the project, run from the nasa jet propulsion lab, is known as omg for oceans melt in greenland. rising surface temperatures and warming ocean waters undermining the glaciers. >> they melt rapidly with contact from ocean waters and if the ocean waters get warmer, that interaction is enhanced and helps accelerate the flow of the glaciers. spencer: for the team, the flow was visible in every direction. streams of melting ice rushing like rivers through a canyon. at one point, temperatures had warmed so much that rain replaced snow at greenland summit for the first time on record. >> the pilot remarked, i have been flying over this ice sheet for 25 years and i have never seen so much melting, so widespread. spencer: he says the omg mission is designed to generate data that can be compared year to year for a clear look at the growing threat. the study is data driven. the latest images of the ice melts provide a vivid picture of what is becoming clear. one of the major concerns being studied is the effect of melting glaciers on sea level rise. effects expected to be seen globally, inc