Now showing items 46-65 of 769

  • Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization : results for the North Pacific 

    Dehairs, Frank; Jacquet, S.; Savoye, Nicolas; Van Mooy, Benjamin A. S.; Buesseler, Ken O.; Bishop, James K. B.; Lamborg, Carl H.; Elskens, Marc; Baeyens, W.; Boyd, Philip W.; Casciotti, Karen L.; Monnin, C. (2008-01-22)
    This study focuses on the fate of exported organic carbon in the twilight zone at two contrasting environments in the North Pacific: the oligotrophic ALOHA site (22°45' N 158°W; Hawaii; studied during June–July 2004) and ...
  • Basin-scale inputs of cobalt, iron, and manganese from the Benguela-Angola front to the South Atlantic Ocean 

    Noble, Abigail E.; Lamborg, Carl H.; Ohnemus, Daniel C.; Lam, Phoebe J.; Goepfert, Tyler J.; Measures, Christopher I.; Frame, Caitlin H.; Casciotti, Karen L.; DiTullio, Giacomo R.; Jennings, Joe C.; Saito, Mak A. (Association for the Sciences of Limnology and Oceanography, 2012-07)
    We present full-depth zonal sections of total dissolved cobalt, iron, manganese, and labile cobalt from the South Atlantic Ocean. A basin-scale plume from the African coast appeared to be a major source of dissolved metals ...
  • Behavior of lobsters (Homarus americanus) in a semi-natural environment at ambient temperatures and under thermal stress 

    Stein, Lauren; Jacobson, Stewart; Atema, Jelle (Woods Hole Oceanographic Institution, 1975-10)
    In January, 1974 we established semi-natural habitats in two 10ft. diameter, octagonal aquaria, with five lobsters (Homarus americanus) each, and several Cancer irroratus, Anguilla rostrata, Pseudopleuronectes americanus and ...
  • A Benthic chamber with electric stirrer mixing 

    Dickinson, Wayne; Sayles, Fred L. (Woods Hole Oceanographic Institution, 1992-02)
    Benthic chambers incorporating electric stirrer mixing have been designed and tested and have proven reliable during seven 18-31 day, 4300m ocean deployments. The chambers are 21 cm diameter by 31 cm long acrylic tubes ...
  • Beryllium-7 analyses in seawater by low background gamma-spectroscopy 

    Andrews, J. E.; Hartin, C.; Buesseler, Ken O. (2006-10-11)
    7Be is a cosmogenic isotope produced in the stratosphere and troposphere. 7Be has a half-life of 53.4 days and decays to 7Li emitting a 477 keV gamma line with a branching ratio of 0.104. It is predominantly washed out of ...
  • Bioaccumulation and trophic transfer of methylmercury in Long Island Sound 

    Hammerschmidt, Chad R.; Fitzgerald, William F. (2006-02-22)
    Humans are exposed to methylmercury (MeHg) principally by consumption of marine fish. The coastal zone supports the majority of marine fish production, and may therefore be an important source of MeHg to humans; however, ...
  • Biogeochemical applications of compound-specific radiocarbon analysis 

    Pearson, Ann (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-10)
    Compound-specific carbon isotopic (δ13C and Δ14C) data are reported for lipid biomarkers isolated from Santa Monica Basin (SMB) and Santa Barbara Basin (SBB) surface sediments. These organic compounds represent ...
  • Biogeochemical iron budgets of the Southern Ocean south of Australia : decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply 

    Bowie, Andrew R.; Lannuzel, Delphine; Remenyi, Tomas A.; Wagener, Thibaut; Lam, Phoebe J.; Boyd, Philip W.; Guieu, Cecile; Townsend, Ashley T.; Trull, Thomas W. (American Geophysical Union, 2009-12-31)
    Climate change is projected to significantly alter the delivery (stratification, boundary currents, aridification of landmasses, glacial melt) of iron to the Southern Ocean. We report the most comprehensive suite of ...
  • Biogeochemical relationships between ultrafiltered dissolved organic matter and picoplankton activity in the Eastern Mediterranean Sea 

    Meador, Travis B.; Gogou, Alexandra; Spyres, Georgina; Herndl, Gerhard J.; Krasakopoulou, Evangelia; Psarra, Stella; Yokokawa, Taichi; De Corte, Daniele; Zervakis, Vassilis; Repeta, Daniel J. (2009-12-10)
    We targeted the warm, subsurface waters of the Eastern Mediterranean Sea (EMS) to investigate processes that are linked to the chemical composition and cycling of dissolved organic carbon (DOC) in seawater. The apparent ...
  • Biogeochemical responses to late-winter storms in the Sargasso Sea, III—Estimates of export production using 234Th:238U disequilibria and sediment traps 

    Maiti, Kanchan; Benitez-Nelson, Claudia R.; Lomas, Michael W.; Krause, Jeffrey W. (2009-01)
    Direct measurements of new production and carbon export in the subtropical North Atlantic Ocean appear to be too low when compared to geochemical based estimates. It has been hypothesized that episodic inputs of new ...
  • The biogeochemistry of 210Pb and 210Po in fresh waters and sediments 

    Benoit, Gaboury (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1988-01)
    The focus of this work was geochemical cycling of 210Pb in lakes, including the water column, sediments, and their interactions with each other. A special goal was to elucidate processes that might influence the distribution ...
  • The biogeochemistry of carbon across a gradient of streams and rivers within the Congo Basin 

    Mann, Paul J.; Spencer, Robert G. M.; Dinga, B. J.; Poulsen, John R.; Hernes, P. J.; Fiske, Gregory J.; Salter, M. E.; Wang, Zhaohui Aleck; Hoering, Katherine A.; Six, J.; Holmes, Robert M. (John Wiley & Sons, 2014-04-30)
    Dissolved organic carbon (DOC) and inorganic carbon (DIC, pCO2), lignin biomarkers, and theoptical properties of dissolved organic matter (DOM) were measured in a gradient of streams and rivers within the Congo Basin, with ...
  • The biogeochemistry of cobalt in the Sargasso Sea 

    Saito, Mak A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2001-02)
    Processes that enable marine phytoplankton to acquire trace metals are fundamental to our understanding of primary productivity and global carbon cycling. This thesis explored the biogeochemistry of cobalt using analytical ...
  • Biogeochemistry of dissolved free amino acids in marine sediments 

    Henrichs, Susan M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-08)
    Dissolved free amino acids (DFAA) were measured in interstitial water samples squeezed from sediments collected in a variety of depositional environments. These sediments were further characterized by measurements of ...
  • The biogeochemistry of marine nitrous oxide 

    Frame, Caitlin H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
    Atmospheric nitrous oxide N2O concentrations have been rising steadily for the past century as a result of human activities. In particular, human perturbation of the nitrogen cycle has increased the N2O production rates ...
  • The biogeochemistry of marine particulate trace metals 

    Ohnemus, Daniel C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-02)
    Marine particles include living and non-living solid components of seawater, representing a dynamic and chemically diverse mixture of phases. Through a combination of method development, basin-scale particulate collection ...
  • Biological consumption of carbon monoxide in Delaware Bay, NW Atlantic and Beaufort Sea 

    Xie, Huixiang; Zafiriou, Oliver C.; Umile, Thomas P.; Kieber, David J. (Inter-Research, 2005-04-13)
    Microbial consumption is the dominant sink of oceanic carbon monoxide (CO), one of the major carbon-containing photoproducts of chromophoric dissolved organic matter in marine waters. This study presents first-order microbial ...
  • Blank assessment for ultra-small radiocarbon samples : chemical extraction and separation versus AMS 

    Santos, Guaciara M.; Southon, John R.; Drenzek, Nicholas J.; Ziolkowski, Lori A.; Druffel, Ellen R. M.; Xu, Xiaomei; Zhang, Dachun; Trumbore, Susan E.; Eglinton, Timothy I.; Hughen, Konrad A. (Dept. of Geosciences, University of Arizona, 2010-08)
    The Keck Carbon Cycle AMS facility at the University of California, Irvine (KCCAMS/UCI) has developed protocols for analyzing radiocarbon in samples as small as ~0.001 mg of carbon (C). Mass-balance background corrections for ...
  • A bottom-up view of the biological pump : modeling source funnels above ocean sediment traps 

    Siegel, David A.; Fields, E.; Buesseler, Ken O. (2007-10-21)
    The sinking of particles that make up the biological pump is not vertical, but nearly horizontal. This means that the locations where the particles are formed may be distant from their collection in a sediment trap. This ...
  • Building a window to the sea : Ocean Research Interactive Observatory Networks (ORION) 

    Schofield, Oscar M. E.; Tivey, Margaret K. (Oceanography Society, 2004-06)
    For centuries, oceanographers have relied on data and observations about the ocean and the seafloor below gathered from ships during cruises of limited duration. This expeditionary research approach has resulted in ...