Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya
Abstract The Ross Sea polynya is one of the most productive regions in the Southern Ocean. However, limited access and high spatio-temporal variability of physical and biological processes limit the use of conventional oceanographic methods to measure early season primary productivity. High-resoluti...
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crcambridgeupr:10.1017/s0954102014000881 2024-06-23T07:48:03+00:00 Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya Queste, Bastien Y. Heywood, Karen J. Smith, Walker O. Kaufman, Daniel E. Jickells, Timothy D. Dinniman, Michael S. 2015 http://dx.doi.org/10.1017/s0954102014000881 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102014000881 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/3.0/ Antarctic Science volume 27, issue 4, page 362-372 ISSN 0954-1020 1365-2079 journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0954102014000881 2024-05-29T08:09:45Z Abstract The Ross Sea polynya is one of the most productive regions in the Southern Ocean. However, limited access and high spatio-temporal variability of physical and biological processes limit the use of conventional oceanographic methods to measure early season primary productivity. High-resolution observations from two Seagliders provide insights into the timing of a bloom in the southern Ross Sea polynya in December 2010. Changes in chlorophyll and oxygen concentrations are used to assess bloom dynamics. Using a ratio of dissolved oxygen to carbon, net primary production is estimated over the duration of the bloom showing a sensitive balance between net autotrophy and heterotrophy. The two gliders, observing spatially distinct regions during the same period, found net community production rates of -0.9±0.7 and 0.7±0.4 g C m -2 d -1 . The difference highlights the spatial variability of biological processes and is probably caused by observing different stages of the bloom. The challenge of obtaining accurate primary productivity estimates highlights the need for increased observational efforts, particularly focusing on subsurface processes not resolved using surface or remote observations. Without an increased observational effort and the involvement of emerging technologies, it will not be possible to determine the seasonal trophic balance of the Ross Sea polynya and quantify the shelf’s importance in carbon export. Article in Journal/Newspaper Antarctic Science Ross Sea Southern Ocean Cambridge University Press Ross Sea Southern Ocean Antarctic Science 27 4 362 372 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract The Ross Sea polynya is one of the most productive regions in the Southern Ocean. However, limited access and high spatio-temporal variability of physical and biological processes limit the use of conventional oceanographic methods to measure early season primary productivity. High-resolution observations from two Seagliders provide insights into the timing of a bloom in the southern Ross Sea polynya in December 2010. Changes in chlorophyll and oxygen concentrations are used to assess bloom dynamics. Using a ratio of dissolved oxygen to carbon, net primary production is estimated over the duration of the bloom showing a sensitive balance between net autotrophy and heterotrophy. The two gliders, observing spatially distinct regions during the same period, found net community production rates of -0.9±0.7 and 0.7±0.4 g C m -2 d -1 . The difference highlights the spatial variability of biological processes and is probably caused by observing different stages of the bloom. The challenge of obtaining accurate primary productivity estimates highlights the need for increased observational efforts, particularly focusing on subsurface processes not resolved using surface or remote observations. Without an increased observational effort and the involvement of emerging technologies, it will not be possible to determine the seasonal trophic balance of the Ross Sea polynya and quantify the shelf’s importance in carbon export. |
format |
Article in Journal/Newspaper |
author |
Queste, Bastien Y. Heywood, Karen J. Smith, Walker O. Kaufman, Daniel E. Jickells, Timothy D. Dinniman, Michael S. |
spellingShingle |
Queste, Bastien Y. Heywood, Karen J. Smith, Walker O. Kaufman, Daniel E. Jickells, Timothy D. Dinniman, Michael S. Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
author_facet |
Queste, Bastien Y. Heywood, Karen J. Smith, Walker O. Kaufman, Daniel E. Jickells, Timothy D. Dinniman, Michael S. |
author_sort |
Queste, Bastien Y. |
title |
Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
title_short |
Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
title_full |
Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
title_fullStr |
Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
title_full_unstemmed |
Dissolved oxygen dynamics during a phytoplankton bloom in the Ross Sea polynya |
title_sort |
dissolved oxygen dynamics during a phytoplankton bloom in the ross sea polynya |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0954102014000881 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102014000881 |
geographic |
Ross Sea Southern Ocean |
geographic_facet |
Ross Sea Southern Ocean |
genre |
Antarctic Science Ross Sea Southern Ocean |
genre_facet |
Antarctic Science Ross Sea Southern Ocean |
op_source |
Antarctic Science volume 27, issue 4, page 362-372 ISSN 0954-1020 1365-2079 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1017/s0954102014000881 |
container_title |
Antarctic Science |
container_volume |
27 |
container_issue |
4 |
container_start_page |
362 |
op_container_end_page |
372 |
_version_ |
1802638454084861952 |