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Polar easterlies

The abyssal clays are composed primarily of clay-sized clay minerals, quartz, and feldspar transported to the siuface ocean by aeolian transport. Since the winds that pick up these terrigenous particles travel in latitudinal bands (i.e., the Trades, Westerlies, and Polar Easterlies), the clays can be transported out over the ocean. When the winds weaken, the particles fell to the sea siufece and eventually settle to the seafloor. Since the particles are small, they can take thousands of years to reach the seafloor. A minor fraction of the abyssal clays are of riverine origin, carried seaward by geostrophic currents. Despite slow sedimentation rates (millimeters per thousand years), clay minerals, feldspar, and quartz are the dominant particles composing the surface sediments of the abyssal plains that lie below the CCD. Since a sediment must contain at least 70% by mass lithogenous particles to be classified as an abyssal clay, lithogenous particles can still be the major particle type in a biogenous ooze. [Pg.519]

The four major biogeochemical zones, thus defined, are the polar, easterly, and trade domains. A fourth zone is defined to encompass the coastal regions. The major functional characteristics of these domains are presented in Table 24.5. [Pg.681]

TNS shows a weak fluorescence when dissolved in a polar solvent. Its fluorescence intensity increase significantly when it binds to proteins (McClure and Edelman, 1966) or to membranes (Easter et al. 1976). [Pg.265]

Near to the poles are the polar easterlies, separated from the westerlies by the subpolar low-pressure troughs. [Pg.876]

Air circulates within the troposphere from the equator toward the two poles. In simple terms, the hot air at the equator rises and moves toward the poles when it encounters cold temperatures at the poles, it becomes more dense and sinks, then circulates back toward the equator. In fact, this occurs in a series of convection cells that run from the equator to each pole as shown in Figure 2.3 (adapted from [58]). The Hadley cells are locateid at the equator. Air circulates in the Hadley cells toward each of the poles, to a latitude of approximately 30° N/S. North and south of the Hadley cells lie the Ferrel cells. Air circulates between approximately 30° and 60° in the Ferrel cells. Near the surface of the earth, the air flows toward the pole and eastward high in the troposphere the air circulates back toward the equator and toward the west. Beyond the Ferrel cells are the Polar cells. Air circulates within these cells between approximately 60° N and the North Pole, blowing in an easterly direction, or between 60° S and the South Pole [59]. [Pg.20]


See other pages where Polar easterlies is mentioned: [Pg.68]    [Pg.520]    [Pg.717]    [Pg.158]    [Pg.163]    [Pg.36]    [Pg.311]    [Pg.323]    [Pg.75]    [Pg.292]    [Pg.56]    [Pg.588]    [Pg.985]    [Pg.985]    [Pg.995]    [Pg.1000]    [Pg.11]    [Pg.103]    [Pg.72]    [Pg.339]    [Pg.349]   
See also in sourсe #XX -- [ Pg.311 ]




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