Now showing items 2657-2676 of 7623

    • Forward scattering of a pulsed continuous wave signal through laminar and turbulent thermal plumes 

      Bowen, Stephen G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1993-09)
      The results of an experiment examining the forward propagation or an acoustic signal through a buoyant plume are discussed. Two distinct testing sights were used. One made use of a small fresh water tank in NUWC to provide ...
    • Forward sound propagation around seamounts : application of acoustic models to the Kermit-Roosevelt and Elvis seamounts 

      Kim, Hyun Joe (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-06)
      The Basin Acoustic Seamount Scattering Experiment (BASSEX) of 2004 was conducted to measure forward-scattering around the Kermit-Roosevelt Seamount Complex in the Northeast Pacific. The BASSEX experiment was focused on ...
    • A fossil winonaite-like meteorite in Ordovician limestone : a piece of the impactor that broke up the L-chondrite parent body? 

      Schmitz, Birger; Huss, Gary R.; Meier, Matthias M. M.; Peucker-Ehrenbrink, Bernhard; Church, Ross P.; Cronholm, Anders; Davies, Melvyn B.; Heck, Philipp R.; Johansen, Anders; Keil, Klaus; Kristiansson, Per; Ravizza, Gregory E.; Tassinari, Mario; Terfelt, Fredrik (Elsevier, 2014-06-06)
      About a quarter of all meteorites falling on Earth today originate from the breakup of the L-chondrite parent body ∼470 Ma∼470 Ma ago, the largest documented breakup in the asteroid belt in the past ∼3 Ga∼3 Ga. A window ...
    • Four current meter models compared in strong currents in Drake Passage 

      Watts, D. Randolph; Kennelly, Maureen A.; Donohue, Kathleen A.; Tracey, Karen L.; Chereskin, Teresa K.; Weller, Robert A.; Victoria, Ivan (American Meteorological Society, 2013-10)
      Seven current meters representing four models on a stiffly buoyed mooring were placed for an 11-month deployment to intercompare their velocity measurements: two vector-measuring current meters (VMCMs), two Aanderaa recording ...
    • Four hydrophone array for acoustic three-dimensional location 

      Watkins, William A.; Schevill, William E. (Woods Hole Oceanographic Institution, 1971-10)
      This report describes a non-rigid, floating, four-hydrophone array that can give accurate three-dimensional locations for certain underwater sound sources, particularly for those that are close. For more distant sounds, ...
    • Four-bar linkage modelling in teleost pharyngeal jaws : computer simulations of bite kinetics 

      Grubich, Justin R.; Westneat, Mark W. (2006-01-25)
      The pharyngeal arches of the red drum (Sciaenops ocellatus) possess large toothplates and a complex musculoskeletal design for biting and crushing hard prey. The morphology of pharyngeal apparatus is described from dissections ...
    • FOZO, HIMU, and the rest of the mantle zoo 

      Stracke, Andreas; Hofmann, Albrecht W.; Hart, Stanley R. (American Geophysical Union, 2005-05-19)
      The parameter μ describes the 238U/204Pb ratio of an Earth reservoir. Mantle domains labeled HIMU (high μ) originally defined reservoirs with highly radiogenic Pb isotope ratios observed in basalts from a select number of ...
    • Fractional solubility of aerosol iron : synthesis of a global-scale data set 

      Sholkovitz, Edward R.; Sedwick, Peter N.; Church, Thomas M.; Baker, Alexander R.; Powell, Claire F. (2012-04-06)
      Aerosol deposition provides a major input of the essential micronutrient iron to the open ocean. A critical parameter with respect to biological availability is the proportion of aerosol iron that enters the oceanic ...
    • Fractional solubility of aerosol iron : synthesis of a global-scale data set 

      Sholkovitz, Edward R.; Sedwick, Peter N.; Church, Thomas M.; Baker, Alexander R.; Powell, Claire F. (2011-10-05)
      Aerosol deposition provides a major input of the essential micronutrient iron to the open ocean. A critical parameter with respect to bioavailability is the proportion of aerosol iron that enters the oceanic dissolved ...
    • Fractional solubility of aerosol iron : synthesis of a global-scale data set [revised] 

      Sholkovitz, Edward R.; Sedwick, Peter N.; Church, Thomas M.; Baker, Alexander R.; Powell, Claire F. (2012-03-26)
      Aerosol deposition provides a major input of the essential micronutrient iron to the open ocean. A critical parameter with respect to biological availability is the proportion of aerosol iron that enters the oceanic ...
    • Fracture propagation to the base of the Greenland Ice Sheet during supraglacial lake drainage 

      Das, Sarah B.; Joughin, Ian; Behn, Mark D.; Howat, Ian M.; King, Matt A.; Lizarralde, Daniel; Bhatia, Maya P. (2008-02-20)
      Surface meltwater that reaches the base of an ice sheet creates a mechanism for the rapid response of ice flow to climate change. The process whereby such a pathway is created through thick, cold ice has not, however, ...
    • Fragment reattachment, reproductive status, and health indicators of the invasive colonial tunicate Didemnum vexillum with implications for dispersal 

      Morris, James A.; Carman, Mary R. (2012-04)
      The invasive colonial tunicate Didemnum vexillum is now widespread in coastal and offshore waters of New England, USA. D. vexillum can inflict ecological and economic damage through biofouling and habitat modification. ...
    • A framework for a marine biodiversity observing network within changing continental shelf seascapes 

      Muller-Karger, Frank E.; Kavanaugh, Maria T.; Montes, Enrique; Balch, William M.; Breitbart, Mya; Chavez, Francisco P.; Doney, Scott C.; Johns, Elizabeth M.; Letelier, Ricardo M.; Lomas, Michael W.; Sosik, Heidi M.; White, Angelicque E. (The Oceanography Society, 2014-06)
      Continental shelves and the waters overlying them support numerous industries as diverse as tourism and recreation, energy extraction, fisheries, transportation, and applications of marine bio-molecules (e.g., agribusiness, ...
    • A framework for quantifying the magnitude and variability of community responses to global change drivers 

      Avolio, Meghan L.; La Pierre, Kimberly J.; Houseman, Gregory R.; Koerner, Sally E.; Grman, Emily; Isbell, Forest; Johnson, David S.; Wilcox, Kevin R. (John Wiley & Sons, 2015-12-21)
      A major challenge in global change ecology is to predict the trajectory and magnitude of community change in response to global change drivers (GCDs). Here, we present a new framework that not only increases the predictive ...
    • A framework for the probabilistic analysis of meteotsunamis 

      Geist, Eric L.; ten Brink, Uri S.; Gove, Matthew (Springer, 2014-06-19)
      A probabilistic technique is developed to assess the hazard from meteotsunamis. Meteotsunamis are unusual sea-level events, generated when the speed of an atmospheric pressure or wind disturbance is comparable to the phase ...
    • A framework to assess biogeochemical response to ecosystem disturbance using nutrient partitioning ratios 

      Kranabetter, J. Marty; McLauchlan, Kendra K.; Enders, Sara K.; Fraterrigo, Jennifer M.; Higuera, Philip E.; Morris, Jesse L.; Rastetter, Edward B.; Barnes, Rebecca T.; Buma, Brian; Gavin, Daniel; Gerhart, Laci M.; Gillson, Lindsey; Hietz, Peter; Mack, Michelle C.; McNeil, Brenden; Perakis, Steven S. (2015-11)
      Disturbances affect almost all terrestrial ecosystems, but it has been difficult to identify general principles regarding these influences. To improve our understanding of the long-term consequences of disturbance on ...
    • Free-surface turbulence and air-water gas exchange 

      McKenna, Sean P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-09)
      This thesis investigates the physical mechanisms of air-water gas transfer through direct measurements of turbulence at the air--water interface. To enable this study, a new approach to the particle image velocimetry ...
    • Frequency dependence and intensity fluctuations due to shallow water internal waves 

      Badiey, Mohsen; Katsnelson, Boris G.; Lynch, James F.; Pereselkov, Serguey (Acoustical Society of America, 2007-08)
      A theory and experimental results for sound propagation through an anisotropic shallow water environment are presented to examine the frequency dependence of the scintillation index in the presence of internal waves. The ...
    • Frequently asked questions about ocean acidification 

      Cooley, Sarah R.; Mathis, Jeremy T.; Yates, Kimberly K.; Turley, Carol (U.S. Ocean Carbon and Biogeochemistry Program and the UK Ocean Acidification Research Programme., 2012-09-15)
      Over the past five years, no other issue has received more attention in the marine science community than ocean acidification. Ocean acidification is a multi-disciplinary research area that encompasses topics such as ...