Budgeting air-ice-sea CO2, N2O and CH4 in the Arctic Ocean – Progress of the GreenFeedBack project

GreenFeedBack (https://eu-greenfeedback.com/) is an EU-funded Research and Innovation Action that aims to investigate knowledge of greenhouse gas dynamics within human and environmental systems and provide a solid basis for estimating regional and global climate feedback processes, taking human pressure across ecosystems into account. GreenFeedBack is investigating Arctic land, freshwater and marine systems. We will present recent achievements of the marine work package of GreenFeedBack, including an up-to-date budget of atmospheric CO2 uptake by the Arctic Ocean that includes the ice components in multiple aspects (e.g. impact on air-sea fluxes, air-ice direct fluxes). Recent findings related to CH4 and N2O for the Arctic Ocean will also be presented.