GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Radium isotopes  (3)
  • Oceanography-Encyclopedias.  (2)
  • 1
    Online-Ressource
    Online-Ressource
    San Diego :Elsevier Science & Technology,
    Schlagwort(e): Oceanography-Encyclopedias. ; Marine ecology-Encyclopedias. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (4330 pages)
    Ausgabe: 3rd ed.
    ISBN: 9780128130827
    DDC: 551.4603
    Sprache: Englisch
    Anmerkung: 9780128130827_WEB01 -- Front Cover -- Encyclopedia of Ocean Sciences -- Copyright -- Permission Acknowledgement -- Upper Ocean Processes -- Penetrating Shortwave Radiation -- References -- Shelf Sea and Shelf Slope Fronts -- Further Reading -- Relevant Websites -- Submesoscale Processes -- References -- Surface Films -- References -- Upper Ocean Heat and Freshwater Budgets -- References -- Further Reading -- Relevant Web Pages -- Upper Ocean Mean Horizontal Structure -- Further Reading -- Upper Ocean Mixing -- Further Reading -- Upper Ocean Structure: Ekman Transport and Pumping -- Further Reading -- Upper Ocean Structure: Responses to Strong Atmospheric Forcing Events -- References -- Further Reading -- Upper Ocean Vertical Structure -- Further Reading -- Wave-Driven Upper Ocean Processes -- References -- Further Reading -- Wind- and Buoyancy-Forced Upper Ocean -- References -- Further Reading -- Elemental Distribution -- Elemental Distribution: Overview -- References -- Relevant Websites -- Anthropogenic Trace Elements in the Ocean -- Further Reading -- Artificial Radionuclides -- References -- Further Reading -- Conservative Elements -- References -- Further Reading -- Metalloids and Oxyanions -- Further Reading -- Oxygen -- References -- Further Reading -- Platinum Group Elements and Their Isotopes in the Ocean -- References -- Rare Earth Elements and Their Isotopes in the Ocean -- References -- Further Reading -- Refractory Metals -- Further Reading -- Trace Metal Nutrients -- Further Reading -- Transition Metals and Heavy Metal Speciation -- References -- Further Reading -- Ocean Process Tracers -- CFCs and SF6 as Tracers of Ocean Processes -- References -- Compound-Specific Radiocarbon Measurements -- Further Reading -- Radiocarbon-Based Insights into the Biogeochemical Cycles of Marine Dissolved and Particulate Organic Carbon. , References -- Cosmogenic Isotopes -- Further Reading -- Nitrogen Isotopes in the Ocean -- Further Reading -- Noble Gases and the Cryosphere -- References -- Further Reading -- Nuclear Fuel Reprocessing and Related Discharges -- Further Reading -- Modeling of Ocean Carbon System -- Further Reading -- Relevant Websites -- Open Ocean Distribution and Applications of Natural and Bomb-Produced Delta14C -- Conclusions -- Reference -- Further Reading -- Oxygen Isotopes in the Ocean -- References -- Further Reading -- Redox-Sensitive Metals -- Further Reading -- The Stable Carbon Isotopic Composition of the Oceans -- References -- Further Reading -- Tracer Release Experiments -- Further Reading -- Tracers of Ocean Productivity -- Further Reading -- Tritium-Helium Dating -- Further Reading -- Uranium-Thorium Decay Series in the Oceans: Overview -- References -- Further Reading -- Uranium-Thorium Radionuclides in Ocean Profiles -- Further Reading -- Volcanic Helium -- References -- Further Reading -- Nutrient Cycling -- Carbon Dioxide (CO2) Cycle -- References -- Further Reading -- Nitrogen Cycle -- References -- Ocean Carbon Cycle -- References -- Ocean Iron Fertilization -- References -- Further Reading -- Phosphorus Cycle -- Further Reading -- Redfield Ratio -- References -- The Global Marine Silica Budget: Sources and Sinks -- References -- Further Reading -- Primary Production -- Approaches to Measuring Marine Primary Production -- Further Reading -- Aquatic Flow Cytometry -- References -- Relevant Websites -- Bacterioplankton -- Further Reading -- Bioluminescence -- Further Reading -- Cephalopods -- Further Reading -- Continuous Plankton Recorders -- Further Reading -- Copepods -- References -- Further Reading -- Relevant Websites -- Dynamics of Bacteria and Phytoplankton in the Surface Ocean -- References -- Further Reading -- Krill -- Further Reading. , Marine Algal Genomics and Evolution -- Further Reading -- Marine Cyanobacteria: Prochlorococcus and Synechococcus -- Further Reading -- Marine Plankton Communities -- Further Reading -- Nekton -- Further Reading -- Pelagic Biogeography -- References -- Further Reading -- Phytoplankton Size Structure -- Further Reading -- Phytoplankton, Calcareous Nanoplankton-The Coccolithophores -- Further Reading -- Plankton -- Further Reading -- Plankton Viruses -- Further Reading -- Plankton: Gelatinous Zooplankton -- Further Reading -- Primary Production Distribution -- References -- Further Reading -- Primary Production Processes -- Further Reading -- Protozoa, Planktic Foraminifera -- References -- Protozoa, Radiolarians -- Further Reading -- Small-Scale Physical Processes and Plankton Biology -- Further Reading -- Ecosystems and Ecosystem Structure and Dynamics (food webs) -- ArtificialReefs -- Further Readings -- Coastal Ocean Acidification: Carbonate Chemistry and Ecosystem Effects -- References -- Cold-Water Coral Reefs -- References -- Further Reading -- Relevant Website -- Corals and Human Disturbance -- Further Reading -- Diversity of Marine Species -- Further Reading -- Food Webs -- Further Reading -- Relevant Websites -- Large Marine Ecosystems -- References -- Mesocosms: Enclosed Experimental Ecosystems in Ocean Science -- Further Reading -- Microbial Loops -- Further Reading -- Network Analysis of Food Webs -- Further Reading -- Ocean Gyre Ecosystems -- Further Reading -- Omics Techniques in Marine Microbiology -- Further Reading -- Patch Dynamics -- Further Reading -- Polar Ecosystems -- Further Reading -- Population Genetics of Marine Organisms -- Further Reading -- Upwelling Ecosystems -- Further Reading -- Back Cover -- Front Cover -- Encyclopedia of Ocean Sciences -- Copyright -- Permission Acknowledgement -- Birds -- Alcidae -- Further Reading. , Gulls -- Further Reading -- Laridae, Sternidae, and Rynchopidae -- References -- Further Reading -- Phalaropes -- Further Reading -- Procellariiformes -- Further Reading -- Seabird Conservation -- Further Reading -- Seabird Foraging Ecology -- Further Reading -- Seabird Migration -- Further Reading -- Seabird Population Dynamics -- Further Reading -- Seabird Reproductive Ecology -- Further Reading -- Seabird Responses to Climate Change -- References -- Further Reading -- Seabirds and Fisheries Interactions -- Further Reading -- Seabirds as Indicators of Ocean Pollution -- Further Reading -- Sphenisciformes -- Further Reading -- The Pelecaniform Birds -- References -- Further Reading -- Fish Biology -- Fish: General Review -- Further Reading -- Antarctic Fishes -- Further Reading -- Coral Reef Fishes -- Further Reading -- Deep-Sea Fishes -- Further Reading -- Eels -- References -- Fish Ecophysiology -- Further Reading -- Fish Feeding and Foraging -- Further Reading -- Relevant Website -- Fish Larvae -- References -- Further Reading -- Relevant Websites -- Fish Locomotion -- References -- Relevant Website -- Fish Migration, Horizontal -- References -- Further Reading -- Fish Migration, Vertical -- Further Reading -- Fish Predation and Mortality -- Further Reading -- Fish Reproduction -- Further Reading -- Fish Vision -- Further Reading -- Fish: Demersal Fish (Life Histories, Behavior, Adaptations) -- Further Reading -- Fish: Hearing, Lateral Lines (Mechanisms, Role in Behavior, Adaptations to Life Underwater) -- References -- Intertidal Fishes -- Further Reading -- Mesopelagic Fish -- References -- Further Reading -- Pelagic Fishes -- References -- Further Reading -- Salmonids -- Further Reading -- Fisheries and Mariculture -- Fisheries Overview -- References -- Further Reading -- Challenges for Future Salmonid Farming -- Further Reading. , Coral Reef and Other Tropical Fisheries -- Further Reading -- Crustacean Fisheries -- References -- Further Reading -- Dynamics of Exploited Marine Fish Populations -- References -- Further Reading -- Ecosystem Effects of Fishing -- Further Reading -- Fisheries Economics -- References -- Further Reading -- Relevant Websites -- Fisheries: Pacific Salmon Fisheries -- References -- Further Reading -- Relevant Websites -- Fisheries: Multispecies Dynamics -- Further Reading -- Fishery Management, Human Dimension -- Further Reading -- Fishery Manipulation Through Stock Enhancement or Restoration -- References -- Further Reading -- Relevant Websites -- Fishing Methods and Fishing Fleets -- Further Reading -- Luxury Seafood Trade: Extinction vs. Lavishness -- Further Reading -- Mariculture Overview -- Further Reading -- Relevant Websites -- Mariculture, Economic, and Social Impacts -- Further Reading -- Relevant Websites -- Marine Fishery Resources, Global State of -- Further Reading -- Mediterranean Mariculture -- References -- Further Reading -- Relevant Website -- Molluskan Fisheries -- Further Reading -- Relevant Websites -- Ocean Ranching -- Further Reading -- Open Ocean Fisheries for Deep-Water Species -- References -- Further Reading -- Open Ocean Fisheries for Large Pelagic Species -- References -- Further Reading -- Oysters: Shellfish Farming -- References -- Further Reading -- Relevant Websites -- Seaweeds and their Mariculture -- Further Reading -- Relevant Website -- Small Pelagic Species Fisheries -- Future Research -- References -- Further Reading -- Southern Ocean Fisheries -- Further Reading -- Marine Mammals -- Baleen Whales -- References -- Further Reading -- Bioacoustics -- References -- Further Reading -- Dolphins and Porpoises -- Further Reading -- Marine Mammal Diving Physiology -- Further Reading -- Marine Mammal Evolution and Taxonomy. , Further Reading.
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Online-Ressource
    Online-Ressource
    London : Academic Press, imprint of Elsevier
    Schlagwort(e): Oceanography-Encyclopedias. ; Marine ecology-Encyclopedias
    Beschreibung / Inhaltsverzeichnis: The oceans cover 70% of the Earth’s surface, and are critical components of Earth’s climate system. This new edition of Encyclopedia of Ocean Sciences summarizes the breadth of knowledge about them, providing revised, up to date entries as well coverage of new topics in the field. New and expanded sections include microbial ecology, high latitude systems and the cryosphere, climate and climate change, hydrothermal and cold seep systems. The structure of the work provides a modern presentation of the field, reflecting the input and different perspective of chemical, physical and biological oceanography, the specialized area of expertise of each of the three Editors-in-Chief. In this framework maximum attention has been devoted to making this an organic and unified reference.
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource (6 Volumes) , Diagramme
    Ausgabe: Third edition
    ISBN: 9780128130827
    Sprache: Englisch
    Anmerkung: Volume 1 : Marine Biogeochemistry , Volume 2 : Marine Life , Volume 3 : Ocean dynamics , Volume 4 : Seafloor processes , Volume 5 : Technology, instrumentation , Volume 6 : Ocean interfaces & human impacts
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Publikationsdatum: 2022-05-25
    Beschreibung: Author Posting. © Elsevier B.V., 2008. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Environmental Radioactivity 99 (2008): 1596-1610, doi:10.1016/j.jenvrad.2008.06.010.
    Beschreibung: Results of groundwater and seawater analyses for radioactive (3H, 222Rn, 223Ra, 224Ra, 226Ra, 228Ra) and stable (2H, 18O) isotopes are presented together with in situ spatial mapping and time-series 222Rn measurements in seawater, direct seepage measurements using manual and automated seepage meters, pore water investigations using different tracers and piezometric techniques, and geoelectric surveys probing the coast. This study represents first time that such a new complex arsenal of radioactive and non-radioactive tracer techniques and geophysical methods have been used for simultaneous submarine groundwater discharge (SGD) investigations. Large fluctuations of SGD fluxes were observed at sites situated only a few meters apart (from 0 cm d-1 to 360 cm d-1; the unit represents cm3/cm2/day), as well as during a few hours (from 0 cm d-1 to 110 cm d-1), strongly depending on the tidal fluctuations. The average SGD flux estimated from continuous 222Rn measurements is 17±10 cm d-1. Integrated coastal SGD flux estimated for the Ubatuba coast using radium isotopes is about 7x103 m3 d-1 per km of the coast. The isotopic composition (δ2H and δ18O) of submarine waters was characterised by significant variability and heavy isotope enrichment, indicating that the contribution of groundwater in submarine waters varied from a small percentage to 20%. However, this contribution with increasing offshore distance became negligible. Automated seepage meters and time-series measurements of 222Rn activity concentration showed a negative correlation between the SGD rates and tidal stage. This is likely caused by sea level changes as tidal effects induce variations of hydraulic gradients. The geoelectric probing and piezometric measurements contributed to better understanding of the spatial distribution of different water masses present along the coast. The radium isotope data showed scattered distributions with offshore distance, which imply that seawater in a complex coast with many small bays and islands was influenced by local currents and groundwater/seawater mixing. This has also been confirmed by a relatively short residence time of 1-2 weeks for water within 25 km offshore, as obtained by short-lived radium isotopes. The irregular distribution of SGD seen at Ubatuba is a characteristic of fractured rock aquifers, fed by coastal groundwater and recirculated seawater with small admixtures of groundwater, which is of potential environmental concern and has implications on the management of freshwater resources in the region.
    Beschreibung: This research was supported by IAEA and UNESCO (IOC and IHP) in the framework of the joint SGD project. Science support for some U.S. investigators was provided by grants from the National Science Foundation (OCE03-50514 to WCB and OCE02-33657 to WSM).
    Schlagwort(e): Submarine groundwater discharge ; Groundwater ; Seawater ; Stable isotopes ; δD ; δ18O ; Tritium ; Radium isotopes ; Radon ; Coastal zone ; Ubatuba ; Brazil
    Repository-Name: Woods Hole Open Access Server
    Materialart: Preprint
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Publikationsdatum: 2022-05-25
    Beschreibung: Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Journal of Environmental Radioactivity 104 (2012): 24-45, doi:10.1016/j.jenvrad.2011.09.009.
    Beschreibung: Submarine groundwater discharge (SGD) into a shallow lagoon on the west coast of Mauritius Island (Flic-en-Flac) was investigated using radioactive (3H, 222Rn, 223Ra, 224Ra, 226Ra, 228Ra) and stable (2H, 18O) isotopes and nutrients. SGD intercomparison exercises were carried out to validate the various approaches used to measure SGD including radium and radon measurements, seepage-rate measurements using manual and automated meters, sediment bulk conductivity and salinity surveys. SGD measurements using benthic chambers placed on the floor of the Flic-en-Flac Lagoon showed discharge rates up to 500 cm/day. Large variability in SGD was observed over distances of a few meters, which were attributed to different geomorphological features. Deployments of automated seepage meters captured the spatial and temporal variability of SGD with a mean seepage rate of 10 cm/day. The stable isotopic composition of submarine waters was characterized by significant variability and heavy isotope enrichment and was used to predict the contribution of fresh terrestrially derived groundwater to SGD (range from a few % to almost 100 %). The integrated SGD flux, estimated from seepage meters placed parallel to the shoreline, was 35 m3/m day, which was in a reasonable agreement with results obtained from hydrologic water balance calculation (26 m3/m day). SGD calculated from the radon inventory method using in situ radon measurements were between 5 and 56 m3/m per day. Low concentrations of radium isotopes observed in the lagoon water reflected the low abundance of U and Th in the basalt that makes up the island. High SGD rates contribute to high nutrients loading to the lagoon, potentially leading to eutrophication. Each of the applied methods yielded unique information about the character and magnitude of SGD. The results of the intercomparison studies have resulted a better understanding of groundwater-seawater interactions in coastal regions. Such information is an important pre-requisite for the protection management of coastal freshwater resources.
    Beschreibung: The financial support provided by the IOC and IHP of UNESCO for travel arrangements, and by the IAEA’s Marine Environment Laboratories for logistics is highly acknowledged. MAC and MEG were supported in part by the US National Science Foundation (OCE-0425061 and OCE-0751525). PPP acknowledges a support provided by the EU Research & Development Operational Program funded by the ERDF (project No. 26240220004), and the Slovak Scientific Agency VEGA (grant No. 1/108/08). The International Atomic Energy Agency is grateful to the Government of the Principality of Monaco for support provided to its Marine Environment Laboratories.
    Schlagwort(e): Submarine groundwater discharge ; Groundwater ; Seawater ; Seepage meters ; Stable isotopes ; δD ; δ18O ; Tritium ; Radium isotopes ; Radon ; Nutrients ; Coastal zone ; Volcanic island ; Mauritius Island
    Repository-Name: Woods Hole Open Access Server
    Materialart: Preprint
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Publikationsdatum: 2022-10-26
    Beschreibung: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Tamborski, J., Cochran, J. K., Bokuniewicz, H., Heilbrun, C., Garcia-Orellana, J., Rodellas, V., & Wilson, R. Radium mass balance sensitivity analysis for submarine groundwater discharge estimation in semi-enclosed basins: the case study of Long Island Sound. Frontiers in Environmental Science, 8, (2020): 108, doi:10.3389/fenvs.2020.00108.
    Beschreibung: Estimation of submarine groundwater discharge (SGD) to semi-enclosed basins by Ra isotope mass balance is herein assessed. We evaluate 224Ra, 226Ra, and 228Ra distributions in surface and bottom waters of Long Island Sound (CT-NY, United States) collected during spring 2009 and summer 2010. Surface water and bottom water Ra activities display an apparent seasonality, with greater activities during the summer. Long-lived Ra isotope mass balances are highly sensitive to boundary fluxes (water flux and Ra activity). Variation (50%) in the 224Ra, 226Ra, and 228Ra offshore seawater activity results in a 63–74% change in the basin-wide 226Ra SGD flux and a 58–60% change in the 228Ra SGD flux, but only a 4–9% change in the 224Ra SGD flux. This highlights the need to accurately constrain long-lived Ra activities in the inflowing and outflowing water, as well as water fluxes across boundaries. Short-lived Ra isotope mass balances are sensitive to internal Ra fluxes, including desorption from resuspended particles and inputs from sediment diffusion and bioturbation. A 50% increase in the sediment diffusive flux of 224Ra, 226Ra, and 228Ra results in a ∼30% decrease in the 224Ra SGD flux, but only a ∼6–10% decrease in the 226Ra and 228Ra SGD flux. When boundary mixing is uncertain, 224Ra is the preferred tracer of SGD if sediment contributions are adequately constrained. When boundary mixing is well-constrained, 226Ra and 228Ra are the preferred tracers of SGD, as sediment contributions become less important. A three-dimensional numerical model is used to constrain boundary mixing in Long Island Sound (LIS), with mean SGD fluxes of 1.2 ± 0.9 × 1013 L y–1 during spring 2009 and 3.3 ± 0.7 × 1013 L y–1 during summer 2010. The SGD flux to LIS during summer 2010 was one order of magnitude greater than the freshwater inflow from the Connecticut River. The maximum marine SGD-driven N flux is 14 ± 11 × 108 mol N y–1 and rivals the N load of the Connecticut River.
    Beschreibung: This project has been funded by New York Sea Grant projects (R/CCP-16 and R/CMC-12). This research is contributing to the ICTA-UAB Unit of Excellence “María de Maeztu” (MDM-2015-0552) and MERS (2017 SGR – 1588, Generalitat de Catalunya). VR acknowledges financial support from the Beatriu de Pinós postdoctoral program of the Catalan Government (2017-BP-00334).
    Schlagwort(e): Radium isotopes ; Submarine groundwater discharge ; Porewater exchange ; Nitrogen ; Long Island Sound
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...