Filters: Tags: Sediment chemistry (X) > Extensions: Project (X)

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ShoreZone Program on the North Slope of Alaska The Bureau of Ocean Energy Management (BOEM) is supporting a field effort in support of a ShoreZone mapping project along the Chukchi and Beaufort coasts. Funds from the LCC will allow for the inclusion of three additional ShoreStations. Researchers will conduct ground surveys to get detailed physical and biological measurements throughout the various and often unique Chukchi and Beaufort coastal habitats. Sediment samples will be archived from each shore station for hydrocarbon analyses in the event of a local or regional oil spill. The Arctic ShoreZone Shore Stations will be added to the statewide database and made available online to the public NOAA website. Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BARRIER ISLANDS, BARRIER ISLANDS, BEACHES, BEACHES, COASTAL LANDFORMS, All tags... COASTAL LANDFORMS, Conservation Planning, DELTAS, DELTAS, Data Acquisition and Development, Federal resource managers, Interested public, LCC Network Science Catalog, Project, SEDIMENT CHEMISTRY, SEDIMENT CHEMISTRY, SEDIMENT COMPOSITION, SEDIMENT COMPOSITION, SEDIMENTARY TEXTURES, SEDIMENTARY TEXTURES, SHORELINES, SHORELINES, State agencies, completed, environment, environment, Fewer tags Geochemical Reactions Between Water and Mineral Substrates Water quality and pollution contamination depend strongly on geochemical processes involving reactions with mineral surfaces and substrates. Such processes include weathering reactions that contribute dissolved chemicals, sorption that removes aqueous species, and electron transfer mechanisms that establish redox conditions. Although extensive research has been conducted on the aqueous chemistry, minimal information exists on the corresponding solid phases and their effects on chemical transport. Objectives of this project are to: investigate the composition and structure of common mineral surfaces and determine the extent of heterogeneity between specific surfaces and the bulk mineral phase; determine the mechanism... Categories: Project; Tags: Chemical Transport, Mineralogy, Sediment Chemistry, Weathering Sedimentary Geochemical Processes Affecting the Exchange of Nutrients and Transition Metals Between Sediment and Water in Riverine, Estuarine, and Lacustrine Environments Benthic sediment exchange processes are potentially a very significant source/ sink of nutrients and metals within an aquatic system. Too often the quantitative effects of these processes are only estimated when considering biogeochemical cycling and ecological responses. Understanding geochemical processes that control nutrient and transition metal chemistry of natural waters is requisite for predicting the effects man-induced events will have upon natural geochemical cycles and for determining their utilization as a natural resource (e.g. estuarine waters as food resources). Objectives of this project are to (1) study the important geochemical processes affecting the nutrient and metal composition of and exchange... Categories: Project; Tags: Estuaries and Near-Shore Environments, Metals, Nutrients, Sediment Chemistry Biogeochemistry of Metals and Nutrients in Sediments There are two major questions being addressed at study sites of this research project. (1) To what degree is the phosphorus in sediment at a study site bioavailable? (2) Will the phosphorus in the sediment be retained or released to the water column over time? The objectives of my research are (1) to determine the geochemical associations of nutrients (in particular phosphorus) and metals in sedimentary environments (2) determine what these associations mean with respect to bioavailability or release of nutrients or metals to the water column. Bottom sediment is a major control over the concentrations of nutrients and metals in the water column because sediment can retain nutrients and metals or release nutrients... Categories: Project; Tags: Metals, Nutrients, Sediment Chemistry