Explore a comprehensive conference session on data assimilation in geosciences from the 2012 AGU Fall Meeting. Delve into topics including hybrid ensemble-variational data assimilation for numerical weather prediction, land surface data assimilation, model error representation in convective-scale ensembles, data assimilation for applied meteorology, and correction of bathymetry using adjoint components. Learn about simultaneous data assimilation of CO2 and meteorological variables, as well as ensemble data assimilation in the wind industry. Gain insights from invited speakers and various presenters on cutting-edge techniques and applications in this critical field of geosciences.