Vertical Mixing Effects on Phytoplankton Dynamics and Organic Carbon Export in the Western Mediterranean Sea.
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| Title: | Vertical Mixing Effects on Phytoplankton Dynamics and Organic Carbon Export in the Western Mediterranean Sea. |
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| Authors: | Kessouri, Faycal1,2,3 kesf@ucla.edu, Ulses, Caroline1, Estournel, Claude1, Marsaleix, Patrick1, D'Ortenzio, Fabrizio4, Severin, Tatiana5,6, Taillandier, Vincent4, Conan, Pascal6 |
| Source: | Journal of Geophysical Research. Oceans. Mar2018, Vol. 123 Issue 3, p1647-1669. 23p. |
| Abstract: | Abstract: A 3‐D high‐resolution coupled hydrodynamic‐biogeochemical model of the western Mediterranean was used to study phytoplankton dynamics and organic carbon export in three regions with contrasting vertical regimes, ranging from deep convection to a shallow mixed layer. One month after the initial increase in surface chlorophyll (caused by the erosion of the deep chlorophyll maximum), the autumnal bloom was triggered in all three regions by the upward flux of nutrients resulting from mixed layer deepening. In contrast, at the end of winter, the end of turbulent mixing favored the onset of the spring bloom in the deep convection region. Low grazing pressure allowed rapid phytoplankton growth during the bloom. Primary production in the shallow mixed layer region, the Algerian subbasin, was characterized by a long period (4 months) of sustained phytoplankton development, unlike the deep convection region where primary production was inhibited during 2 months in winter. Despite seasonal variations, annual primary production in all three regions is similar. In the deep convection region, total organic carbon export below the photic layer (150 m) and transfer to deep waters (800 m) was 5 and 8 times, respectively, higher than in the Algerian subbasin. Although some of the exported material will be injected back into the surface layer during the next convection event, lateral transport, and strong interannual variability of MLD in this region suggest that a significant amount of exported material is effectively sequestrated. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Oceans is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 129323724 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Vertical Mixing Effects on Phytoplankton Dynamics and Organic Carbon Export in the Western Mediterranean Sea. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kessouri%2C+Faycal%22">Kessouri, Faycal</searchLink><relatesTo>1,2,3</relatesTo><i> kesf@ucla.edu</i><br /><searchLink fieldCode="AR" term="%22Ulses%2C+Caroline%22">Ulses, Caroline</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Estournel%2C+Claude%22">Estournel, Claude</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Marsaleix%2C+Patrick%22">Marsaleix, Patrick</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22D'Ortenzio%2C+Fabrizio%22">D'Ortenzio, Fabrizio</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Severin%2C+Tatiana%22">Severin, Tatiana</searchLink><relatesTo>5,6</relatesTo><br /><searchLink fieldCode="AR" term="%22Taillandier%2C+Vincent%22">Taillandier, Vincent</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Conan%2C+Pascal%22">Conan, Pascal</searchLink><relatesTo>6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Oceans%22">Journal of Geophysical Research. Oceans</searchLink>. Mar2018, Vol. 123 Issue 3, p1647-1669. 23p. – Name: Abstract Label: Abstract Group: Ab Data: Abstract: A 3‐D high‐resolution coupled hydrodynamic‐biogeochemical model of the western Mediterranean was used to study phytoplankton dynamics and organic carbon export in three regions with contrasting vertical regimes, ranging from deep convection to a shallow mixed layer. One month after the initial increase in surface chlorophyll (caused by the erosion of the deep chlorophyll maximum), the autumnal bloom was triggered in all three regions by the upward flux of nutrients resulting from mixed layer deepening. In contrast, at the end of winter, the end of turbulent mixing favored the onset of the spring bloom in the deep convection region. Low grazing pressure allowed rapid phytoplankton growth during the bloom. Primary production in the shallow mixed layer region, the Algerian subbasin, was characterized by a long period (4 months) of sustained phytoplankton development, unlike the deep convection region where primary production was inhibited during 2 months in winter. Despite seasonal variations, annual primary production in all three regions is similar. In the deep convection region, total organic carbon export below the photic layer (150 m) and transfer to deep waters (800 m) was 5 and 8 times, respectively, higher than in the Algerian subbasin. Although some of the exported material will be injected back into the surface layer during the next convection event, lateral transport, and strong interannual variability of MLD in this region suggest that a significant amount of exported material is effectively sequestrated. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Oceans is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/2016JC012669 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 1647 Titles: – TitleFull: Vertical Mixing Effects on Phytoplankton Dynamics and Organic Carbon Export in the Western Mediterranean Sea. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kessouri, Faycal – PersonEntity: Name: NameFull: Ulses, Caroline – PersonEntity: Name: NameFull: Estournel, Claude – PersonEntity: Name: NameFull: Marsaleix, Patrick – PersonEntity: Name: NameFull: D'Ortenzio, Fabrizio – PersonEntity: Name: NameFull: Severin, Tatiana – PersonEntity: Name: NameFull: Taillandier, Vincent – PersonEntity: Name: NameFull: Conan, Pascal IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 21699275 Numbering: – Type: volume Value: 123 – Type: issue Value: 3 Titles: – TitleFull: Journal of Geophysical Research. Oceans Type: main |
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