FN Archimer Export Format
PT J
TI Reconstructing the ocean’s mesopelagic zone carbon budget: sensitivity and estimation of parameters associated with prokaryotic remineralization
BT 
AF Baumas, Chloé
   Fuchs, Robin
   Garel, Marc
   Poggiale, Jean-Christophe
   Memery, Laurent
   Le Moigne, Frédéric A. C.
   Tamburini, Christian
AS 1:1;2:1,2;3:1;4:1;5:;6:1,3;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
   Aix Marseille Univ, CNRS, I2M, Marseille, France
   LEMAR Laboratoire des Sciences de l’Environnement Marin, UMR6539, CNRS, UBO, IFREMER, IRD, Plouzané, Technopôle Brest-Iroise, France
C2 UNIV AIX MARSEILLE, FRANCE
   UNIV AIX MARSEILLE, FRANCE
   CNRS, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
IF 4.9
TC 0
UR https://archimer.ifremer.fr/doc/00821/93311/100008.pdf
   https://archimer.ifremer.fr/doc/00821/93311/105411.pdf
   https://archimer.ifremer.fr/doc/00821/93311/105412.pdf
   https://archimer.ifremer.fr/doc/00821/93311/105413.pdf
LA English
DT Article
CR PEACETIME
BO Pourquoi pas ?
AB 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 CO2 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 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, the prokaryotic production, and the zooplankton respirations. The consistency of the resulting C-budget suggests that such budgets can be adequately balanced when using appropriate parameters. 
PY 2023
PD OCT
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 20
IS 19
UT 001161777800001
BP 4165
EP 4182
DI 10.5194/bg-20-4165-2023
ID 93311
ER

EF