
Worklist;20230 Worklist;20216 Nicholson, S-A. et al. 2016. Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean. Geophysical Research Letters, vol. 43(17): 9192-9199 0094-8276 doi:10.1002/2016GL069973 http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full http://hdl.handle.net/10204/10065 |
op_doi |
https://doi.org/10.1002/2016GL069973 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
17 |
container_start_page |
9192 |
op_container_end_page |
9199 |
_version_ |
1801383613971824640 |