Chromophoric dissolved organic matter dynamics revealed through the optimization of an optical–biogeochemical model in the northwestern Mediterranean Sea

Álvarez, Eva; Cossarini, Gianpiero; Teruzzi, Anna; Bruggeman, Jorn; Bolding, Karsten; Ciavatta, Stefano; Vellucci, Vincenzo; D'Ortenzio, Fabrizio; Antoine, David; Lazzari, Paolo

doi:https://doi.org/10.5194/bg-20-4591-2023

Articles | Volume 20, issue 22

https://doi.org/10.5194/bg-20-4591-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-20-4591-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 22

Research article

|

24 Nov 2023

Research article |

| 24 Nov 2023

Chromophoric dissolved organic matter dynamics revealed through the optimization of an optical–biogeochemical model in the northwestern Mediterranean Sea

Eva Álvarez, Gianpiero Cossarini, Anna Teruzzi, Jorn Bruggeman, Karsten Bolding, Stefano Ciavatta, Vincenzo Vellucci, Fabrizio D'Ortenzio, David Antoine, and Paolo Lazzari

Data sets

1D setup BOUSSOLE site Lazzari, P.; Teruzzi, A.; Cossarini, G.; Álvarez, E.; Bruggeman, J. https://github.com/ealvarez-s/setup_BFM1D_CDOM.git

Results of the numerical simulations Álvarez, E. https://doi.org/10.5281/zenodo.7628060

Scripts for data analysis and visualization Álvarez, E. https://github.com/ealvarez-s/results_BFM_CDOM.git

Model code and software

Biogeochemical Flux Model (BFM) under FABM convention Lazzari, P.; Teruzzi, A.; Cossarini, G.; Álvarez, E.; Bruggeman, J. https://github.com/inogs/bfmforfabm.git

Framework for aquatic biogeochemical models (FABM) Bruggeman, J. and Bolding, K. https://github.com/fabm-model/fabm.git

Parallel sensitivity analysis and calibration (ParSAC) Bruggeman, J. and Bolding, K. https://doi.org/10.5281/zenodo.4280520

Short summary

Chromophoric dissolved organic matter (CDOM) interacts with the ambient light and gives the waters of the Mediterranean Sea their colour. We propose a novel parameterization of the CDOM cycle, whose parameter values have been optimized by using the data of the monitoring site BOUSSOLE. Nutrient and light limitations for locally produced CDOM caused a_CDOM(λ) to covary with chlorophyll, while the above-average CDOM concentrations observed at this site were maintained by allochthonous sources.