Now showing items 384-403 of 7200

  • Assessment in the everyday life of the library 

    Avery, Beth (IAMSLIC, 2010)
  • An assessment of Arctic Ocean freshwater content changes from the 1990s to the 2006-2008 period 

    Rabe, Benjamin; Karcher, Michael; Schauer, Ursula; Toole, John M.; Krishfield, Richard A.; Pisarev, Sergey; Kauker, Frank; Gerdes, Rudiger; Kikuchi, Takashi (2010-12-10)
    Unprecedented summer-season sampling of the Arctic Ocean during the period 2006−2008 makes possible a quasi-synoptic estimate of liquid freshwater (LFW) inventories in the Arctic Ocean basins. In comparison to observations ...
  • Assessment of flagellate diversity at deep-sea hydrothermal vents using the combined approach of culture-dependent and culture-independent methods 

    Atkins, Michael S. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-05)
    Eighteen strains of flagellated protists representing 9 species were isolated and cultured from four deep-sea hydrothermal vents in the Eastern Pacific Ocean: Juan de Fuca Ridge, Guaymas Basin, and both 21°N and 9°N on ...
  • Assessment of groundwater discharges into West Neck Bay, New York, via natural tracers 

    Dulaiova, Henrieta; Burnett, William C.; Chanton, Jeffrey P.; Moore, Willard S.; Bokuniewicz, H. J.; Charette, Matthew A.; Sholkovitz, Edward R. (2006-05-21)
    A field experiment to compare methods of assessing submarine groundwater discharge (SGD) was held on Shelter Island, NY, in May 2002. We evaluated the use of radon, radium isotopes, and methane to assess SGD rates and ...
  • Assessment of management to mitigate anthropogenic effects on large whales 

    van der Hoop, Julie M.; Moore, Michael J.; Barco, Susan G.; Cole, Timothy V. N.; Daoust, Pierre-Yves; Henry, Allison G.; McAlpine, Donald F.; McLellan, William A.; Wimmer, Tonya; Solow, Andrew R. (John Wiley & Sons, 2012-10-01)
    United States and Canadian governments have responded to legal requirements to reduce human-induced whale mortality via vessel strikes and entanglement in fishing gear by implementing a suite of regulatory actions. We ...
  • Assessment of mesoscale eddy parameterizations for coarse resolution ocean models 

    Solovev, Mikhail A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-09)
    Climate simulation with numerical oceanic models requires a proper parameterization scheme in order to represent the effects of unresolved mesoscale eddies. Even though a munber of schemes have been proposed and some ...
  • An assessment of particulate organic carbon to thorium-234 ratios in the ocean and their impact on the application of 234Th as a POC flux proxy 

    Buesseler, Ken O.; Benitez-Nelson, Claudia R.; Burd, Adrian B.; Charette, Matthew A.; Cochran, J. Kirk; Coppola, L.; Fisher, Nicholas S.; Fowler, S. W.; Gardner, Wilford D.; Guo, L. D.; Gustafsson, Orjan; Lamborg, Carl H.; Masque, Pere; Miquel, Juan Carlos; Passow, Uta; Santschi, Peter H.; Savoye, Nicolas; Stewart, G.; Trull, Thomas W. (2005-06-18)
    Thorium-234 is increasingly used as a tracer of ocean particle flux, primarily as a means to estimate particulate organic carbon export from the surface ocean. This requires determination of both the 234Th activity ...
  • Assessment of skill and portability in regional marine biogeochemical models : role of multiple planktonic groups 

    Friedrichs, Marjorie A. M.; Dusenberry, Jeffrey A.; Anderson, Laurence A.; Armstrong, Robert A.; Chai, Fei; Christian, James R.; Doney, Scott C.; Dunne, John P.; Fujii, Masahiko; Hood, Raleigh; McGillicuddy, Dennis J.; Moore, J. Keith; Schartau, Markus; Spitz, Yvette H.; Wiggert, Jerry D. (American Geophysical Union, 2007-08-02)
    Application of biogeochemical models to the study of marine ecosystems is pervasive, yet objective quantification of these models' performance is rare. Here, 12 lower trophic level models of varying complexity are objectively ...
  • 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, P.; Lefevre, N.; Manizza, Manfredi; Mathis, Jeremy T.; Metzl, Nicolas; Olsen, A.; 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 ...
  • Assessment of tsunami hazard to the U.S. Atlantic margin 

    ten Brink, Uri S.; Chaytor, Jason D.; Geist, Eric L.; Brothers, Daniel S.; Andrews, Brian D. (Elsevier, 2014-03-22)
    Tsunami hazard is a very low-probability, but potentially high-risk natural hazard, posing unique challenges to scientists and policy makers trying to mitigate its impacts. These challenges are illustrated in this assessment ...
  • An assessment of upper mantle heterogeneity based on abyssal peridotite isotopic compositions 

    Warren, Jessica M.; Shimizu, Nobumichi; Sakaguchi, C.; Dick, Henry J. B.; Nakamura, E. (American Geophysical Union, 2009-12-17)
    Abyssal peridotites, the depleted solid residues of ocean ridge melting, are the most direct samples available to assess upper oceanic mantle composition. We present detailed isotope and trace element analyses of pyroxene ...
  • Assimilation of altimeter data in a quasi-geostrophic model of the Gulf Stream system : a dynamical perspective 

    Capontondi, Antonietta (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-02)
    The dynamical aspects involved in the assimilation of altimeter data in a numerical ocean model have been investigated. The model used for this study is a quasi-geostrophic model of the Gulf Stream region. The data that ...
  • Assimilatory sulfur metabolism in marine microorganisms 

    Cuhel, Russell Lee (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-12)
    The reductive assimilation of sulfate into cellular organic sulfur compounds was studied in aerobic marine bacteria, with emphasis on the relationship between sulfur metabolism and protein synthesis. The goal of the ...
  • Associations between North Pacific right whales and their zooplanktonic prey in the southeastern Bering Sea 

    Baumgartner, Mark F.; Lysiak, Nadine S. J.; Esch, H. Carter; Zerbini, Alexandre N.; Berchok, Catherine L.; Clapham, Phillip J. (Inter-Research, 2013-09-17)
    Due to the seriously endangered status of North Pacific right whales Eubalaena japonica, an improved understanding of the environmental factors that influence the species’ distribution and occurrence is needed to better ...
  • 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. ...
  • Astrophysical and geophysical flows as dynamical systems : 1998 summer study program in Geophysical Fluid Dynamics 

    Balmforth, Neil J. (Woods Hole Oceanographic Institution, 1999-01)
    The theme of the 1998 Geophyscial Fluid Dynamics (GFD) summer program at the Woods Hole Oceanographic Institution was Astrophysical and Geophysical Flows as Dynamical Systems. Antonello Provenzale of the Institute of ...
  • Asymmetric shallow mantle structure beneath the Hawaiian Swell—evidence from Rayleigh waves recorded by the PLUME network 

    Laske, Gabi; Markee, Amanda; Orcutt, John A.; Wolfe, Cecily J.; Collins, John A.; Solomon, Sean C.; Detrick, Robert S.; Bercovici, David; Hauri, Erik H. (John Wiley & Sons, 2011-10-31)
    We present models of the 3-D shear velocity structure of the lithosphere and asthenosphere beneath the Hawaiian hotspot and surrounding region. The models are derived from long-period Rayleigh-wave phase velocities that ...
  • Asymmetric tidal mixing due to the horizontal density gradient 

    Li, Ming; Trowbridge, John H.; Geyer, W. Rockwell (American Meteorological Society, 2008-02)
    Stratification and turbulent mixing exhibit a flood–ebb tidal asymmetry in estuaries and continental shelf regions affected by horizontal density gradients. The authors use a large-eddy simulation (LES) model to investigate ...
  • An asymmetric upwind flow, Yellow Sea Warm Current : 1. New observations in the western Yellow Sea 

    Lin, Xiaopei; Yang, Jiayan; Guo, Jingsong; Zhang, Zhixin; Yin, Yuqi; Song, Xiangzhou; Zhang, Xiaohui (American Geophysical Union, 2011-04-29)
    The winter water mass along the Yellow Sea Trough (YST), especially on the western side of the trough, is considerably warmer and saltier than the ambient shelf water mass. This observed tongue-shape hydrographic feature ...