| 41. | Sharply defined boundaries exist between water masses which form at the surface, and subsequently maintain their own identity within the ocean.
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| 42. | Apart from the atmospheric regions that cover the oceans, and discrete climates above the land and water masses of the planet.
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| 43. | The Black Sea, a huge inland water mass which touches six countries, is the world's largest marine " dead zone ."
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| 44. | Just as river valleys direct streams and rivers on the continents, the bottom topography steers the deep and bottom water masses.
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| 45. | The neritic zone encompasses the water mass directly above the continental shelves whereas the oceanic zone includes all the completely open water.
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| 46. | "This means that the CO2-enriched water masses in the abyss Atlantic will remain isolated from the atmosphere for centuries, " they wrote.
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| 47. | Due to sinking grabens in the Atlantic domain, the water masses of the Atlantic and the Tethys mixed for the first time.
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| 48. | The water masses cut valleys into the rock with their streambeds and contributed in places to the formation of the rock faces.
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| 49. | The deep water masses ( > 1600 m ) are recirculated within the Greenland Sea due to the Jan Mayen Fracture Zone.
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| 50. | The current carries is relatively cold and fresh water out of the Arctic that corresponds to a water mass called Polar water.
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