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Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean

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dc.contributor.author Nicholson, Sarah-Anne
dc.contributor.author Lévy, M
dc.contributor.author Llort, J
dc.contributor.author Swart, S
dc.contributor.author Monteiro, Pedro MS
dc.date.accessioned 2018-02-26T13:08:25Z
dc.date.available 2018-02-26T13:08:25Z
dc.date.issued 2016-09
dc.identifier.citation 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 en_US
dc.identifier.issn 0094-8276
dc.identifier.uri DOI: 10.1002/2016GL069973
dc.identifier.uri http://onlinelibrary.wiley.com/doi/10.1002/2016GL069973/full
dc.identifier.uri http://hdl.handle.net/10204/10065
dc.description Article published in Geophysical Research Letters, vol. 43(17): 9192-9199 en_US
dc.description.abstract 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. en_US
dc.language.iso en en_US
dc.publisher American Geophysical Union en_US
dc.relation.ispartofseries Worklist;20230
dc.relation.ispartofseries Worklist;20216
dc.subject Control runs en_US
dc.subject SXLD Deepening Runs en_US
dc.subject Sub-Antarctic Ocean en_US
dc.subject Surface-mixing layer en_US
dc.subject Subsurface Mixing Runs en_US
dc.title Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean en_US
dc.type Article en_US
dc.identifier.apacitation Nicholson, S., Lévy, M., Llort, J., Swart, S., & Monteiro, P. M. (2016). Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean. http://hdl.handle.net/10204/10065 en_ZA
dc.identifier.chicagocitation Nicholson, Sarah-Anne, M Lévy, J Llort, S Swart, and Pedro MS Monteiro "Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean." (2016) http://hdl.handle.net/10204/10065 en_ZA
dc.identifier.vancouvercitation Nicholson S, Lévy M, Llort J, Swart S, Monteiro PM. Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean. 2016; http://hdl.handle.net/10204/10065. en_ZA
dc.identifier.ris TY - Article AU - Nicholson, Sarah-Anne AU - Lévy, M AU - Llort, J AU - Swart, S AU - Monteiro, Pedro MS AB - 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. DA - 2016-09 DB - ResearchSpace DP - CSIR KW - Control runs KW - SXLD Deepening Runs KW - Sub-Antarctic Ocean KW - Surface-mixing layer KW - Subsurface Mixing Runs LK - https://researchspace.csir.co.za PY - 2016 SM - 0094-8276 T1 - Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean TI - Investigation into the impact of storms on sustaining summer primary productivity in the Sub-Antarctic Ocean UR - http://hdl.handle.net/10204/10065 ER - en_ZA


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