Papers are solicited on the advances in oceanographic applications of GRACE and GRACE-FO data products, including signal interpretation and model assimilation. Other topics include, but are not limited to, the validation of data products, the studies of regional or global oceanographic processes, exploitation of GRACE and GRACE-FO data products jointly with data from other missions (such as GOCE), or other in situ oceanographic measurement systems (e.g. ARGO), etc.