Now showing items 433-452 of 786

  • The marine geochemistry of the rare earth elements 

    Baar, Hein J. W. de (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1983-09)
    Novel methods were developed for the determination of 12 of the 14 Rare Earth Elements (REE) in seawater. Initial extractions of the REE by chelating ion exchange chromatography is followed by cation exchange for removal ...
  • The marine geochemistry of thorium and protactinium 

    Anderson, Robert F. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-11)
    Suspended particulate matter was collected by sediment traps deployed in the Sargasso Sea (Site S2), the north equatorial Atlantic (Site E), the north equatorial Pacific (Site P), and the Panama Basin (STIE Site). Additional ...
  • The marine geochemistry of trace metals 

    Boyle, Edward A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1976-04)
    The marine geochemical cycles of iron, copper, nickel, and cadmium were studied in order to provide a basis for oceanographic models for trace metals. Copper, nickel, and cadmium can be determined in a 100 ml seawater ...
  • The marine inorganic carbon system along the Gulf of Mexico and Atlantic coasts of the United States : insights from a transregional coastal carbon study 

    Wang, Zhaohui Aleck; Wanninkhof, Rik; Cai, Wei-Jun; Byrne, Robert H.; Hu, Xinping; Peng, Tsung-Hung; Huang, Wei-Jen (Association for the Sciences of Limnology and Oceanography, 2013-01)
    Distributions of total alkalinity (TA), dissolved inorganic carbon (DIC), and other parameters relevant to the marine inorganic carbon system were investigated in shelf and adjacent ocean waters during a U.S. Gulf of Mexico ...
  • Marine microbial intact polar diacylglycerolipids and their application in the study of nutrient stress and bacterial production 

    Popendorf, Kimberly J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-02)
    Intact polar diacylglycerolipids (IP-DAGs) were used to study microbial dynamics in the surface ocean. IP-DAGs from surface ocean seawater were quantified using high performance liquid chromatography-mass spectrometry ...
  • Marine microbial production of dimethylsulfide from dissolved dimethylsulfoniopropionate 

    Ledyard, Kathleen Mei (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-02)
    Dimethylsulfide (DMS) plays a central role in the transfer of sulfur from the ocean to the atmosphere, and ultimately to land. The most abundant volatile organosulfur compound in seawater, DMS is believed to account for ...
  • Marine particle dynamics : sinking velocities, size distributions, fluxes, and microbial degradation rates 

    McDonnell, Andrew M. P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
    The sinking flux of particulate matter into the ocean interior is an oceanographic phenomenon that fuels much of the metabolic demand of the subsurface ocean and affects the distribution of carbon and other elements ...
  • Marine sedimentary organic matter : delineation of marine and terrestrial sources through radiocarbon dating; and the role of organic sulfur in early petroleum generation 

    Benitez-Nelson, Bryan C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-05)
    This thesis details two years of research conducted with the guidance and support of three advisors: Dr. J. K. Whelan, Dr. J. S. Seewald and Dr. T. I. Eglinton. Each of the three chapters represents a different, ...
  • Marine-derived C-14 calibration and activity record for the past 50,000 years updated from the Cariaco Basin 

    Hughen, Konrad A.; Southon, John R.; Lehman, S.; Bertrand, Chanda J. H.; Turnbull, J. (2006-03-01)
    An expanded Cariaco Basin 14C chronology is tied to 230Th-dated Hulu Cave speleothem records in order to provide detailed marine-based 14C calibration for the past 50,000 years. The revised, high resolution Cariaco 14C ...
  • Marine04 marine radiocarbon age calibration, 0-26 cal kyr BP 

    Hughen, Konrad A.; Baillie, Mike G. L.; Bard, Edouard; Beck, J. Warren; Bertrand, Chanda J. H.; Blackwell, Paul G.; Buck, Caitlin E.; Burr, George S.; Cutler, Kirsten B.; Damon, Paul E.; Edwards, R. Lawrence; Fairbanks, Richard G.; Friedrich, Michael; Guilderson, Thomas P.; Kromer, Bernd; McCormac, Gerry; Manning, Sturt; Ramsey, C. Bronk; Reimer, Paula J.; Reimer, Ron W.; Remmele, Sabine; Southon, John R.; Stuiver, Minze; Talamo, Sahra; Taylor, F. W.; van der Plicht, Johannes; Weyhenmeyer, Constanze E. (Dept. of Geosciences, University of Arizona, 2004)
    New radiocarbon calibration curves, IntCal04 and Marine04, have been constructed and internationally ratified to replace the terrestrial and marine components of IntCal98. The new calibration data sets extend an additional ...
  • Mariprofundus ferrooxydans PV-1 the First Genome of a Marine Fe(II) Oxidizing Zetaproteobacterium 

    Singer, Esther; Emerson, David; Webb, Eric A.; Barco, Roman A.; Kuenen, J. Gijs; Nelson, William C.; Chan, Clara S.; Comolli, Luis R.; Ferriera, Steve; Johnson, Justin; Heidelberg, John F.; Edwards, Katrina J. (Public Library of Science, 2011-09-23)
    Mariprofundus ferrooxydans PV-1 has provided the first genome of the recently discovered Zetaproteobacteria subdivision. Genome analysis reveals a complete TCA cycle, the ability to fix CO2, carbon-storage proteins and a ...
  • Measuring xCO₂ using the CAT/NDIR method system set up, calibration, maintenance and shutdown 

    Tracy, Maren E.; Peltzer, Edward T.; Goyet, Catherine (Woods Hole Oceanographic Institution, 1994-02)
    Accurate measurement of partial pressure of CO2 in seawater is currently performed by measuring pC02 in an aliquot of a small volume of gas equilibrated with a large volume of the seawater to be measured. PC02 in the gas ...
  • Mechanisms controlling dissolved iron distribution in the North Pacific : a model study 

    Misumi, Kazuhiro; Tsumune, Daisuke; Yoshida, Yoshikatsu; Uchimoto, K.; Nakamura, T.; Nishioka, Jun; Mitsudera, Humio; Bryan, Frank O.; Lindsay, Keith; Moore, J. Keith; Doney, Scott C. (American Geophysical Union, 2011-07-22)
    Mechanisms controlling the dissolved iron distribution in the North Pacific are investigated using the Biogeochemical Elemental Cycling (BEC) model with a resolution of approximately 1° in latitude and longitude and 60 ...
  • Mechanisms governing interannual variability of upper-ocean temperature in a global ocean hindcast simulation 

    Doney, Scott C.; Yeager, Stephen G.; Danabasoglu, Gokhan; Large, William G.; McWilliams, James C. (American Meteorological Society, 2007-07)
    The interannual variability in upper-ocean (0–400 m) temperature and governing mechanisms for the period 1968–97 are quantified from a global ocean hindcast simulation driven by atmospheric reanalysis and satellite data ...
  • Mechanisms of metal release from contaminated coastal sediments 

    Kalnejais, Linda H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-09)
    The fate of trace metals in contaminated coastal sediments is poorly understood, yet critical for effective coastal management. The aim of this thesis is to investigate and quantify the mechanisms leading to the release ...
  • Meeting report : Ocean ‘omics science, technology and cyberinfrastructure : current challenges and future requirements (August 20-23, 2013) 

    Gilbert, Jack A.; Dick, Gregory J.; Jenkins, Bethany D.; Heidelberg, John F.; Allen, Eric E.; Mackey, Katherine R. M.; DeLong, Edward F. (Genomic Standards Consortium, 2014)
    The National Science Foundation’s EarthCube End User Workshop was held at USC’s Wrigley Marine Science Center on Catalina Island, California in August 2013. The workshop was designed to explore and characterise the needs ...
  • Mercury and monomethylmercury in fluids from Sea Cliff submarine hydrothermal field, Gorda Ridge 

    Lamborg, Carl H.; Von Damm, Karen L.; Fitzgerald, William F.; Hammerschmidt, Chad R.; Zierenberg, Robert (American Geophysical Union, 2006-09-09)
    Submarine hydrothermal systems are hypothesized to be a potentially important source of monomethylmercury (MMHg) to the ocean, yet the amount of MMHg in vent fluids is unknown. Here, we report total Hg and MMHg concentrations ...
  • Mercury flux to sediments of Lake Tahoe, California-Nevada 

    Drevnick, Paul E.; Shinneman, Avery L. C.; Lamborg, Carl H.; Engstrom, Daniel R.; Bothner, Michael H.; Oris, James T. (2009-08-12)
    We report estimates of mercury (Hg) flux to the sediments of Lake Tahoe, California-Nevada: 2 and 15-20 µg/m2/yr in preindustrial and modern sediments, respectively. These values result in a modern to preindustrial flux ...
  • Mercury in the anthropocene ocean 

    Lamborg, Carl H.; Bowman, Katlin; Hammerschmidt, Chad R.; Gilmour, Cindy; Munson, Kathleen M.; Selin, Noelle; Tseng, Chun-Mao (The Oceanography Society, 2014-03)
    The toxic metal mercury is present only at trace levels in the ocean, but it accumulates in fish at concentrations high enough to pose a threat to human and environmental health. Human activity has dramatically altered the ...
  • Mercury species concentrations and fluxes in the Central Tropical Pacific Ocean 

    Munson, Kathleen M.; Lamborg, Carl H.; Swarr, Gretchen J.; Saito, Mak A. (John Wiley & Sons, 2015-03-25)
    The formation of the toxic and bioaccumulating monomethylmercury (MMHg) in marine systems is poorly understood, due in part to sparse data from many ocean regions. We present dissolved mercury (Hg) speciation data from 10 ...