Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles
Diatoms with their fast growth rates and obligate requirement for Si have a unique relationship to the oceanic Si cycle with the potential for controlling the nutrient and CO2 environment of large important areas of the ocean. The new production of diatoms based on both new nitrogen and Si sources i...
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ftjscientiamarin:oai:scientiamarina.revistas.csic.es:article/688 2023-05-15T13:41:51+02:00 Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles Dugdale, R. C. Wilkerson, F. P. 2001-12-30 application/pdf https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688 https://doi.org/10.3989/scimar.2001.65s2141 eng eng Consejo Superior de Investigaciones Científicas https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688/704 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688 doi:10.3989/scimar.2001.65s2141 Copyright (c) 2001 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 CC-BY Scientia Marina; Vol. 65 No. S2 (2001); 141-152 Scientia Marina; Vol. 65 Núm. S2 (2001); 141-152 1886-8134 0214-8358 10.3989/scimar.2001.65s2 silicon nitrogen phytoplankton diatom carbon productivity Equatorial Pacific Southern Ocean paleoclimatology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed article Artículo revisado por pares 2001 ftjscientiamarin https://doi.org/10.3989/scimar.2001.65s2141 https://doi.org/10.3989/scimar.2001.65s2 2022-03-20T16:30:39Z Diatoms with their fast growth rates and obligate requirement for Si have a unique relationship to the oceanic Si cycle with the potential for controlling the nutrient and CO2 environment of large important areas of the ocean. The new production of diatoms based on both new nitrogen and Si sources is described using a Si-pump based upon the differential regeneration of the two elements. This approach, applied to the eastern equatorial Pacific, showed diatoms to respond as in a Si-limited chemostat, to the low source Si(OH)4 in the Equatorial UnderCurrent. Increased Si(OH)4 results in increased diatom productivity, suppression of non-diatom populations and decreased surface pCO2. The deficiency in source concentrations of Si(OH)4 results from low Si(OH)4:NO3 water originating in the vicinity of the Antarctic Polar Front, a consequence of the extraordinary trapping of Si by the Southern Ocean. In glacial periods this trapping is reduced several fold and likely results in increased Si(OH)4 export to the north, and increased Si(OH)4 production and deposition at the equatorial Pacific which can be expected to reduce surface pCO2. The connections between the eastern equatorial Pacific export production and Southern Ocean Si trapping may provide a major biogeochemical feedback system with implications for contemporary and paleoclimatology. No disponible. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Scientia Marina (E-Journal) Antarctic Southern Ocean The Antarctic Pacific Scientia Marina 65 S2 141 152 |
institution |
Open Polar |
collection |
Scientia Marina (E-Journal) |
op_collection_id |
ftjscientiamarin |
language |
English |
topic |
silicon nitrogen phytoplankton diatom carbon productivity Equatorial Pacific Southern Ocean paleoclimatology |
spellingShingle |
silicon nitrogen phytoplankton diatom carbon productivity Equatorial Pacific Southern Ocean paleoclimatology Dugdale, R. C. Wilkerson, F. P. Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
topic_facet |
silicon nitrogen phytoplankton diatom carbon productivity Equatorial Pacific Southern Ocean paleoclimatology |
description |
Diatoms with their fast growth rates and obligate requirement for Si have a unique relationship to the oceanic Si cycle with the potential for controlling the nutrient and CO2 environment of large important areas of the ocean. The new production of diatoms based on both new nitrogen and Si sources is described using a Si-pump based upon the differential regeneration of the two elements. This approach, applied to the eastern equatorial Pacific, showed diatoms to respond as in a Si-limited chemostat, to the low source Si(OH)4 in the Equatorial UnderCurrent. Increased Si(OH)4 results in increased diatom productivity, suppression of non-diatom populations and decreased surface pCO2. The deficiency in source concentrations of Si(OH)4 results from low Si(OH)4:NO3 water originating in the vicinity of the Antarctic Polar Front, a consequence of the extraordinary trapping of Si by the Southern Ocean. In glacial periods this trapping is reduced several fold and likely results in increased Si(OH)4 export to the north, and increased Si(OH)4 production and deposition at the equatorial Pacific which can be expected to reduce surface pCO2. The connections between the eastern equatorial Pacific export production and Southern Ocean Si trapping may provide a major biogeochemical feedback system with implications for contemporary and paleoclimatology. No disponible. |
format |
Article in Journal/Newspaper |
author |
Dugdale, R. C. Wilkerson, F. P. |
author_facet |
Dugdale, R. C. Wilkerson, F. P. |
author_sort |
Dugdale, R. C. |
title |
Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
title_short |
Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
title_full |
Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
title_fullStr |
Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
title_full_unstemmed |
Sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
title_sort |
sources and fates of silicon in the ocean: the role of diatoms in the climate and glacial cycles |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
2001 |
url |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688 https://doi.org/10.3989/scimar.2001.65s2141 |
geographic |
Antarctic Southern Ocean The Antarctic Pacific |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Scientia Marina; Vol. 65 No. S2 (2001); 141-152 Scientia Marina; Vol. 65 Núm. S2 (2001); 141-152 1886-8134 0214-8358 10.3989/scimar.2001.65s2 |
op_relation |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688/704 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/688 doi:10.3989/scimar.2001.65s2141 |
op_rights |
Copyright (c) 2001 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3989/scimar.2001.65s2141 https://doi.org/10.3989/scimar.2001.65s2 |
container_title |
Scientia Marina |
container_volume |
65 |
container_issue |
S2 |
container_start_page |
141 |
op_container_end_page |
152 |
_version_ |
1766159239114391552 |