1 00:00:00,020 --> 00:00:04,100 2 00:00:04,100 --> 00:00:08,230 Understanding how fast glaciers are moving 3 00:00:08,230 --> 00:00:12,400 gives clues to how the climate is changing. 4 00:00:12,400 --> 00:00:16,440 5 00:00:16,440 --> 00:00:20,620 Landsat-8’s advanced imaging system lets scientists 6 00:00:20,620 --> 00:00:24,680 compare small movements in the ice. 7 00:00:24,680 --> 00:00:28,710 8 00:00:28,710 --> 00:00:32,840 Software tracks bumps or grooves in the ice to see how the texture changes. 9 00:00:32,840 --> 00:00:36,860 10 00:00:36,860 --> 00:00:40,880 Comparing ice movement around the world helps scientists identify trends 11 00:00:40,880 --> 00:00:47,390 and predict how much ice might flow into the ocean. 12 00:00:47,390 --> 00:00:51,218