Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization
<p>Through the constant rain of sinking marine particles in the ocean, carbon (C) trapped within is exported into the water column and sequestered when reaching depths below the mesopelagic zone. Atmospheric CO<span class="inline-formula"><sub>2</sub></span> l...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-10-01
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| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/20/4165/2023/bg-20-4165-2023.pdf |
| _version_ | 1797661321793110016 |
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| author | C. Baumas R. Fuchs R. Fuchs M. Garel J.-C. Poggiale L. Memery F. A. C. Le Moigne F. A. C. Le Moigne C. Tamburini |
| author_facet | C. Baumas R. Fuchs R. Fuchs M. Garel J.-C. Poggiale L. Memery F. A. C. Le Moigne F. A. C. Le Moigne C. Tamburini |
| author_sort | C. Baumas |
| collection | DOAJ |
| description | <p>Through the constant rain of sinking marine particles in the ocean, carbon
(C) trapped within is exported into the water column and sequestered when
reaching depths below the mesopelagic zone. Atmospheric CO<span class="inline-formula"><sub>2</sub></span> levels are
thereby strongly related to the magnitude of carbon export fluxes in the
mesopelagic zone. Sinking particles represent the main source of carbon and
energy for mesopelagic organisms, attenuating the C export flux along the
water column. Attempts to quantify the amount of C exported versus C consumed
by heterotrophic organisms have increased in recent decades. Yet, most of
the conducted estimations have led to estimated C demands several times
higher than the measured C export fluxes. The choice of parameters such as
growth efficiencies or various conversion factors is known to greatly impact
the resulting C budget. In parallel, field or experimental data are sorely
lacking to obtain accurate values of these crucial overlooked parameters. In
this study, we identify the most influential of these parameters and perform
inversion of a mechanistic model. Further, we determine the optimal
parameter values as the ones that best explain the observed prokaryotic
respiration, prokaryotic production and zooplankton respiration. The
consistency of the resulting C budget suggests that such budgets can be
adequately balanced when using appropriate parameters.</p> |
| first_indexed | 2024-03-11T18:42:49Z |
| format | Article |
| id | doaj.art-78cd0ebcdb554d4c886fe2915fdb6a45 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-03-11T18:42:49Z |
| publishDate | 2023-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-78cd0ebcdb554d4c886fe2915fdb6a452023-10-12T07:52:13ZengCopernicus PublicationsBiogeosciences1726-41701726-41892023-10-01204165418210.5194/bg-20-4165-2023Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralizationC. Baumas0R. Fuchs1R. Fuchs2M. Garel3J.-C. Poggiale4L. Memery5F. A. C. Le Moigne6F. A. C. Le Moigne7C. Tamburini8MIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, FranceMIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, FranceI2M, Aix Marseille Univ., CNRS, Marseille, FranceMIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, FranceMIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, FranceLEMAR Laboratoire des Sciences de l’Environnement Marin, UMR6539, CNRS, UBO, IFREMER, IRD, Plouzané, Technopôle Brest-Iroise, Brest, FranceMIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, FranceLEMAR Laboratoire des Sciences de l’Environnement Marin, UMR6539, CNRS, UBO, IFREMER, IRD, Plouzané, Technopôle Brest-Iroise, Brest, FranceMIO UM 110, Aix Marseille Univ., Université de Toulon, CNRS, IRD, Marseille, France<p>Through the constant rain of sinking marine particles in the ocean, carbon (C) trapped within is exported into the water column and sequestered when reaching depths below the mesopelagic zone. Atmospheric CO<span class="inline-formula"><sub>2</sub></span> levels are thereby strongly related to the magnitude of carbon export fluxes in the mesopelagic zone. Sinking particles represent the main source of carbon and energy for mesopelagic organisms, attenuating the C export flux along the water column. Attempts to quantify the amount of C exported versus C consumed by heterotrophic organisms have increased in recent decades. Yet, most of the conducted estimations have led to estimated C demands several times higher than the measured C export fluxes. The choice of parameters such as growth efficiencies or various conversion factors is known to greatly impact the resulting C budget. In parallel, field or experimental data are sorely lacking to obtain accurate values of these crucial overlooked parameters. In this study, we identify the most influential of these parameters and perform inversion of a mechanistic model. Further, we determine the optimal parameter values as the ones that best explain the observed prokaryotic respiration, prokaryotic production and zooplankton respiration. The consistency of the resulting C budget suggests that such budgets can be adequately balanced when using appropriate parameters.</p>https://bg.copernicus.org/articles/20/4165/2023/bg-20-4165-2023.pdf |
| spellingShingle | C. Baumas R. Fuchs R. Fuchs M. Garel J.-C. Poggiale L. Memery F. A. C. Le Moigne F. A. C. Le Moigne C. Tamburini Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization Biogeosciences |
| title | Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization |
| title_full | Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization |
| title_fullStr | Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization |
| title_full_unstemmed | Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization |
| title_short | Reconstructing the ocean's mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization |
| title_sort | reconstructing the ocean s mesopelagic zone carbon budget sensitivity and estimation of parameters associated with prokaryotic remineralization |
| url | https://bg.copernicus.org/articles/20/4165/2023/bg-20-4165-2023.pdf |
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