Now showing items 2840-2859 of 5887

    • Large-area visually augmented navigation for autonomous underwater vehicles 

      Eustice, Ryan M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-06)
      This thesis describes a vision-based, large-area, simultaneous localization and mapping (SLAM) algorithm that respects the low-overlap imagery constraints typical of autonomous underwater vehicles (AUVs) while exploiting ...
    • Large-eddy simulation of the tidal-cycle variations of an estuarine boundary layer 

      Li, Ming; Radhakrishnan, Senthilkumaran; Piomelli, Ugo; Geyer, W. Rockwell (American Geophysical Union, 2010-08-03)
      The estuarine boundary layer affected by a horizontal density gradient exhibits temporal evolution over a tidal cycle, in a manner similar to the diurnal cycle of the ocean surface mixed layer. A large eddy simulation (LES) ...
    • Large-scale alignment of oceanic nitrate and density 

      Omand, Melissa M.; Mahadevan, Amala (John Wiley & Sons, 2013-10-15)
      By analyzing global data, we find that over large scales, surfaces of constant nitrate are often better aligned with isopycnals than with isobars, particularly below the euphotic zone. This is unexplained by the movement ...
    • Large-scale drainage capture and surface uplift in eastern Tibet–SW China before 24 Ma inferred from sediments of the Hanoi Basin, Vietnam 

      Clift, Peter D.; Blusztajn, Jerzy S.; Nguyen, Anh Duc (American Geophysical Union, 2006-10-10)
      Current models of drainage evolution suggest that the non-dendritic patterns seen in rivers in SE Asia reflect progressive capture of headwaters away from the Red River during and as a result of surface uplift of Eastern ...
    • Large-scale responses of complex-shaped coastlines to local shoreline stabilization and climate change 

      Slott, Jordan M.; Murray, A. Brad; Ashton, Andrew D. (American Geophysical Union, 2010-09-16)
      When modeling the large-scale (> km) evolution of coastline morphology, the influence of natural forces is not the only consideration; ongoing direct human manipulations can substantially drive geomorphic change. In this ...
    • Large-scale, realistic laboratory modeling of M2 internal tide generation at the Luzon Strait 

      Mercier, Matthieu J.; Gostiaux, Louis; Helfrich, Karl R.; Sommeria, Joel; Viboud, Samuel; Didelle, Henri; Ghaemsaidi, Sasan J.; Dauxois, Thierry; Peacock, Thomas (John Wiley & Sons, 2013-11-04)
      The complex double-ridge system in the Luzon Strait in the South China Sea (SCS) is one of the strongest sources of internal tides in the oceans, associated with which are some of the largest amplitude internal solitary ...
    • A large-volume, deep-sea submersible pumping system 

      Sachs, Peter L.; Hammar, Terence R.; Bacon, Michael P. (Woods Hole Oceanographic Institution, 1989-11)
      Eight self-contained, in-situ pumps have been used effectively and routinely by our group for the past six years to collect both particulate and dissolved phases from large volumes of sea water. Multiple pumps are rapidly ...
    • Larvae from afar colonize deep-sea hydrothermal vents after a catastrophic eruption 

      Mullineaux, Lauren S.; Adams, Diane K.; Mills, Susan W.; Beaulieu, Stace E. (2010-01-29)
      The planktonic larval stage is a critical component of life history in marine benthic species because it confers the ability to disperse, potentially connecting remote populations and leading to colonization of new sites. ...
    • Larval dispersal : vent life in the water column 

      Adams, Diane K.; Arellano, Shawn M.; Govenar, Breea (The Oceanography Society, 2012-03)
      Visually striking faunal communities of high abundance and biomass cluster around hydrothermal vents, but these animals don't spend all of their lives on the seafloor. Instead, they spend a portion of their lives as tiny ...
    • Larval dispersal between hydrothermal vent habitats 

      Kim, Stacy L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-01)
      Hydrothermal vents are isolated, short-term habitats that support unique biotic assemblages with relatively high biomass utilizing an unusual energy source. How these communities establish themselves and maintain species ...
    • Larval dispersion along an axially symmetric mid-ocean ridge 

      McGillicuddy, Dennis J.; Lavelle, J. William; Thurnherr, Andreas M.; Kosnyrev, V. K.; Mullineaux, Lauren S. (2009-12-22)
      We investigated planktonic larval transport processes along an axially symmetric mid-ocean ridge with characteristics similar to that of the East Pacific Rise (EPR) segment at 9-10°N. The hydrodynamic basis for this study ...
    • Larval ecology and synchronous reproduction of two crustacean species : Semibalanus balanoides in New England, USA and Gecarcinus quadratus in Veraguas, Panama 

      Gyory, Joanna (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-02)
      The environmental cues for synchronous reproduction were investigated for two highly abundant, ecologically important crustacean species: the temperate acorn barnacle, Semibalanus balanoides, and the tropical terrestrial ...
    • Larval responses to turbulence and temperature in a tidal inlet: Habitat selection by dispersing gastropods? 

      Fuchs, Heidi L.; Solow, Andrew R.; Mullineaux, Lauren S. (Sears Foundation for Marine Research, 2010-06)
      Marine larval dispersal is affected by hydrodynamic transport and larval behavior, but little is known about how behavior affects large-scale patterns of dispersal and recruitment. Intertidal habitats are characterized by ...
    • Larval settlement in flocculated particulates 

      Zimmer, Cheryl Ann; Starczak, Victoria R.; Arch, Victoria S.; Zimmer, Richard K. (Sears Foundation for Marine Research, 2008-03)
      Planktonic larval settlement can be a major determinant of population and community dynamics. Settlement templates of benthic invertebrates have been attributed to biological, chemical, and hydrodynamic mechanisms. Completely ...
    • Larval transport and dispersal in the coastal ocean and consequences for population connectivity 

      Pineda, Jesus; Hare, Jonathan A.; Sponaungle, Su (Oceanography Society, 2007-09)
      Many marine species have small, pelagic early life stages. For those species, knowledge of population connectivity requires understanding the origin and trajectories of dispersing eggs and larvae among subpopulations. ...
    • Laser (U-Th)/He thermochronology of detrital zircons as a tool for studying surface processes in modern catchments 

      Tripathy-Lang, Alka; Hodges, Kip V.; Monteleone, Brian D.; van Soest, Matthijs C. (John Wiley & Sons, 2013-07-26)
      Detrital mineral thermochronology of modern sediments is a valuable tool for interrogating landscape evolution. Detrital zircon (U-Th)/He thermochronology is of particular interest because zircons are durable and withstand ...
    • Laser diffraction particle sizing : sampling and inversion 

      Riley, James B. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-08-13)
      The inverse problem of obtaining particle size distributions from observations of the angular distribution of near forward scattered light is reexamined. Asymptotic analysis of the forward problem reveals the ...
    • Laser Raman spectroscopy as a technique for identification of seafloor hydrothermal and cold seep minerals 

      White, Sheri N. (2008-11)
      In situ sensors capable of real-time measurements and analyses in the deep ocean are necessary to fulfill the potential created by the development of autonomous, deep-sea platforms such as autonomous and remotely operated ...
    • Laser vision : lidar as a transformative tool to advance critical zone science 

      Harpold, A. A.; Marshall, J. A.; Lyon, S. W.; Barnhart, T. B.; Fisher, B. A.; Donovan, M.; Brubaker, K. M.; Crosby, C. J.; Glenn, N. F.; Glennie, C. L.; Kirchner, P. B.; Lam, N.; Mankoff, Kenneth D.; McCreight, J. L.; Molotch, N. P.; Musselman, K. N.; Pelletier, J.; Russo, T.; Sangireddy, H.; Sjooberg, Y.; Swetnam, T.; West, N. (Copernicus Publications on behalf of the European Geosciences Union, 2015-06-22)
      Observation and quantification of the Earth's surface is undergoing a revolutionary change due to the increased spatial resolution and extent afforded by light detection and ranging (lidar) technology. As a consequence, ...
    • Last deglaciation in the Okinawa Trough : subtropical northwest Pacific link to Northern Hemisphere and tropical climate 

      Sun, Youbin; Oppo, Delia W.; Xiang, Rong; Liu, Weiguo; Gao, Shu (American Geophysical Union, 2005-06-23)
      Detailed deglacial and Holocene records of planktonic δ18O and Mg/Ca–based sea surface temperature (SST) from the Okinawa Trough suggest that at ∼18 to 17 thousand years before present (kyr B.P.), late spring/early summer ...