Now showing items 309-328 of 843

  • The feasibility of sodar wind profile measurements from an oceanographic buoy 

    Berg, Allison M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-09)
    This thesis explores the feasibility of making wind speed measurements from an oceanographic buoy using a Doppler sodar. In the fall of 2005, we deployed a Scintec SFAS sodar on an ASIS buoy. Roughly one week of buoy ...
  • Feasibility study of non-invasive telemetry techniques for use with submarine telephone cables 

    Brown, Neil L.; Frye, Daniel E.; Proakis, John (Woods Hole Oceanographic Institution, 1993-01)
    The feasibility of using inductive coupling with existing submarine telephone cables for telemetry of data from ocean sensors was investigated. The submarine telephone cable was simulated with a computer model and the ...
  • Field deployable dynamic lighting system for turbid water imaging 

    Gorman, Geoffrey A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-09)
    The ocean depths provide an ever changing and complex imaging environment. As scientists and researches strive to document and study more remote and optically challenging areas, specifically scatter-limited environments. ...
  • A field investigation of diffusion within a submerged plant canopy 

    Tarrell, Alvin E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1997-09)
    Saltwater marshes and wetlands are important buffers at the land-sea interface. Among the most biologically active ecosystems on Earth, natural and man-made wetlands are important interceptors of pollutants and nutrients ...
  • Field measurements of a swell band, shore normal, flux divergence reversal 

    Link, Shmuel G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
    Throughout this thesis we will discuss the theoretical background and empirical observation of a swell band shore normal flux divergence reversal. Specifically, we will demonstrate the existence and persistence of the ...
  • Field observations of shear waves in the surf zone 

    Noyes, T. James; Guza, R. T.; Elgar, Steve; Herbers, T. H. C. (American Geophysical Union, 2004-01-31)
    Alongshore propagating meanders of the mean alongshore current in the surf zone called shear waves have periods of a few minutes and wavelengths of a few hundred meters. Here shear wave properties are estimated with arrays ...
  • Field observations of swash zone infragravity motions and beach cusp evolution 

    Ciriano, Yolanda; Coco, Giovanni; Bryan, K. R.; Elgar, Steve (American Geophysical Union, 2005-02-22)
    Fluid flows consistent with low-mode edge waves were evident in video observations of swash motions during a field experiment in which beach cusps developed on an initially smooth beach. As beach cusps grew, energy lying ...
  • Finestructure and turbulence in the deep ocean 

    Hendricks, Peter J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1977-01)
    Millimeter scale fluctuations in refractive index recorded with a freely sinking shadowgraph system are correlated with finestructure profiles of temperature, salinity and density and compared to models of ocean turbulence. ...
  • Fish target strengths for use in echo integrator surveys 

    Foote, Kenneth G. (Acoustical Society of America, 1987-09)
    In situ measurements of fish target strength are selected for use in echo integrator surveys at 38 kHz. The results are expressed through equations in which the mean target strength TS is regressed on the mean fish length ...
  • FISH_ROCK : a tool for identifying and counting benthic organisms in bottom photographs 

    Ferrini, Vicki L.; Singh, Hanumant (Woods Hole Oceanographic Institution, 2006-01)
    Recent advances in underwater robotics and imaging technology now enable the rapid acquisition of large datasets of near-bottom high-resolution digital imagery. These images provide the potential for developing a non-invasive ...
  • Flood dispersal and deposition by near-bed gravitational sediment flows and oceanographic transport : a numerical modeling study of the Eel River shelf, northern California 

    Harris, Courtney K.; Traykovski, Peter A.; Geyer, W. Rockwell (American Geophysical Union, 2005-09-30)
    A large flood of the Eel River, northern California, created a thick sediment deposit between water depths of 50 and 70 m in January 1997. The freshwater plume, however, confined sediment delivery to water depths shallower ...
  • Flow disturbances generated by feeding and swimming zooplankton 

    Kiørboe, Thomas; Jiang, Houshuo; Goncalves, Rodrigo Javier; Nielsen, Lasse Tor; Wadhwa, Navish (2014-03)
    Interactions between planktonic organisms, such as detection of prey, predators, and mates, are often mediated by fluid signals. Consequently, many plankton predators perceive their prey from the fluid disturbances that ...
  • Flow of supersonic jets across flat plates : implications for ground-level flow from volcanic blasts 

    Orescanin, Mara M.; Prisco, David; Austin, Joanna M.; Kieffer, Susan W. (John Wiley & Sons, 2014-04-24)
    We report on laboratory experiments examining the interaction of a jet from an overpressurized reservoir with a canonical ground surface to simulate lateral blasts at volcanoes such as the 1980 blast at Mount St. Helens. ...
  • Fluctuation of 400-Hz sound intensity in the 2001 ASIAEX South China Sea experiment 

    Duda, Timothy F.; Lynch, James F.; Newhall, Arthur E.; Wu, Lixin; Chiu, Ching-Sang (IEEE, 2004-10)
    We present analyses of fluctuations seen in acoustic signals transmitted by two 400-Hz sources moored as part of the ASIAEX 2001 South China Sea (SCS) experiment. One source was near the bottom in 350-m deep water 31.3 km ...
  • The fluid dynamics of swimming by jumping in copepods 

    Jiang, Houshuo; Kiørboe, Thomas (2010-11-04)
    Copepods swim either continuously by vibrating their feeding appendages or erratically by repeatedly beating their swimming legs resulting in a series of small jumps. The two swimming modes generate different hydrodynamic ...
  • Fluid interactions that enable stealth predation by the upstream-foraging hydromedusa Craspedacusta sowerbyi 

    Lucas, K.; Colin, Sean P.; Costello, John H.; Katija, Kakani; Klos, E. (Marine Biological Laboratory, 2013-09-01)
    Unlike most medusae that forage with tentacles trailing behind their bells, several species forage upstream of their bells using aborally located tentacles. It has been hypothesized that these medusae forage as stealth ...
  • Fluid mechanical measurements within the bottom boundary layer during coastal mixing and optics 

    Fredericks, Janet J.; Trowbridge, John H.; Williams, Albert J.; Voulgaris, George; Shaw, William J. (Woods Hole Oceanographic Institution, 2001-08)
    To quantify and understand the role of vertical mixing processes in determining mid-shelf vertical structure of hydrographic and optical properties and particulate matter, the Office of Naval Research (ONR) funded a program ...
  • Fluid mechanical measurements within the boundary layer over the northern California Continental Shelf during STRESS 

    Fredericks, Janet J.; Trowbridge, John H.; Williams, Albert J.; Lentz, Steven J.; Butman, Bradford; Gross, Thomas F. (Woods Hole Oceanographic Institution, 1993-09)
    In studying the processes controlling particle distrbution of fine sediments over the continental shelf, the height, structure and dynamics of the bottom boundary layer must be better understood. The Sediment Transport ...
  • Fluxes and gas transfer rates of the biogenic trace gas DMS derived from atmospheric gradients 

    Zemmelink, Hendrik J.; Dacey, John W. H.; Hintsa, Eric J.; McGillis, Wade R.; Gieskes, Winfried W. C.; Klaassen, Wim; de Groot, Henk W.; Baar, Hein J. W. de (American Geophysical Union, 2004-06-30)
    Gas transfer rates were determined from vertical profile measurements of atmospheric dimethylsulfide (DMS) gradients over the equatorial Pacific Ocean obtained during the GasEx-2001 cruise. A quadratic relationship between ...
  • The Flying Fish, an untethered oceanographic sensor platform with acoustic homing capability 

    Hoyt, Joshua King (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1986-05)
    The Flying Fish is an autonomous, streamlined, gravity driven underwater vehicle of high speed (15 knots) vertical excursions to depths of 6000 meters. This prototype uses short baseline acoustic interferometry to guide ...