The Oceans Melting Greenland (OMG) mission seeks to understand how ocean water is contributing to ice loss in Greenland.

In October 2017, mission scientists and crew dropped 240 ocean probes from a C-130 aircraft into the waters around Greenland to measure ocean temperature. Footage includes interior and exterior shots of the aircraft with crew and scientists at work, and shots from a chase plane showing the probes dropping. https://omg.jpl.nasa.gov/portal