Climate change impact the marine arctic environment trough changes in ice cover, ice thickness, irradiance, freshwater outflow, concentrations of nutrients and CO2 and the stratification. These factors determine the production, seasonality and fate of the planktonic primary production in the marine ecosystem. Plankton is fuelling stocks of fish, marine birds and mammals and trough that constitute the base of the Greenlandic economy. The aim of the project is trough field and laboratory experiments to gain knowledge about the interaction between climate, oceanography and plankton in the vulnerable Greenlandic marine ecosystem. The project is interdisciplinary and closely coordinated with the other projects under the Climate centre.