. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 1G, ocean deep The roles of the sea in relation to human life are many. Planet Earth is Planet Ocean for the waters really dominate our sphere. To fathom-high man, the ocean seems enormously deep and an endless frontier. But, as the world grows smaller and its population larger, the role of the sea is changing. bz:z:ji::z:z: â¢â¢ U^S^^%:i^^^ZKSS^m^?.S-fiT^SffPt^ â sfcijj !-. ...> .y- â¢, .y. -⢠â AA^r. Dr. Robert S. Dietz, NOAA Atlantic Oce
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 1G, ocean deep The roles of the sea in relation to human life are many. Planet Earth is Planet Ocean for the waters really dominate our sphere. To fathom-high man, the ocean seems enormously deep and an endless frontier. But, as the world grows smaller and its population larger, the role of the sea is changing. bz:z:ji::z:z: â¢â¢ U^S^^%:i^^^ZKSS^m^?.S-fiT^SffPt^ â sfcijj !-. ...> .y- â¢, .y. -⢠â AA^r. Dr. Robert S. Dietz, NOAA Atlantic Oceano graphic and Meteorological Laboratories Life originated in the sea, and without the sea all life would cease. Because of the high specific heat of water, the oceans act as a great global thermostat and heat reservoir, leveling out the extremes of temperature that would prevail without its moderating influences. The sea's surface provides an avenue for the least-expensive mode of transport known. But it has also been a barrierâfor example, keep- ing Creat Britain free from foreign invasion since 1066 The shore provides a playground, and the open sea is the ultimate repository for all hu- man waste. Ocean fisheries are a major source of food. Less appreciated is that the sea is a major storehouse of minerals. Even today the value of oil recovered from the continental shelves around the United States exceeds the income of fisheries. While the undersea world is our nearest frontier, it is also the most distant. It lies at our feet but it remains unknownâvirtually un- explored and unused. Plate tectonics and continental drift In the past decade we have achieved a new model of the earth, based upon plate tectonics and its corollary of continental drift. This new paradigm of global tectonics has been as revo- lutionary to earth science as Darwin's theory of evolution was to biology a century ago. We now know that the earth's crust consists of a mosaic of about eig
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