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Late Quaternary Water Mass Variability Derived From The Pteropod Preservation State In Sediments Of The Western South Atlantic Ocean And The Caribbean Sea
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Book Synopsis Late Quaternary Water Mass Variability Derived from the Pteropod Preservation State in Sediments of the Western South Atlantic Ocean and the Caribbean Sea by : Sabine Gerhardt
Download or read book Late Quaternary Water Mass Variability Derived from the Pteropod Preservation State in Sediments of the Western South Atlantic Ocean and the Caribbean Sea written by Sabine Gerhardt and published by . This book was released on 2001 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spring Meeting by : American Geophysical Union. Meeting
Download or read book Spring Meeting written by American Geophysical Union. Meeting and published by . This book was released on 1993 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary Pteropod Preservation in Eastern North Atlantic Sediments in Relation to Changing Climate by : G. M. Ganssen
Download or read book Late Quaternary Pteropod Preservation in Eastern North Atlantic Sediments in Relation to Changing Climate written by G. M. Ganssen and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary Changes in Nitrogen Fixation and Climate Variability Recorded by Sediments from the Gulf of Mexico and the Caribbean Sea by : Anna Nele Meckler
Download or read book Late Quaternary Changes in Nitrogen Fixation and Climate Variability Recorded by Sediments from the Gulf of Mexico and the Caribbean Sea written by Anna Nele Meckler and published by . This book was released on 2006 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 1994 Ocean Sciences Meeting written by and published by . This book was released on 1994 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary Paleochemistry of the Southern Ocean by : Yair Rosenthal
Download or read book Late Quaternary Paleochemistry of the Southern Ocean written by Yair Rosenthal and published by . This book was released on 1994 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Glacial World According to Wally by : Wallace S. Broecker
Download or read book The Glacial World According to Wally written by Wallace S. Broecker and published by . This book was released on 1995 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Western South Atlantic Holocene and Glacial Deepwater Hydrography Derived from Benthic Foraminiferal Cd/Ca and Stable Carbon Isotope Data by : Michael Joshua Horowitz
Download or read book Western South Atlantic Holocene and Glacial Deepwater Hydrography Derived from Benthic Foraminiferal Cd/Ca and Stable Carbon Isotope Data written by Michael Joshua Horowitz and published by . This book was released on 1999 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, deep waters produced in the North Atlantic are exported through the western South Atlantic. Antarctic intermediate water (AAIW) also enters the Atlantic in this region. Circumpolar deep water (CDW) fills the depths below AAIW and above and below northern source waters. A depth transect of cores from 1567-3909 m water depth in the western South Atlantic are ideally located to monitor inter-ocean exchange of deep water, and variations in the relative strength of northern versus southern source water production. Last glacial maximum (LGM) Cd/Ca and 813C data indicate a nutrient-depleted intermediate-depth water mass. In the mid-depth western South Atlantic, a simple conversion of LGM 813C data suggests significantly less nutrient enrichment than LGM Cd/Ca ratios, but Cd/Ca and 613C data can be reconciled when plotted in CdW/ 13C space. Paired LGM Cd/Ca and S13C data from mid-depth cores suggest increasingly nutrient rich waters below 2000 m, but do not require an increase in Southern Ocean water contribution relative to today. Cd/Ca data suggest no glacial-interglacial change in the hydrography of the deepest waters of the region. To maintain relatively low Cd/Ca ratios (low nutrients) in the deepest western South Atlantic waters, and in CDW in general, during the LGM requires an increased supply of nutrient-depleted glacial North Atlantic intermediate water (GNAIW) and/or nutrient-depleted glacial Subantarctic surface waters to CDW to balance reduced NADW contribution to CDW. LGM Cd/Ca and 513C data suggest strong GNAIW influence in the western South Atlantic which in turn implies export of GNAIW from the Atlantic, and entrainment of GNAIW into the Antarctic Circumpolar current.
Book Synopsis Planktic Foraminifers in the Modern Ocean by : Ralf Schiebel
Download or read book Planktic Foraminifers in the Modern Ocean written by Ralf Schiebel and published by Springer. This book was released on 2017-02-24 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the taxonomy, biology, sedimentation, and carbonate geochemistry of modern species. Students, early career and advanced scientists alike will profit from a broad synthesis of the current understanding of planktic foraminifers as an ecological indicator, biogeochemical factories, and proxies in paleoceanography. The classification of modern species is amply illustrated with electron and light microscope images of morphotypes, addresses the state-of-the-art of molecular genetics of species, and provides a detailed guide for any laboratory analyses. The biology of planktic foraminifers is extensively discussed in chapters dedicated to the cellular ultrastructure, nutrition, symbionts, reproduction, ontogeny, and test architecture. Building on the biological prerequisites, the distribution of planktic foraminifers is discussed at regional to global scale. The geochemistry and sedimentation of tests are considered in relation to the ecology of the living animal. In the final chapter, which examines the most common methods in planktic foraminifer research, hands-on information is provided on sampling, processing and analyzing samples in the laboratory, as well as selected established methods for data interpretation. The various topics discussed in this book are aimed at the application of planktic foraminifers as sensitive indicators of the changing climate and marine environment.
Book Synopsis Deep and Bottom Water Exchange in the Transition Zone Between South Atlantic, Indian Ocean and Southern Ocean in the Late Quaternary by : Stefan Krüger
Download or read book Deep and Bottom Water Exchange in the Transition Zone Between South Atlantic, Indian Ocean and Southern Ocean in the Late Quaternary written by Stefan Krüger and published by . This book was released on 2008 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climate Change and Marine Geological Dynamics by : George Kontakiotis
Download or read book Climate Change and Marine Geological Dynamics written by George Kontakiotis and published by Mdpi AG. This book was released on 2021-11-11 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tendency for climate to change has been one of the most surprising outcomes of the study of Earth's history. Marine geoscience can reveal valuable information about past environments, climates, and biota just before, during and after each climate perturbation. Particularly, certain intervals of geological records are windows to key episodes in the climate history of the Earth-life system. Ιn this regard, the detailed analyses of such time intervals are challenging and rewarding for environmental reconstruction and climate modelling, because they provide documentation and better understanding of a warmer-than-present world, and opportunities to test and refine the predictive ability of climate models. Marine geological dynamics such as sea-level changes, hydrographic parameters, water quality, sedimentary cyclicity, and (paleo)climate are strongly related through a direct exchange between the oceanographic and atmospheric systems. The increasing attention paid to this wide topic is also motivated by the interplay of these processes across a variety of settings (coastal to open marine) and timescales (early Cenozoic to modern). In order to realize the full predictive value of these warm (fresh)/cold (salty) intervals in Earth's history, it is important to have reliable tools (e.g., integrated geochemical, paleontological and/or paleoceanographic proxies) through the application of multiple, independent, and novel techniques (e.g., TEX86, UK'37, Mg/Ca, Na/Ca, Δ47, and μCT) for providing reliable hydroclimate reconstructions at both local and global scales.
Book Synopsis Late Quaternary Water-level Fluctuations in the Northeastern United States by : Robert Stabler Webb
Download or read book Late Quaternary Water-level Fluctuations in the Northeastern United States written by Robert Stabler Webb and published by . This book was released on 1990 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Multiproxy Paleoenvironmental Reconstruction of Late Quaternary Marine Sediments by : Bailey G. Donovan
Download or read book A Multiproxy Paleoenvironmental Reconstruction of Late Quaternary Marine Sediments written by Bailey G. Donovan and published by . This book was released on 2017 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two gravity cores were collected from 43 km and 90 km offshore of Kuala Terengganu (western Sunda Shelf, southern South China Sea) at ~60 m water depth to characterize late Quaternary paleoenvironments by using bulk sediment magnetic susceptibility (BMS), elemental analysis via X-ray fluorescence spectrometry (XRF), and foraminiferal analyses. Radiocarbon age estimates (using benthic foraminiferal carbonate material) indicated the nearshore core was Holocene (ca. 10,000-6,000 cal years BP) in age while the offshore core was deposited prior to the last glacial maximum (ca. 45,000 cal years BP and possibly older) during marine isotope stage (MIS) 3 (ca. 60,000 - 30,000 yrs BP) within the late Pleistocene. Elemental and BMS data agree well within both cores, except Pleistocene sediments exhibit higher BMS (ca. 1x10-4 si) and higher calcium content (ca. 2%) than Holocene sediments. These data can be interpreted as representing stronger terrestrial influence during the deposition of Pleistocene sediments or a higher dissolution of calcium carbonate. BMS data, elemental data, and micropaleontological evidence, relative abundances of 64 benthic foraminiferal species, indicate that both cores were deposited in an inner shelf environment similar to the modern shelf environment at ca. 50-60 m water depth. However, a higher ratio of planktonic foraminifera (Holocene: 0-1.3%, Pleistocene: 0-8.5%) suggests a greater influence of open marine waters in the Pleistocene sediments. The position of sea level during deposition of the late Pleistocene cored sediments is higher (ca. 60-0 m depending on the data set) than eustatic published sea-level data for MIS 3. This incongruity could be caused by age inaccuracies from limitations of the radiocarbon dating technique, although this seems unlikely as the lower range of age estimates fall within the technique and the uppermost range falls on the border of the limitations of the technique. Other options for the incongruity include large margins of error for late Pleistocene sea-level reconstruction and vertical crustal movement post-deposition from isostatic adjustment or tectonic activity.
Book Synopsis Journal of Sedimentary Petrology by :
Download or read book Journal of Sedimentary Petrology written by and published by . This book was released on 1991 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Quaternary Sea-level Highstands and Deep-ocean Circulation Variability During the Mid-pliocene : Implications for Future Climate Change by : Robert K. Poirier
Download or read book Late Quaternary Sea-level Highstands and Deep-ocean Circulation Variability During the Mid-pliocene : Implications for Future Climate Change written by Robert K. Poirier and published by . This book was released on 2017 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Upwelling Systems of the World by : Jochen Kämpf
Download or read book Upwelling Systems of the World written by Jochen Kämpf and published by Springer. This book was released on 2016-08-29 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upwelling systems are special places in the oceans where nutrient-enriched water is brought into the euphotic zone to fuel phytoplankton blooms that, via marine food-web interactions, create the world’s richest fish resources. This book introduces the reader to the interdisciplinary science of upwelling and provides a comprehensive overview of the world’s most productive marine ecosystems in the context of climate variability, climate change and human exploitation. This material presented is suitable for undergraduate and postgraduate study or just for anyone interested to learn about the creation of life in the oceans and how this is compromised by human activities.
Download or read book Petroleum Abstracts written by and published by . This book was released on 1991 with total page 1512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
