This WP focuses on marine biogeochemical processes involved in Earth system feedbacks and aims to improve their representation in ESMs. We will improve the representation of air-sea CO2 fluxes and the overall ocean carbon cycle, as well as explicitly include marine emissions of some climate-active species (N2O, DMS, VOCs). To guide the choice of target processes, we rely on the recent IPCC 5th assessment report (IPCC, 2013) that identifies; small-scale ocean physics, coastal ocean processes, variable nutrient ratios and loss processes of marine organic matter, interactive atmospheric deposition and riverine input of key fertilizing species as among the most important processes missing or poorly represented in marine biogeochemical models.
The WP is linked with WP5 through the use of constrained ocean simulations and process-level evaluation of the target marine ESM components. Regular interaction will occur with WP3 where atmospheric emission/deposition of marine gases and aerosols is addressed. The WP will contribute to OCMIP and C4MIP.