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Definitions (1838)
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saplingA loose term for a young tree more than a few feet tall and an inch or so in diameter that is typically growing vigorously.
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isobathLine connecting points of equal water debth on a chart; a seabed contour.
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tectonic forcesForces generated from within the earth that result in uplift, movement, or deformation of part of the earths crust.
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oyashioA current setting southwestward along the Siberian, Kamchatka, and Kuril Islands coasts in the Bering Sea and North Pacific Ocean.
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ekman spiralA logarithmic spiral (when projected on a horizontal plane) formed by current velocity vectors at increasing depth intervals. The current vectors become progressively smaller with depth. They spiral to the right (looking in the direction of flow) in the Northern Hemisphere and to the left in the Southern with increasing depth. Theoretically, the surface current vector sets 45 from the direction toward which the wind is blowing. Flow opposite to the surface current occurs at the so-called "depth of frictional resistance". The phenomenon occurs in wind drift currents in which only the Coriolis and frictional forces are significant. Named for Vagn Walfrid Ekman who, assuming a constant eddy viscosity, steady wind stress, and unlimited depth and extent, published on the effect in 1905.
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