Objectives

1. WP15 Objectives  Quantification of air-sea CO2 fluxes in the Nordic Seas and Arctic Ocean under different climate condition scenarios  Role of high latitude shelf seas on preconditioning and modification of water masses prior to deep water formation  Quantification of feedback strength with respect to air-sea CO2 fluxes in the Southern Ocean under different idealized climate change scenarios D15.17 Assessment of changes in CO2 uptake resulting from changing ice cover and nutrient delivery (partner 32, month 54) D15.19 Assessment of the evolution of the CO2 system in Arctic Mediterranean and Eurasian Arctic seas over the period from 1990 to 2060 using a coupled physical-biogeochemical ocean model (partner 1, month 54) D15.20 Assessment of the sensitivity of the C cycle in the Southern Ocean to climate change by performing model integrations over time-scales of a century, using idealized scenarios derived from the output of coupled atmosphere-ocean model simulations (partner 3, month 48)

2. WP16 • Objectives •  To estimate the strength of feedback processes between increasing CO2 and air/sea fluxes induced by biogeochemical processes (marine biota, ecosystem structure, particle flux) • D16.13 Report on the testing of parameterizations of the temperature dependency of OM remineralization in a global biogeochemical ocean model (MPIOM/HAMOCC5) (month 54, P17) • D16.21 Progress report on the multi-model analysis of the effects of inter-annually varying physical and biogeochemical model fields driven by NCEP reanalysis (month 54, P3) • Data base on IAV runs proposed as a contribution to RECCAP model fields archived following protocol outlined for coupled models Participants: Bergen, MPI, AWI, LSCE, UEA (?) FINAL CT4 PRODUCT Review/synthesis article: identification and quantification of FB; their interconnexions, future evolution, upper limits etc; regional hot spots and potential monitoring