The candidate will study ocean, ice, and coupled data assimilation strategies within the NASA GEOS coupled forecast system. This researcher will help to design novel techniques to assimilate new NASA observations such as laser altimetry from ICESAT-2, high-resolution altimetry from the Surface Water/Ocean Topography (SWOT), and ocean currents from e.g., the Ocean Dynamics and Surface Exchange with the Atmosphere (ODYSEA) satellite.