[en] This study describes the coupling of the process-based Model of Early Diagenesis in the Upper Sediment (MEDUSA version 2) to an existing ocean biogeochemistry model consisting of the Finite-volumE Sea ice-Ocean Model (FESOM version 2.1) and the Regulated Ecosystem Model (REcoM version 3). Atmospheric CO2 in the model is a prognostic variable which is determined by the carbonate chemistry in the surface ocean. The model setup and its application to a pre-industrial control climate state is described in detail. In the coupled model 400 PgC are stored in equilibrium in the top 10 cm of the bioturbated sediment, mainly as calcite, but also to 5 % as organic matter. Simulated atmospheric CO2 is in equilibrium at 286 ppm in the coupled simulation, which is close to the initially assumed value of the pre-industrial CO2 level. Sediment burial of carbon, alkalinity and nutrients in the coupled simulation is set to be partly compensated by riverine input. The spatial distribution of biological production is altered depending on the location of riverine input and the strength of local nutrient limitation, while the global productivity is not affected substantially.
Research Center/Unit :
SPHERES - ULiège Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) MARUM — Center for Marine Environmental Sciences
Disciplines :
Earth sciences & physical geography
Author, co-author :
Ye, Ying
Munhoven, Guy ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Köhler, Peter
Butzin, Martin
Hauck, Judith
Gürses, Özgür
Völker, Christoph
Language :
English
Title :
FESOM2.1-REcoM3-MEDUSA2: an ocean-sea ice-biogeochemistry model coupled to a sediment model
Publication date :
06 September 2023
Journal title :
Geoscientific Model Development Discussions
eISSN :
1991-962X
Publisher :
Copernicus GmbH, Germany
Peer reviewed :
Editorial reviewed
Name of the research project :
PalMod MARCARA MarESys SERENATA
Funders :
BMBF - Bundesministerium für Bildung und Forschung DFG - Deutsche Forschungsgemeinschaft HGF - Helmholtz Association of German Research Centres F.R.S.-FNRS - Fonds de la Recherche Scientifique
Funding number :
01LP1919A; VH-NG-1301; J.0123.19
Funding text :
YY, PK, CV and MB are supported by the German Federal Ministry of Education and Research (BMBF), as Research
for Sustainability initiative (FONA); www.fona.de through the PalMod project (grant number: 01LP1919A). M.B. is additionally funded through DFG-ANR project MARCARA. JH and ÖG were funded by the Initiative and Networking Fund of the Helmholtz Association (Helmholtz Young Investigator Group Marine Carbon and Ecosystem Feedbacks in the Earth System [MarESys], grant number VH-NG-1301). Financial support for GM’s work on MEDUSA was provided by the Belgian Fund for Scientific Research – F.R.S.-FNRS (project SERENATA, grant no. CDR J.0123.19). GM is a Research Associate with the Belgian Fund for Scientific Research – F.R.S.-FNRS.
