Now showing items 41-60 of 971

    • An assessment of the Atlantic and Arctic sea–air CO2 fluxes, 1990–2009 

      Schuster, Ute; McKinley, Galen A.; Bates, Nicholas R.; Chevallier, F.; Doney, Scott C.; Fay, A. R.; Gonzalez-Davila, M.; Gruber, Nicolas; Jones, S.; Krijnen, J.; Landschutzer, Peter; Lefevre, N.; Manizza, Manfredi; Mathis, Jeremy T.; Metzl, Nicolas; Olsen, Are; Rios, Aida F.; Rodenbeck, C.; Santana-Casiano, J. M.; Takahashi, Taro; Wanninkhof, Rik; Watson, Andrew J. (Copernicus Publications on behalf of the European Geosciences Union, 2013-01-29)
      The Atlantic and Arctic Oceans are critical components of the global carbon cycle. Here we quantify the net sea–air CO2 flux, for the first time, across different methodologies for consistent time and space scales for the ...
    • An assessment of the use of sediment traps for estimating upper ocean particle fluxes 

      Buesseler, Ken O.; Antia, Avan N.; Chen, Min; Fowler, Scott W.; Gardner, Wilford D.; Gustafsson, Orjan; Harada, Koh; Michaels, Anthony F.; Rutgers van der Loeff, Michiel M.; Sarin, Manmohan M.; Steinberg, Deborah K.; Trull, Thomas W. (Sears Foundation for Marine Research, 2007-05)
      This review provides an assessment of sediment trap accuracy issues by gathering data to address trap hydrodynamics, the problem of zooplankton "swimmers," and the solubilization of material after collection. For each ...
    • Asteroid breakup linked to the Great Ordovician Biodiversification Event 

      Schmitz, Birger; Harper, David A. T.; Peucker-Ehrenbrink, Bernhard; Stouge, Svend; Alwmark, Carl; Cronholm, Anders; Bergstrom, Stig M.; Tassinari, Mario; Xiaofeng, Wang (2007-09-26)
      The rise and diversification of shelled invertebrate life in the early Phanerozoic took place in two major steps. During the Cambrian Explosion at ca. 540 Ma a large number of new phyla appeared over a short time interval. ...
    • Atmospheric carbon dioxide variability in the Community Earth System Model : evaluation and transient dynamics during the twentieth and twenty-first centuries 

      Keppel-Aleks, Gretchen; Randerson, James T.; Lindsay, Keith; Stephens, Britton B.; Moore, J. Keith; Doney, Scott C.; Thornton, Peter E.; Mahowald, Natalie M.; Hoffman, Forrest M.; Sweeney, Colm; Tans, Pieter P.; Wennberg, Paul O.; Wofsy, Steven C. (American Meteorological Society, 2013-07-01)
      Changes in atmospheric CO2 variability during the twenty-first century may provide insight about ecosystem responses to climate change and have implications for the design of carbon monitoring programs. This paper describes ...
    • Atmospheric mercury and fine particulate matter in coastal New England : implications for mercury and trace element sources in the northeastern United States 

      Kolker, Allan; Engle, Mark A.; Peucker-Ehrenbrink, Bernhard; Geboy, Nicholas J.; Krabbenhoft, David P.; Bothner, Michael H.; Tate, Michael T. (Elsevier B.V., 2013-08-29)
      Intensive sampling of ambient atmospheric fine particulate matter was conducted at Woods Hole, Massachusetts over a four-month period from 3 April to 29 July, 2008, in conjunction with year-long deployment of the USGS ...
    • Authigenic iron oxide proxies for marine zinc over geological time and implications for eukaryotic metallome evolution 

      Robbins, L. J.; Lalonde, S. V.; Saito, Mak A.; Planavsky, Noah J.; Mloszewska, A. M.; Pecoits, E.; Scott, C.; Dupont, C. L.; Kappler, A.; Konhauser, K. O. (2012-12)
      Here we explore enrichments in paleomarine Zn as recorded by authigenic iron oxides including Precambrian iron formations, ironstones and Phanerozoic hydrothermal exhalites. This compilation of new and literature-based ...
    • Authigenic uranium in foraminiferal coatings : a proxy for ocean redox chemistry 

      Boiteau, Rene M.; Greaves, Mervyn; Elderfield, Henry (American Geophysical Union, 2012-09-08)
      The rate of uranium accumulation in oceanic sediments from seawater is controlled by bottom water oxygen concentrations and organic carbon fluxes—two parameters that are linked to deep ocean storage of CO2. To investigate ...
    • An autonomous instrument for time series analysis of TCO2 from oceanographic moorings 

      Sayles, Frederick L.; Eck, Calvert F. (2009-04-13)
      The design and testing of a robotic analyzer for autonomous TCO2 measurement from oceanographic moorings is described. The analyzer employs a conductimetric method of TCO2 measurement wherein CO2 from an acidified sample ...
    • Autonomous, high-resolution observations of particle flux in the oligotrophic ocean 

      Estapa, Margaret L.; Buesseler, Ken O.; Boss, Emmanuel S.; Gerbi, Gregory P. (Copernicus Publications on behalf of the European Geosciences Union, 2013-08-16)
      Observational gaps limit our understanding of particle flux attenuation through the upper mesopelagic because available measurements (sediment traps and radiochemical tracers) have limited temporal resolution, are ...
    • Auxiliary material for "Estimates of new and total productivity in central Long Island Sound from in situ measurements of nitrate and dissolved oxygen" 

      Collins, James R.; Raymond, Peter A.; Bohlen, Walter Franklin; Howard-Strobe, Mary M. (2013)
      Biogeochemical cycles in estuaries are regulated by a diverse set of physical and biological variables that operate over a variety of time scales. Using in situ optical sensors, we conducted a high-frequency time-series ...
    • A bacterial quorum-sensing precursor induces mortality in the marine coccolithophore, Emiliania huxleyi 

      Harvey, Elizabeth L.; Deering, Robert W.; Rowley, David C.; El Gamal, Abrahim; Schorn, Michelle A.; Moore, Bradley S.; Johnson, Matthew D.; Mincer, Tracy J.; Whalen, Kristen E. (Frontiers Media, 2016-02-03)
      Interactions between phytoplankton and bacteria play a central role in mediating biogeochemical cycling and food web structure in the ocean. However, deciphering the chemical drivers of these interspecies interactions ...
    • 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 ...
    • Barium isotopes reveal role of ocean circulation on barium cycling in the Atlantic 

      Bates, Stephanie L.; Hendry, Katharine R.; Pryer, Helena V.; Kinsley, Christopher W.; Pyle, Kimberley M.; Woodward, E. Malcolm S.; Horner, Tristan J. (2017-02-02)
      We diagnose the relative influences of local-scale biogeochemical cycling and regional-scale ocean circulation on Atlantic barium cycling by analyzing four new depth profiles of dissolved Ba concentrations and isotope ...
    • Barium-isotopic fractionation in seawater mediated by barite cycling and oceanic circulation 

      Horner, Tristan J.; Kinsley, Christopher W.; Nielsen, Sune G. (2015-07-09)
      The marine biogeochemical cycle of Ba is thought to be controlled by particulate BaSO4 (barite) precipitation associated with the microbial oxidation of organic carbon and its subsequent dissolution in the BaSO4-undersa ...
    • 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, Frederick 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 ...