Biogeochemical modelling

The sea is exposed to environmental changes such as eutrophication, acidification and anoxia. In what way the marine environment will respond to changes in nutrient supply and changes in future climate is an urgent and scientifically challenging task.

The Marine Environment Group works mainly with research problems related to human and natural impacts on oceans caused by climate change and eutrophication. The research also aims to better understand the rapid changes that result in oxygen depletion and algae blooms. Physical and
biogeochemical models are important tools. Data from the marine environmental monitoring, satellite observations, etc. are used as a basis for model development.

The group works on the development of SMHI biogeochemical model SCOBI which is linked to the physical oceanographic circulation models RCO (Baltic Sea) and the NEMO-Nordic (Baltic and North Sea). Furthermore it is  part of the Swedish coastal zone model. The group also participates actively in the development of  innovative measurement methods, includingphytoplankton and ocean acidification. High-quality observations are essential for monitoring of the EU Marine Environment and the Water Framework Directive. Models and data are used for the study of marine environmental issues with the intention to provide a basis for marine environmental actions.

Development of the models includes continuous updating with new knowledge about relevant processes. In addition improved scenarios for anthropogenic eutrophication are developed to reduce uncertainty about the effects of future climate trends. To understand the climate and human impacts on the biogeochemical processes and the marine ecosystem, we aim to describe and understand the historical development of e.g. oxygen levels, nutrient dynamics, acidification, algal blooms. Sediment Processes, cyanobacteria life cycle and the coastal zone's importance for nutrient dynamics in the Baltic Sea are examples of current research as well as studies of carbon and methane dynamics in the Arctic and Baltic Sea.