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Detailed Reference Information |
Verardo, D.J. and McIntyre, A. (1994). Production and destruction: Control of biogenous sedimentation in the tropical Atlantic 0-300,000 years B.P.. Paleoceanography 9: doi: 10.1029/93PA02901. issn: 0883-8305. |
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Late Pleistocene signals of calcium carbonate, organic carbon, and opaline silica concentration and accumulation are documented in a series of cores from a zonal/meridional/depth transect in the equatorial Atlantic Ocean to reconstruct the regional sedimentary history. Spectral analysis reveals that maxima and minima in biogenous sedimentation occur with glacial-interglacial cyclicity as a function of both (1) primary production at the sea surface modulated by orbitally forced variation in trade wind zonality and (2) destruction at the seafloor by variation in the chemical character of advected intermediate and deep water from high latitudes modulated by high-latitude ice volume. From these results a pattern emerges in which the relative proportion of signal variance from the productivity signal centered on the precessional (23 kyr) band decreases while that of the destruction signal centered on the obliquity (41 kyr) and eccentricity (100 kyr) periods increase below ~3600-m ocean depth. ¿ American Geophysical Union 1993 |
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Abstract |
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Keywords
Oceanography, General, Paleoceanography, Oceanography, Biological and Chemical, Geochemistry, Oceanography, General, Equatorial oceanography |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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