SEAMLESS Public release and full documentation of the SEAMLESS prototype. D2.4

This document presents the SEAMLESS prototype: the Ensemble and Assimilation Tool (EAT), which is a flexible and extensible software package that enables data assimilation of physical and biogeochemical variables in a one-dimensional water column.

EAT builds on established open-source components for ocean physics (GOTM), biogeochemistry (FABM) and data assimilation (PDAF). It is easy to install and operate, and flexible through support for user-written plugins. With full support for strongly and weakly coupled physical-biogeochemical data assimilation, the ability to assimilate observations of any diagnostic calculated within biogeochemical models, and the ability to estimate biogeochemical parameters, EAT is well suited to explore and advance the state-of-the-art in marine data assimilation (DA). Its range of capabilities is demonstrated with four applications that demonstrate core functionality and EAT’s ability to mimic the configuration of operational data assimilation systems.