Biogeochemical data assimilation in Copernicus Marine Services - status and future evolution

The Copernicus Marine Services is operationally producing forecasts and reanalysis of biogeochemical properties such as nutrients, phytoplankton biomass and carbon chemistry, in the ocean. A key part of these model products is the assimilation of observed biogeochemical properties. Both the methods for assimilating biogeochemical observations and the observation systems are constantly evolving. In this talk we will give an overview over the present capabilities of biogeochemical data assimilation within the Copernicus Marine Services. Presently, biogeochemical data assimilation services cover a range of spatial scales, from global ocean to regional seas, methods, and observations assimilated, which are based both on in situ and remote satellite measurements. We will also present the future evolution that is presently being prepared and researched within Copernicus Marine Services as well as in research projects, such as H2020 SEAMLESS. This includes exploring the prospect of assimilating new types of observations from BGC-Argo, gliders and from remote sensing.  We will also present plans for moving towards ensemble assimilation and, given the tight connection between physical and biogeochemical variability, steps towards simultaneously constraining physical and biogeochemical model properties.