High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data
Copyright: 2015 Oxford University Press. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in ICES Journal of Marine Sci...
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ftcsir:oai:researchspace.csir.co.za:10204/8749 2023-05-15T17:35:50+02:00 High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data Thomalla, Sandy J Racault, M Swart, S Monteiro, Pedro MS 2015-07 application/pdf http://hdl.handle.net/10204/8749 http://icesjms.oxfordjournals.org/content/72/6/1999 en eng Oxford University Press Workflow;15297 Thomalla, S.J., Racault, M., Swart, S. and Monteiro, P.M.S. 2015. High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data. In: ICES Journal of Marine Science, vol 72(6), pp. 1999-2020 1054-3139 http://icesjms.oxfordjournals.org/content/72/6/1999 http://hdl.handle.net/10204/8749 Bloom initiation Glider Net community production Primary production Respiration Subantarctic Sverdrup critical depth model Article 2015 ftcsir 2022-05-19T06:13:52Z Copyright: 2015 Oxford University Press. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in ICES Journal of Marine Science, vol 72(6), pp. 1999-2020 In the Southern Ocean, there is increasing evidence that seasonal to subseasonal temporal scales, and meso- to submesoscales play an important role in understanding the sensitivity of ocean primary productivity to climate change. This drives the need for a high-resolution approach to resolving biogeochemical processes. In this study, 5.5 months of continuous, high-resolution (3 h, 2 km horizontal resolution) glider data from spring to summer in the Atlantic Subantarctic Zone is used to investigate: (i) the mechanisms that drive bloom initiation and high growth rates in the region and (ii) the seasonal evolution of water column production and respiration. Bloom initiation dates were analysed in the context of upper ocean boundary layer physics highlighting sensitivities of different bloom detection methods to different environmental processes. Model results show that in early spring (September to mid-November) increased rates of net community production (NCP) are strongly affected by meso- to submesoscale features. In late spring/early summer (late-November to mid December) seasonal shoaling of the mixed layer drives a more spatially homogenous bloom with maximum rates of NCP and chlorophyll biomass. A comparison of biomass accumulation rates with a study in the North Atlantic highlights the sensitivity of phytoplankton growth to fine-scale dynamics and emphasizes the need to sample the ocean at high resolution to accurately resolve phytoplankton phenology and improve our ability to estimate the sensitivity of the biological carbonpump to climate change. Article in Journal/Newspaper North Atlantic Southern Ocean Council for Scientific and Industrial Research (South Africa): CSIR Research Space Southern Ocean |
institution |
Open Polar |
collection |
Council for Scientific and Industrial Research (South Africa): CSIR Research Space |
op_collection_id |
ftcsir |
language |
English |
topic |
Bloom initiation Glider Net community production Primary production Respiration Subantarctic Sverdrup critical depth model |
spellingShingle |
Bloom initiation Glider Net community production Primary production Respiration Subantarctic Sverdrup critical depth model Thomalla, Sandy J Racault, M Swart, S Monteiro, Pedro MS High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
topic_facet |
Bloom initiation Glider Net community production Primary production Respiration Subantarctic Sverdrup critical depth model |
description |
Copyright: 2015 Oxford University Press. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in ICES Journal of Marine Science, vol 72(6), pp. 1999-2020 In the Southern Ocean, there is increasing evidence that seasonal to subseasonal temporal scales, and meso- to submesoscales play an important role in understanding the sensitivity of ocean primary productivity to climate change. This drives the need for a high-resolution approach to resolving biogeochemical processes. In this study, 5.5 months of continuous, high-resolution (3 h, 2 km horizontal resolution) glider data from spring to summer in the Atlantic Subantarctic Zone is used to investigate: (i) the mechanisms that drive bloom initiation and high growth rates in the region and (ii) the seasonal evolution of water column production and respiration. Bloom initiation dates were analysed in the context of upper ocean boundary layer physics highlighting sensitivities of different bloom detection methods to different environmental processes. Model results show that in early spring (September to mid-November) increased rates of net community production (NCP) are strongly affected by meso- to submesoscale features. In late spring/early summer (late-November to mid December) seasonal shoaling of the mixed layer drives a more spatially homogenous bloom with maximum rates of NCP and chlorophyll biomass. A comparison of biomass accumulation rates with a study in the North Atlantic highlights the sensitivity of phytoplankton growth to fine-scale dynamics and emphasizes the need to sample the ocean at high resolution to accurately resolve phytoplankton phenology and improve our ability to estimate the sensitivity of the biological carbonpump to climate change. |
format |
Article in Journal/Newspaper |
author |
Thomalla, Sandy J Racault, M Swart, S Monteiro, Pedro MS |
author_facet |
Thomalla, Sandy J Racault, M Swart, S Monteiro, Pedro MS |
author_sort |
Thomalla, Sandy J |
title |
High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
title_short |
High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
title_full |
High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
title_fullStr |
High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
title_full_unstemmed |
High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data |
title_sort |
high-resolution view of the spring bloom initiation and net community production in the subantarctic southern ocean using glider data |
publisher |
Oxford University Press |
publishDate |
2015 |
url |
http://hdl.handle.net/10204/8749 http://icesjms.oxfordjournals.org/content/72/6/1999 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_relation |
Workflow;15297 Thomalla, S.J., Racault, M., Swart, S. and Monteiro, P.M.S. 2015. High-resolution view of the spring bloom initiation and net community production in the Subantarctic Southern Ocean using glider data. In: ICES Journal of Marine Science, vol 72(6), pp. 1999-2020 1054-3139 http://icesjms.oxfordjournals.org/content/72/6/1999 http://hdl.handle.net/10204/8749 |
_version_ |
1766135118951350272 |