Now showing items 262-281 of 786

  • Extending the record of photosynthetic activity in the eastern United States into the presatellite period using surface diurnal temperature range 

    Bonfils, Celine; Angert, Alon; Henning, Cara C.; Biraud, Sebastien; Doney, Scott C.; Fung, Inez Y. (American Geophysical Union, 2005-04-26)
    In this study, we demonstrate that mid-latitude surface measurements of diurnal temperature range (DTR) can be used to reconstruct decadal variability of regional-scale terrestrial photosynthetic activity 1) during and ...
  • Factors challenging our ability to detect long-term trends in ocean chlorophyll 

    Beaulieu, C.; Henson, Stephanie A.; Sarmiento, Jorge L.; Dunne, John P.; Doney, Scott C.; Rykaczewski, R. R.; Bopp, Laurent (Copernicus Publications on behalf of the European Geosciences Union, 2013-04-23)
    Global climate change is expected to affect the ocean's biological productivity. The most comprehensive information available about the global distribution of contemporary ocean primary productivity is derived from satellite ...
  • Fallout nuclides in Atlantic and Pacific water columns : GEOSECS data 

    Livingston, Hugh D.; Bowen, Vaughan T.; Casso, Susan A.; Volchok, H. L.; Noshkin, V. E.; Wong, K. M.; Beasley, T. M. (Woods Hole Oceanographic Institution, 1985-05)
    This report contains results of measurements of the fallout radionuclides 90Sr, 137Cs , 239,240Pu , and 241Am in large volume seawater samples collected between 1972 and 1974 in the Atlantic and Pacific as part of ...
  • Fate of dispersants associated with the Deepwater Horizon oil spill 

    Kujawinski, Elizabeth B.; Kido Soule, Melissa C.; Valentine, David L.; Boysen, Angela K.; Longnecker, Krista; Redmond, Molly C. (2011-01-05)
    Response actions to the Deepwater Horizon oil spill included the injection of ~771,000 gallons (2,900,000 L) of chemical dispersant into the flow of oil near the seafloor. Prior to this incident, no deepwater applications ...
  • Fishing for answers 

    Buesseler, Ken O. (2012-08-30)
    The triple disaster of the March 11, 2011, earthquake, tsunami, and subsequent radiation releases at Fukushima Dai-ichi were, and continue to be, unprecedented events for the ocean and for society. More than 80% of the ...
  • The five stable noble gases are sensitive unambiguous tracers of glacial meltwater 

    Loose, Brice; Jenkins, William J. (John Wiley & Sons, 2014-04-16)
    The five inert noble gases—He, Ne, Ar, Kr, and Xe—exhibit a unique dissolved gas saturation pattern resulting from the formation and addition of glacial meltwater to seawater. He and Ne become oversaturated, and Ar, Kr, ...
  • Floating oil-covered debris from Deepwater Horizon : identification and application 

    Carmichael, Catherine A.; Arey, J. Samuel; Graham, William M.; Linn, Laura J.; Lemkau, Karin L.; Nelson, Robert K.; Reddy, Christopher M. (IOP Publishing, 2012-01-18)
    The discovery of oiled and non-oiled honeycomb material in the Gulf of Mexico surface waters and along coastal beaches shortly after the explosion of Deepwater Horizon sparked debate about its origin and the oil covering ...
  • Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, USA) : field data and reactive transport modeling 

    Spiteri, Claudette; Slomp, Caroline P.; Charette, Matthew A.; Tuncay, Kagan; Meile, Christof (2008-04-25)
    A two-dimensional (2D) reactive transport model is used to investigate the controls on nutrient (NO3-, NH4+, PO4) dynamics in a coastal aquifer. The model couples density dependent flow to a reaction network which includes ...
  • Fluctuations in export productivity over the last century from sediments of a southern Chilean fjord (44°S) 

    Sepulveda, Julio; Pantoja, Silvio; Hughen, Konrad A.; Lange, Carina B.; Gonzalez, Fidelina; Munoz, Praxedes; Rebolledo, Lorena; Castro, Rodrigo; Contreras, Sergio; Avila, Alejandro; Rossel, Pamela; Lorca, Gisella; Salamanca, Marco; Silva, Nelson (2005-07-08)
    Here we present the first reconstruction of changes in surface primary production during the last century from the Puyuhuapi fjord in southern Chile, using a variety of parameters (diatoms, biogenic silica, total organic ...
  • Fluid inclusion evidence for subsurface phase separation and variable fluid mixing regimes beneath the deep-sea PACMANUS hydrothermal field, Manus Basin back arc rift, Papua New Guinea 

    Vanko, David A.; Bach, Wolfgang; Roberts, Stephen; Yeats, Christopher J.; Scott, Steven D. (American Geophysical Union, 2004-03-05)
    Altered volcanic rocks were cored from over 350 m below the seafloor at the Papua New Guinea-Australia-Canada Manus Basin Hydrothermal Field (PACMANUS) deep-sea hydrothermal field, in the eastern Manus back arc basin. Fluid ...
  • Flux and size fractionation of He-3 in interplanetary dust from Antarctic ice core samples 

    Brook, Edward J.; Kurz, Mark D.; Curtice, Joshua (2009-07-12)
    Accretion of extraterrestrial material to earth is of interest for a variety of reasons, including as a possible driver of long or short-term climate change, and as a record of solar system events preserved in the ...
  • Forcing of tropical Atlantic sea surface temperatures during the mid-Pleistocene transition 

    Schefuß, Enno; Sinninghe Damste, Jaap S.; Jansen, J. H. Fred (American Geophysical Union, 2004-12-28)
    We compare a new mid-Pleistocene sea surface temperature (SST) record from the eastern tropical Atlantic to changes in continental ice volume, orbital insolation, Atlantic deepwater ventilation, and Southern Ocean front ...
  • A fossil winonaite-like meteorite in Ordovician limestone : a piece of the impactor that broke up the L-chondrite parent body? 

    Schmitz, Birger; Huss, Gary R.; Meier, Matthias M. M.; Peucker-Ehrenbrink, Bernhard; Church, Ross P.; Cronholm, Anders; Davies, Melvyn B.; Heck, Philipp R.; Johansen, Anders; Keil, Klaus; Kristiansson, Per; Ravizza, Gregory E.; Tassinari, Mario; Terfelt, Fredrik (Elsevier, 2014-06-06)
    About a quarter of all meteorites falling on Earth today originate from the breakup of the L-chondrite parent body ∼470 Ma∼470 Ma ago, the largest documented breakup in the asteroid belt in the past ∼3 Ga∼3 Ga. A window ...
  • Fractional solubility of aerosol iron : synthesis of a global-scale data set 

    Sholkovitz, Edward R.; Sedwick, Peter N.; Church, Thomas M.; Baker, Alexander R.; Powell, Claire F. (2012-04-06)
    Aerosol deposition provides a major input of the essential micronutrient iron to the open ocean. A critical parameter with respect to biological availability is the proportion of aerosol iron that enters the oceanic ...
  • A framework for a marine biodiversity observing network within changing continental shelf seascapes 

    Muller-Karger, Frank E.; Kavanaugh, Maria T.; Montes, Enrique; Balch, William M.; Breitbart, Mya; Chavez, Francisco P.; Doney, Scott C.; Johns, Elizabeth M.; Letelier, Ricardo M.; Lomas, Michael W.; Sosik, Heidi M.; White, Angelicque E. (The Oceanography Society, 2014-06)
    Continental shelves and the waters overlying them support numerous industries as diverse as tourism and recreation, energy extraction, fisheries, transportation, and applications of marine bio-molecules (e.g., agribusiness, ...
  • From serpentinization to carbonation : new insights from a CO2 injection experiment 

    Klein, Frieder; McCollom, Thomas M. (2013-08)
    We injected a CO2-rich hydrous fluid of seawater chlorinity into an ongoing, mildly reducing (H2(aq) ≈ 3 mmol/kg) serpentinization experiment at 230°C and 35 MPa to examine the changes in fluid chemistry and mineralogy ...
  • Fukushima and ocean radioactivity 

    Buesseler, Ken O. (The Oceanography Society, 2014-03)
    The triple disaster of the March 11, 2011, earthquake, tsunami, and subsequent radiation releases from Japan's Fukushima Dai-ichi nuclear power plant were unprecedented events for the ocean and society. In this article, ...
  • Fukushima-derived radionuclides in the ocean and biota off Japan 

    Buesseler, Ken O.; Jayne, Steven R.; Fisher, Nicholas S.; Rypina, Irina I.; Baumann, Hannes; Baumann, Zofia; Breier, Crystaline F.; Douglass, Elizabeth M.; George, Jennifer; Macdonald, Alison M.; Miyamoto, Hiroomi; Nishikawa, Jun; Pike, Steven M.; Yoshida, Sachiko (National Academy of Sciences, 2012-04-02)
  • Genealogical analyses of multiple loci of litostomatean ciliates (Protista, Ciliophora, Litostomatea) 

    Vd’acny, Peter; Bourland, William A.; Orsi, William D.; Epstein, Slava S.; Foissner, Wilhelm (Elsevier, 2012-07-09)
    The class Litostomatea is a highly diverse ciliate taxon comprising hundreds of free-living and endocommensal species. However, their traditional morphology-based classification conflicts with 18S rRNA gene phylogenies ...
  • Generation of seafloor hydrothermal vent fluids and associated mineral deposits 

    Tivey, Margaret K. (Oceanography Society, 2007-03)
    In the nearly 30 years since the discovery of hydrothermal venting along open-ocean spreading centers, much has been learned about the generation of vent fluids and associated deposits. The hot, reducing, metal-rich, ...