Download or read book Eastern Equatorial Pacific Ocean Sedimentation written by Ajay Kumar Singh and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Age-model derived sediment mass accumulation rates (MARs) are consistently higher than 230Th-normalized MARs in the Equatorial Pacific Ocean during the past 25 ka. The offset, being highest in the Panama Basin, suggests sediment redistribution in this region is prominent. I test the hypothesis that downslope transport of sediments from topographically highs that surround the Panama Basin is the cause of higher-than-expected xs230Th inventories in the deeper parts of the basin. There is little difference in xs230Th inventories between the highest and lowest reaches of the basin suggesting that the topographic highs did not serve as a source of xs230Th. A spatial analysis suggests that there may be an enhanced scavenging of xs230Th closest to the equator in productive waters. To examine whether lateral mixing of productive equatorial waters with adjacent waters delivers xs230Th to the Panama Basin, I measured dissolved 230Th in eight deep-water casts within the Guatemala, Panama, and Peru Basins along a meridional transect at ~86°W. Below 1000 m, the Panama Basin shows the highest deficit (~50%) of 230Th in deep waters assuming a reversible exchange of 230Th between dissolved and sinking particulate matter. Peru Basin waters have a larger range of dissolved 230Th concentrations (7.9-16.5 fg/kg) than that within Panama Basin waters (5.7-7.1 fg/kg). There is a progressive decrease, suggesting advection, in average dissolved deep-water (>1000 m) 230Th concentrations from the southernmost sites in the Peru Basin toward the Panama Basin. My calculations suggest that advected 230Th is between 15-30% of the total 230Th being produced within waters of the Panama Basin itself. In the Panama Basin, the averaged biogenic barium and opal MARs suggest that productivity was greater during the Holocene (0-13000 years) than that during the last glacial (13000-25000 years) suggesting higher productivity during the Holocene. Uauth, however, is higher in sediments deposited during the last glacial than in those deposited during the Holocene, suggesting that low bottom water oxygen contents rather than respiration of organic matter drives Uauth enrichment. This oxygen depletion during the last glacial suggests that bottom waters were enriched in respired carbon, which, in turn, could be a driver of lower glacial atmosphere pCO2 values. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148258

Download or read book Recent and Late Pleistocene Sediments from the Eastern Equatorial Pacific Ocean written by Charles Gordon Adelseck and published by . This book was released on 1977 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Equatorial Pacific Sediments written by Barbara Ann Price and published by . This book was released on 1988 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Geochemistry of Sediments of the Panama Basin Eastern Equatorial Pacific Ocean written by Thomas Frederick Pedersen and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Geochemistry of Sediments of the Panama Basin Eastern Equatorial Pacific Ocean written by Thomas Frederick Pedersen and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oceanography of the Tropical Pacific written by Unni Havem Rowell and published by . This book was released on 1979 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geotechnical Properties of Northeast Pacific Ocean Sediment and Their Relation to Geologic Processes written by Homa Jesse Lee and published by . This book was released on 1988 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Correlation of Cenozoic Deep Sea Sediments of the Equatorial Pacific Ocean written by Richard G. Blank and published by . This book was released on 1977 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deep Sea Sediments written by H. Huneke and published by Elsevier. This book was released on 2011-02-08 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Deep-Sea Sediments' focuses on the sedimentary processes operating within the various modern and ancient deep-sea environments. The chapters track the way of sedimentary particles from continental erosion or production in the marine realm, to transport into the deep sea, to final deposition on the sea floor.

Download or read book Spatial and temporal distribution of biogenic carbonate and opal in deep sea sediments from the eastern equatorial Pacific written by M.E. WEBER and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High resolution Sedimentology and Micropalaeontology of Laminated Diatomaceous Sediments from the Eastern Equatorial Pacific Ocean Leg 138 written by Richard B. Pearce and published by . This book was released on 1996 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological History of the Polar Oceans Arctic versus Antarctic written by U. Bleil and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 811 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, Bremen, Germany, October 10-14, 1988

Download or read book Dissolved Oxygen and Nutrient Distributions in Interstitial Waters of Abyssal Marine Sediments written by George Herman Setlock and published by . This book was released on 1979 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The sedimentary record of ENSO in the eastern equatorial Pacific Ocean and Peru continental margin written by and published by . This book was released on 2003 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book THE SEDIMENTARY RECORD OF ENSO IN THE EASTERN EQUATORIAL PACIFIC OCEAN AND PERU CONTINENTAL MARGIN written by Michael Watson and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cenozoic History and Paleoceanography of the Central Equatorial Pacific Ocean written by Tjeerd Hendrik Van Andel and published by Geological Society of America. This book was released on 1975 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reports of the Swedish Deep Sea Expedition 1947 1948 Sediment cores from the East Pacific written by Hans Pettersson and published by . This book was released on 1951 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: