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Geochemical Processes: Water and Sediment Environments
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The approach of this book to geochemistry can be summarized in the question: What happens, and how fast does it happen, when waters, solids, and gases interact in the earth's surface environment? The environment of the earths surface is made of solids and fluids, and the interactions among them are responsible for much of what is taking place in the physical world around us as mentioned in this paper.Abstract:
The approach of this book to geochemistry can be summarized in the question: What happens, and how fast does it happen, when waters, solids, and gases interact in the earths surface environment? The environment of the earths surface is made of solids and fluids, and theinteractions among them are responsible for much of what is taking place in the physical world around us. The dissolved load of natural waters and the materials of which sediments are made are the products of reactions taking place practically everywhere on land, in the atmosphere, and in the hydrosphere. Thus the term water and sediment environments applies effectivelly to much of the surface environment of the earth, including the zone of up to a few kilometers above and below the land and ocean surface. Evolution present itself to us as a more or less complex variety of processes-geological, physical, chemical, and biological. To this end, the inclusive title Geochemical Processes was chosen for the book, to introduce a text that emphasizes processes and time-dependent phenomena.read more
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Journal ArticleDOI
Sedimentation of lithogenic particles in the deep ocean
TL;DR: In this paper, a study of sediment traps collected by sediment traps in open-ocean stations revealed that the sediment flux increased linearly with depth in the water column; this rate of increase decreased with distance of the station from the continent; it was largest at the Panama Basin station and almost negligible at the E. Hawaii Abyssal Plain station.
Book ChapterDOI
C, N, P, S Global Biogeochemical Cycles and Modeling of Global Change
TL;DR: In the last two decades, the global biogeochemical cycles of elements have been investigated in considerable detail as discussed by the authors and much effort has been invested in the carbon cycle, nutrient cycles of nitrogen and phosphorus, and in the sulfur cycle.
Journal ArticleDOI
Transport and thermodynamics constrain belowground carbon turnover in a northern peatland
Julia Beer,Christian Blodau +1 more
TL;DR: In this article, the authors determined detailed concentration depth profiles of decomposition end-products, i.e., methane (CH4) and dissolved inorganic carbon (DIC), along with concentrations of relevant decomposition intermediates at an ombrotrophic Canadian peat bog.
Journal ArticleDOI
Determining Sediment Accumulation and Mixing Rates Using 210Pb, 137Cs, and Other Tracers: Problems Due to Postdepositional Mobility or Coring Artifacts
TL;DR: Sediment profiles of 137Cs in 12 lakes and of radionuclides added experimentally to four lakes at the Experimental Lakes Area, northwestern Ontario, were inconsistent with sediment chronologies derived from 210Pb distributions.
Journal ArticleDOI
Sediment-water exchange of Mn, Fe, Ni and Zn in Galveston Bay, Texas
TL;DR: In-situ benthic flux studies were conducted at three stations in Upper Galveston Bay twice during March 1996 to directly measure release rates of dissolved Mn, Fe, Ni and Zn from the sediments.