Now showing items 614-633 of 840

  • Radar remote sensing estimates of waves and wave forcing at a tidal inlet 

    Diaz Mendez, Guillermo M.; Haller, Merrick C.; Raubenheimer, Britt; Elgar, Steve; Honegger, David A. (American Meteorological Society, 2015-04)
    The time and space variability of wave transformation through a tidal inlet is investigated with radar remote sensing. The frequency of wave breaking and the net wave breaking dissipation at high spatial resolution is ...
  • Radio LAN acquisition module (RLAM) : recent developments for high resolution data collection systems as implemented for the ONR sea ice mechanics experiment, spring 1994 

    von der Heydt, Keith; Eck, Calvert F. (Woods Hole Oceanographic Institution, 1995-05)
    During a recent experiment (April 1994), for the ONR Sea Ice Mechanics Initiative (SIMI), a portable data acquisition system was assembled that included 2 new developments. The first consists of a board, designed for the ...
  • Range compensation for backscattering measurements in the difference-frequency nearfield of a parametric sonar 

    Foote, Kenneth G. (Acoustical Society of America, 2012-05)
    Measurement of acoustic backscattering properties of targets requires removal of the range dependence of echoes. This process is called range compensation. For conventional sonars making measurements in the transducer ...
  • Rapid dispersal of a hydrothermal plume by turbulent mixing 

    Walter, Maren; Mertens, Christian; Stober, Uwe; German, Christopher R.; Yoerger, Dana R.; Sultenfuß, Jurgen; Rhein, Monika; Melchert, Bernd; Baker, Edward T. (2010-08-23)
    The water column imprint of the hydrothermal plume observed at the Nibelungen field (8°18' S 13°30' W) is highly variable in space and time. The off-axis location of the site, along the southern boundary of a non-transform ...
  • Rapid mixed layer depening by the combination of Langmuir and shear instabilities : a case study 

    Kukulka, Tobias; Plueddemann, Albert J.; Trowbridge, John H.; Sullivan, Peter P. (American Meteorological Society, 2010-11)
    Langmuir circulation (LC) is a turbulent upper-ocean process driven by wind and surface waves that contributes significantly to the transport of momentum, heat, and mass in the oceanic surface layer. The authors have ...
  • Rapid sediment deposition and fine-scale strata formation in the Hudson estuary 

    Traykovski, Peter A.; Geyer, W. Rockwell; Sommerfield, Christopher K. (American Geophysical Union, 2004-04-21)
    A 9 month time series of tripod-mounted optical and acoustic measurements of sediment concentration and bed elevation was used to examine depositional processes in relationship to hydrodynamic variables in the Hudson River ...
  • Rates and mechanisms of turbulent dissipation and mixing in the Southern Ocean : results from the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES) 

    Sheen, Katy L.; Brearley, J. A.; Naveira Garabato, Alberto C.; Smeed, D. A.; Waterman, Stephanie N.; Ledwell, James R.; Meredith, Michael P.; St. Laurent, Louis C.; Thurnherr, Andreas M.; Toole, John M.; Watson, Andrew J. (John Wiley & Sons, 2013-06-04)
    The spatial distribution of turbulent dissipation rates and internal wavefield characteristics is analyzed across two contrasting regimes of the Antarctic Circumpolar Current (ACC), using microstructure and finestructure ...
  • Rather‐high‐frequency sound scattering by swimbladdered fish 

    Foote, Kenneth G. (Acoustical Society of America, 1985-08)
    A new model describes acoustic scattering by swimbladdered fish of lengths from at least 8 to 36 wavelengths. It represents a fish by an ideal pressure‐release surface having the exact size and shape as the swimbladder. ...
  • Ray representation of sound scattering by weakly scattering deformed fluid cylinders : simple physics and application to zooplankton 

    Stanton, Timothy K.; Clay, Clarence S.; Chu, Dezhang (Acoustical Society of America, 1993-12)
    Data indicate that certain important types of marine organisms behave acoustically like weakly scattering fluid bodies (i.e., their material properties appear fluidlike and similar to those of the surrounding fluid medium). ...
  • Ray-acoustic caustic formation and timing effects from ocean sound-speed relative curvature 

    Duda, Timothy F.; Bowlin, James B. (Acoustical Society of America, 1994-08)
    Using deterministic ray-acoustic modeling of 1000-km propagation in the North Pacific, a depth-dependent parameter of ocean sound channels has been found to strongly influence geometrical ray propagation. This parameter ...
  • Real-time reporting of baleen whale passive acoustic detections from ocean gliders 

    Baumgartner, Mark F.; Fratantoni, David M.; Hurst, Thomas P.; Brown, Moira W.; Cole, Timothy V. N.; Van Parijs, Sofie M.; Johnson, Mark P. (Acoustical Society of America, 2013-08)
    In the past decade, much progress has been made in real-time passive acoustic monitoring of marine mammal occurrence and distribution from autonomous platforms (e.g., gliders, floats, buoys), but current systems focus ...
  • Real-time tomography mooring 

    Lynch, James F.; Frye, Daniel E.; Peal, Kenneth R.; Liberatore, Stephen P.; Kery, Sean M.; Hobart, Edward; Newhall, Arthur E.; Smith, Stephen P. (Woods Hole Oceanographic Institution, 1992-06)
    A real-time tomography system has been developed which combines ocean acoustic tomography with satellite-based time keeping and satellite telemetry. The basis of the system is the acoustic tomography transceiver and its ...
  • Reconstructing Columbus’s first transatlantic track and landfall using climatological winds and currents 

    Goldsmith, Roger A.; Richardson, Philip L. (Woods Hole Oceanographic Institution, 1987-11)
    An article in the November 1986 National Geographic magazine examined the question of Columbus's first landfall in the Americas. The author, Luis Marden, was the first to quantitatively include the effects of the winds ...
  • A red tide of Alexandrium fundyense in the Gulf of Maine 

    McGillicuddy, Dennis J.; Brosnahan, Michael L.; Couture, Darcie A.; He, Ruoying; Keafer, Bruce A.; Manning, James P.; Martin, Jennifer L.; Pilskaln, Cynthia H.; Townsend, David W.; Anderson, Donald M. (2013-04-15)
    In early July 2009, an unusually high concentration of the toxic dinoflagellate Alexandrium fundyense occurred in the western Gulf of Maine, causing surface waters to appear reddish brown to the human eye. The discolored ...
  • A reduced crustal magnetization zone near the first observed active hydrothermal vent field on the Southwest Indian Ridge 

    Zhu, Jian; Lin, Jian; Chen, Yongshun J.; Tao, Chunhui; German, Christopher R.; Yoerger, Dana R.; Tivey, Maurice A. (American Geophysical Union, 2010-09-21)
    Inversion of near-bottom magnetic data reveals a well-defined low crustal magnetization zone (LMZ) near a local topographic high (37°47′S, 49°39′E) on the ultraslow-spreading Southwest Indian Ridge (SWIR). The magnetic ...
  • Reflection and tunneling of ocean waves observed at a submarine canyon 

    Thomson, James M.; Elgar, Steve; Herbers, T. H. C. (American Geophysical Union, 2005-04-07)
    Ocean surface gravity waves with periods between 20 and 200 s were observed to reflect from a steep-walled submarine canyon. Observations of pressure and velocity on each side of the canyon were decomposed into incident waves ...
  • Reflection of underwater sound from surface waves 

    Tindle, Chris T.; Deane, Grant B.; Preisig, James C. (Acoustical Society of America, 2009-01)
    A tank experiment has been conducted to measure reflection of underwater sound from surface waves. Reflection from a wave crest leads to focusing and caustics and results in rapid variation in the received waveform as the ...
  • Refraction and reflection of infragravity waves near submarine canyons 

    Thomson, James M.; Elgar, Steve; Herbers, T. H. C.; Raubenheimer, Britt; Guza, R. T. (American Geophysical Union, 2007-10-10)
    The propagation of infragravity waves (ocean surface waves with periods from 20 to 200 s) over complex inner shelf (water depths from about 3 to 50 m) bathymetry is investigated with field observations from the southern ...
  • Refraction of surface gravity waves by shear waves 

    Henderson, Stephen M.; Guza, R. T.; Elgar, Steve; Herbers, T. H. C. (American Meteorological Society, 2006-04)
    Previous field observations indicate that the directional spread of swell-frequency (nominally 0.1 Hz) surface gravity waves increases during shoreward propagation across the surf zone. This directional broadening contrasts ...
  • Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre 

    Fernandez-Castro, B.; Anderson, Laurence A.; Maranon, E.; Neuer, Susanne; Ausiin, B.; Gonzalez-Davila, M.; Santana-Casiano, J. M.; Cianca, Andrés; Santana, R.; Llinas, Octavio; Rueda, María José; Mourino-Carballido, Beatriz (Copernicus Publications on behalf of the European Geosciences Union, 2012-08-01)
    We used 5-yr concomitant data of tracer distribution from the BATS (Bermuda Time-series Study) and ESTOC (European Station for Time-Series in the Ocean, Canary Islands) sites to build a 1-D tracer model conservation including ...