1 00:00:00,010 --> 00:00:03,040 Silence 2 00:00:03,060 --> 00:00:06,060 Silence 3 00:00:06,080 --> 00:00:09,110 Music 4 00:00:09,130 --> 00:00:12,170 Earth is the water 5 00:00:12,190 --> 00:00:15,200 planet. Although forty percent of 6 00:00:15,220 --> 00:00:18,220 Earth's population lives within or near 7 00:00:18,240 --> 00:00:21,240 coastal regions, the ocean impacts 8 00:00:21,260 --> 00:00:24,260 people everywhere. 9 00:00:24,280 --> 00:00:27,290 Music 10 00:00:27,310 --> 00:00:30,310 Most of Earth's water is stored in the ocean - 11 00:00:30,330 --> 00:00:33,340 a driving force for weather 12 00:00:33,360 --> 00:00:36,370 and climate. 13 00:00:36,390 --> 00:00:39,400 Music 14 00:00:39,420 --> 00:00:42,440 Music 15 00:00:42,460 --> 00:00:45,890 The Earth's surface is warmed unevenly by the sun. 16 00:00:45,910 --> 00:00:48,980 Heat, a form of energy, helps 17 00:00:49,000 --> 00:00:52,010 drive ocean and atmospheric circulation. 18 00:00:52,030 --> 00:00:55,050 Music 19 00:00:55,070 --> 00:00:58,180 The ocean absorbs and stores more heat than the atmosphere. 20 00:00:58,200 --> 00:01:01,380 Both the atmosphere and ocean move heat; 21 00:01:01,400 --> 00:01:04,560 the atmosphere does this quickly, the ocean 22 00:01:04,580 --> 00:01:07,560 slowly. 23 00:01:07,580 --> 00:01:10,750 Music 24 00:01:10,770 --> 00:01:13,940 At the ocean's surface, winds drive currents. 25 00:01:13,960 --> 00:01:17,130 Music 26 00:01:17,150 --> 00:01:20,310 Music 27 00:01:20,330 --> 00:01:23,500 Multiple forces 28 00:01:23,520 --> 00:01:26,550 keep the global ocean conveyor belt or 29 00:01:26,570 --> 00:01:29,730 Thermohaline Circulation in perpetual motion. 30 00:01:29,750 --> 00:01:32,910 Below the surface, 31 00:01:32,930 --> 00:01:36,090 deeper currents are driven by differences in density. 32 00:01:36,110 --> 00:01:39,110 Music 33 00:01:39,130 --> 00:01:42,170 Music 34 00:01:42,190 --> 00:01:45,220 Music 35 00:01:45,240 --> 00:01:48,240 Music 36 00:01:48,260 --> 00:01:51,280 Mixing and upwelling in 37 00:01:51,300 --> 00:01:54,340 the ocean, transport nutrient rich waters 38 00:01:54,360 --> 00:01:57,400 to the ocean's surface. Nutrients 39 00:01:57,420 --> 00:02:00,450 sustain biological productivity in the ocean. 40 00:02:00,470 --> 00:02:03,500 Extreme variations in 41 00:02:03,520 --> 00:02:06,550 sea surface height and sea surface temperature 42 00:02:06,570 --> 00:02:09,620 affect ocean and atmospheric circulation. 43 00:02:09,640 --> 00:02:12,720 Music 44 00:02:12,740 --> 00:02:15,720 Music 45 00:02:15,740 --> 00:02:18,910 El Nino and La Nina 46 00:02:18,930 --> 00:02:21,960 occur when changing wind patterns displace 47 00:02:21,980 --> 00:02:25,050 warm and cool water in the equatorial Pacific. 48 00:02:25,070 --> 00:02:28,150 Both have global 49 00:02:28,170 --> 00:02:31,260 impacts. 50 00:02:31,280 --> 00:02:34,400 Music 51 00:02:34,420 --> 00:02:37,560 During either of these events the replacement of cold water 52 00:02:37,580 --> 00:02:40,740 by warm water leads to air temperature swings and 53 00:02:40,760 --> 00:02:43,740 changes in humidity. 54 00:02:43,760 --> 00:02:46,910 Music 55 00:02:46,930 --> 00:02:50,100 This alters weather patterns by steering storms 56 00:02:50,120 --> 00:02:53,290 and rainfall to new locations. 57 00:02:53,310 --> 00:02:56,460 Music 58 00:02:56,480 --> 00:02:59,640 Music 59 00:02:59,660 --> 00:03:02,830 Shifts in rainfall affect plant growth 60 00:03:02,850 --> 00:03:06,010 and areas impacted by drought. 61 00:03:06,030 --> 00:03:09,180 Music 62 00:03:09,200 --> 00:03:12,230 Music 63 00:03:12,250 --> 00:03:15,260 Music 64 00:03:15,280 --> 00:03:18,310 Music 65 00:03:18,330 --> 00:03:21,340 When heat is exchanged between the ocean's surface 66 00:03:21,360 --> 00:03:24,400 to the atmosphere, it influences climate. 67 00:03:24,420 --> 00:03:27,450 For example, heat and moisture 68 00:03:27,470 --> 00:03:30,580 carried by the Gulf Stream northward bring 69 00:03:30,600 --> 00:03:33,750 warmer temperatures and a moderate climate to Europe. 70 00:03:33,770 --> 00:03:36,890 An eddy is a circular 71 00:03:36,910 --> 00:03:40,070 moving body of water that spins off a main current. 72 00:03:40,090 --> 00:03:43,260 Eddies play a major role transporting 73 00:03:43,280 --> 00:03:46,370 heat and nutrients. 74 00:03:46,390 --> 00:03:49,550 Music 75 00:03:49,570 --> 00:03:52,700 Thunderstorms are a frequent occurrence 76 00:03:52,720 --> 00:03:55,880 in the tropics. Some of these may become 77 00:03:55,900 --> 00:03:59,070 organized into large rotating systems with strong 78 00:03:59,090 --> 00:04:02,240 winds, growing into tropical storms or hurricanes. 79 00:04:02,260 --> 00:04:05,430 Music 80 00:04:05,450 --> 00:04:08,450 Tropical ocean basins like the 81 00:04:08,470 --> 00:04:11,640 Caribbean and the Gulf of Mexico retain 82 00:04:11,660 --> 00:04:14,820 substantial heat making these regions favorable for 83 00:04:14,840 --> 00:04:18,000 rapid storm intensification. 84 00:04:18,020 --> 00:04:21,180 Music 85 00:04:21,200 --> 00:04:24,380 By extracting large amounts of heat 86 00:04:24,400 --> 00:04:27,420 from the ocean, storms can become 87 00:04:27,440 --> 00:04:30,480 massive and destructive hurricanes. 88 00:04:30,500 --> 00:04:33,540 Music 89 00:04:33,560 --> 00:04:36,590 Music 90 00:04:36,610 --> 00:04:39,690 Music 91 00:04:39,710 --> 00:04:42,800 Silence 92 00:04:42,820 --> 00:04:45,890 Silence 93 00:04:45,910 --> 00:04:49,020 Music 94 00:04:49,040 --> 00:04:52,210 Music 95 00:04:52,230 --> 00:04:55,260 Music 96 00:04:55,280 --> 00:04:58,400 A driving force 97 00:04:58,420 --> 00:05:01,540 for weather and climate, 98 00:05:01,560 --> 00:05:04,720 the ocean is essential to life on Earth. 99 00:05:04,740 --> 00:05:07,900 It is the primary storehouse of Earth's water. 100 00:05:07,920 --> 00:05:11,090 Music 101 00:05:11,110 --> 00:05:14,290 Music 102 00:05:14,310 --> 00:05:17,470 Without the ocean our planet would be 103 00:05:17,490 --> 00:05:20,480 uninhabitable. 104 00:05:20,500 --> 00:05:23,640 Music 105 00:05:23,660 --> 00:05:26,800 NASA satellites and their unique 106 00:05:26,820 --> 00:05:29,960 view from space are helping to unveil the 107 00:05:29,980 --> 00:05:33,130 vast and largely unexplored 108 00:05:33,150 --> 00:05:36,310 ocean. 109 00:05:36,330 --> 00:05:39,480 Music 110 00:05:39,500 --> 00:05:42,510 Music 111 00:05:42,530 --> 00:05:45,550 Music 112 00:05:45,570 --> 00:05:48,560 Music 113 00:05:48,580 --> 00:05:51,590 Beeping 114 00:05:51,610 --> 00:05:54,640 Beeping 115 00:05:54,660 --> 00:05:57,690 Beeping 116 00:05:57,710 --> 00:06:00,207 Beeping