Gravimetry has been used to track ocean currents, and water temperature will presumably effect currents. https://www.google.com/amp/s/www.washingtonpost.com/am

Gravimetry has been used to track ocean currents, and water temperature will presumably effect currents. https://www.google.com/amp/s/www.washingtonpost.com/amphtml/news/energy-environment/wp/2015/11/04/nasa-can-now-detect-worrying-ocean-circulation-changes-from-space/ https://www.google.com/amp/s/www.washingtonpost.com/amphtml/...