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Browsing Marine Chemistry and Geochemistry (MC&G) by Title

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Browsing Marine Chemistry and Geochemistry (MC&G) by Title

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  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Bertrand, Sebastien; Sterken, Mieke; Vargas-Ramirez, Lourdes; De Batist, Marc; Vyverman, Wim; Lepoint, Gilles; Fagel, Nathalie (2009-03-04)
    Since the last deglaciation, the mid-latitudes of the southern Hemisphere have undergone considerable environmental changes. In order to better understand the response of continental ecosystems to paleoclimate changes in ...
  • Hendry, Katharine R.; Rickaby, Rosalind E. M.; de Hoog, Jan C. M.; Weston, Keith; Rehkamper, Mark (2008-09)
    Cadmium is a biologically important trace metal that co-varies with phosphate (PO43- or Dissolved Inorganic Phosphate, DIP) in seawater. However, the exact nature of Cd uptake mechanisms and the relationship with phosphate ...
  • Xue, Zichen; Rehkamper, Mark; Horner, Tristan J.; Abouchami, Wafa; Middag, Rob; van de Flierdt, Tina; de Baa, Hein J. W. (2013-09-09)
    Cadmium concentrations and isotope compositions were determined for 47 seawater samples from the high nutrient low chlorophyll (HNLC) zone of the Atlantic sector of the Southern Ocean. The samples include 13 surface ...
  • Lacan, Francois; Francois, Roger; Ji, Yongcheng; Sherrell, Robert M. (2006-06-29)
    The oceanic cycle of cadmium is still poorly understood, despite its importance for phytoplankton growth and paleoceanographic applications. As for other elements that are biologically recycled, variations in isotopic ...
  • Doney, Scott C.; Schimel, David S. (2007-05-29)
    The global carbon and climate systems are closely intertwined, with biogeochemical processes responding to and driving climate variations. Over a range of geological and historical time-scales, warmer climate conditions ...
  • Longworth, Brett E.; Robinson, Laura F.; Roberts, Mark L.; Beaupre, Steven R.; Burke, Andrea; Jenkins, William J. (2012-04-17)
    This paper describes a technique for measuring the 14C content of carbonate samples by producing C-ions directly in the negative ion sputter source of an accelerator mass spectrometer (AMS) system. This direct analysis ...
  • Bach, Wolfgang; Rosner, Martin; Jons, Niels; Rausch, Svenja; Robinson, Laura F.; Paulick, Holger; Erzinger, Jorg (2011-09-02)
    Carbonate veins hosted in ultramafic basement drilled at two sites in the Mid Atlantic Ridge 15°N area record two different stages of fluid-basement interaction. A first generation of carbonate veins consists of calcite ...
  • Morris, Paul J.; Sanders, Richard J. (American Geophysical Union, 2011-07-08)
    Subantarctic islands in the high-nutrient, low-chlorophyll (HNLC) Southern Ocean are natural sources of iron and stimulate blooms in their proximity, such as the one observed close to the Crozet Islands (52°E, 46°S). During ...
  • Sailley, Sevrine F.; Ducklow, Hugh W.; Moeller, Holly V.; Fraser, William R.; Schofield, Oscar M. E.; Steinberg, Deborah K.; Garzio, Lori M.; Doney, Scott C. (Inter-Research, 2013-10-31)
    An inverse food-web model for the western Antarctic Peninsula (WAP) pelagic food web was constrained with data from Palmer Long Term Ecological Research (PAL-LTER) project annual austral summer sampling cruises. Model ...

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