EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Biologically driven variability in coastal carbon fluxes - A model study

Harshal Chavan and Inga Hense
Harshal Chavan and Inga Hense
  • University of Hamburg, Institute of Marine Ecosystem and Fishery Science, Department of Earth system science, Germany (

Benthic-pelagic coupling is responsible for the sudden appearance and disappearance of many coastal plankton blooms. Whether this signature is also reflected in pCO2 and whether the processes involved are important for the carbon fluxes in the coastal ocean is unclear. To address these questions, we use an ecosystem model that accounts for benthic-pelagic coupling of three different functional phytoplankton groups. Coupled with the water column model GOTM, we investigate the air-sea CO2 fluxes in the Baltic Sea and compared them with observations. We show that the variability is very well captured by the model. The relative importance of the life cycle processes in regulating carbon fluxes is demonstrated.

How to cite: Chavan, H. and Hense, I.: Biologically driven variability in coastal carbon fluxes - A model study, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-9026,, 2020