Now showing items 5082-5101 of 7199

  • Physical and biological variables affecting seabird distributions during the upwelling season of the northern California Current 

    Ainley, David G.; Spear, Larry B.; Tynan, Cynthia T.; Barth, John A.; Pierce, Stephen D.; Ford, R. Glenn; Cowles, Timothy J. (2004-08-28)
    As a part of the GLOBEC-Northeast Pacific project, we investigated variation in the abundance of marine birds in the context of biological and physical habitat conditions in the northern portion of the California Current ...
  • Physical control of the distributions of a key Arctic copepod in the northeast Chukchi Sea 

    Elliott, Stephen M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2015-06)
    The copepod Calanus glacialis is one of the most important zooplankton taxa in the Arctic shelf seas where it serves as a key grazer, predator, and food source. Its summer distribution and abundance have direct effects ...
  • Physical controls on copepod aggregations in the Gulf of Maine 

    Woods, Nicholas W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
    This thesis explores the role that the circulation in the Gulf of Maine (GOM) plays in determining the distribution of dense aggregations of copepods. These aggregations are an important part of the marine ecosystem, ...
  • Physical controls on hypoxia in Chesapeake Bay : a numerical modeling study 

    Scully, Malcolm E. (John Wiley & Sons, 2013-03-14)
    A three-dimensional circulation model with a relatively simple dissolved oxygen model is used to examine the role that physical forcing has on controlling hypoxia and anoxia in Chesapeake Bay. The model assumes that the ...
  • Physical exchanges at the air–sea interface : UK–SOLAS field measurements 

    Brooks, Ian M.; Bloom, A. Anthony; Brooks, Barbara J.; Lingard, Justin J. N.; McQuaid, James B.; Norris, Sarah J.; Smith, Michael H.; Smith, Paul D.; Yelland, Margaret J.; Moat, Ben I.; Pascal, Robin W.; Prytherch, John; Srokosz, Meric; Taylor, Peter K.; Upstill-Goddard, Robert C.; Salter, Matt; Nightingale, Philip D.; Archer, Stephen D.; Beale, Rachael; Dixon, Jo; Goldson, Laura E.; Hardman-Mountford, Nick; Liddicoat, Malcolm; Moore, Gerald; Stephens, John A.; D'Asaro, Eric A.; McNeil, Craig L.; Beatty, Cory; DeGrandpre, Michael D.; Blomquist, Byron; Huebert, Barry; Cluderay, John; Zemmelink, Hendrik J.; Coles, David; Hsueh, Ping-Chang; Leighton, Timothy G.; Dacey, John W. H.; Drennan, William M.; Rebozo, Mike; Sahlee, Erik; Gabriele, Joseph; Hill, Martin K.; Horn, Matt; De Leeuw, Gerrit; Neill, Craig; Skjelvan, Ingunn; O'Doherty, Simon; Walsh, Roisin; Young, Dickon; Schuster, Ute; Telszewski, Maciej; Slagter, Hans; Ward, Brian; Woolf, David K. (American Meteorological Society, 2009-05)
    As part of the U.K. contribution to the international Surface Ocean–Lower Atmosphere Study, a series of three related projects—DOGEE, SEASAW, and HiWASE—undertook experimental studies of the processes controlling the ...
  • Physical influences on phytoplankton ecology : models and observations 

    Clayton, Sophie A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-06)
    The physical environment in the oceans dictates not only how phytoplankton cells are dispersed and their populations intermingled, but also mediates the supply of nutrients to the surface mixed layer. In this thesis I ...
  • Physical mechanisms for the offshore detachment of the Changjiang Diluted Water in the East China Sea 

    Chen, Changsheng; Xue, Pengfei; Ding, Pingxing; Beardsley, Robert C.; Xu, Qichun; Mao, Xianmou; Gao, Guoping; Qi, Jianhua; Li, Chunyan; Lin, Huichan; Cowles, Geoffrey W.; Shi, Maochong (American Geophysical Union, 2008-02-02)
    Physical mechanisms for the summertime offshore detachment of the Changjiang Diluted Water (CDW) into the East China Sea are examined using the high-resolution, unstructured-grid, Finite-Volume Coastal Ocean Model (FVCOM). ...
  • Physical processes and zooplankton distribution in the Great South Channel : observational and numerical studies 

    Epstein, Ari W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1995-06)
    This thesis addresses the question, "How do small-scale physics and biology combine to produce dense aggregations of certain species of zooplankton in the Great South Channel (GSC) of the Gulf of Maine?" The thesis ...
  • Physical properties of hydrate-bearing sediments 

    Waite, William F.; Santamarina, J. Carlos; Cortes, Douglas D.; Dugan, Brandon; Espinoza, D. N.; Germaine, J.; Jang, J.; Jung, J. W.; Kneafsey, Timothy J.; Shin, H.; Soga, K.; Winters, William J.; Yun, T.-S. (American Geophysical Union, 2009-12-31)
    Methane gas hydrates, crystalline inclusion compounds formed from methane and water, are found in marine continental margin and permafrost sediments worldwide. This article reviews the current understanding of phenomena ...
  • Physical properties of sediment from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope 

    Winters, William J.; Walker, Michael; Hunter, Robert; Collett, Timothy S.; Boswell, Ray M.; Rose, Kelly K.; Waite, William F.; Torres, Marta E.; Patil, Shirish; Dandekar, Abhijit (Elsevier B.V., 2010-01-18)
    This study characterizes cored and logged sedimentary strata from the February 2007 BP Exploration Alaska, Department of Energy, U.S. Geological Survey (BPXA-DOE-USGS) Mount Elbert Gas Hydrate Stratigraphic Test Well on ...
  • Physical properties of sediments from Keathley Canyon and Atwater Valley, JIP Gulf of Mexico gas hydrate drilling program 

    Winters, William J.; Dugan, Brandon; Collett, Timothy S. (Elsevier B.V., 2008-05-18)
    Physical property measurements and consolidation behavior are different between sediments from Atwater Valley and Keathley Canyon in the northern Gulf of Mexico. Void ratio and bulk density of Atwater Valley sediment from ...
  • Physical property changes in hydrate-bearing sediment due to depressurization and subsequent repressurization 

    Waite, William F.; Kneafsey, Timothy J.; Winters, William J.; Mason, D. H. (American Geophysical Union, 2008-07-03)
    Physical property measurements of sediment cores containing natural gas hydrate are typically performed on material exposed, at least briefly, to non-in situ conditions during recovery. To examine the effects of a brief ...
  • Physically constrained maximum likelihood (PCML) mode filtering and its application as a pre-processing method for underwater acoustic communication 

    Papp, Joseph C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-09)
    Mode filtering is most commonly implemented using the sampled mode shape or pseudoinverse algorithms. Buck et al placed these techniques in the context of a broader maximum a posteriori (MAP) framework. However, the MAP ...
  • Physically constrained maximum likelihood mode filtering 

    Papp, Joseph C.; Preisig, James C.; Morozov, Andrey K. (Acoustical Society of America, 2010-04)
    Mode filtering is most commonly implemented using the sampled mode shapes or pseudoinverse algorithms. Buck et al. [J. Acoust. Soc. Am. 103, 1813–1824 (1998)] placed these techniques in the context of a broader maximum a ...
  • Physiological and behavioral diagnostics of nitrogen limitation for the toxic dinoflagellate Alexandrium fundyense 

    Poulton, Nicole J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2000-09)
    One challenge in phytoplankton ecology is to measure species-specific physiological responses to changes in environmental conditions. Of particular importance in this regard are harmful algal bloom (RAB) species such as ...
  • Physiological and developmental responses to temperature by the sea anemone Nematostella vectensis 

    Reitzel, Adam M.; Chu, Tim; Edquist, Sara; Genovese, Caitlyn; Church, Caitlin; Tarrant, Ann M.; Finnerty, John R. (Inter-Research, 2013-06-12)
    Environmental temperature and an organism’s ability to respond to it are critical determinants of the geographic distribution of species. Nematostella vectensis is a burrowing sea anemone that inhabits estuaries along the ...
  • Physiological proteomics of the uncultured endosymbiont of Riftia pachyptila 

    Markert, Stephanie; Arndt, Cordelia; Felbeck, Horst; Becher, Dorte; Sievert, Stefan M.; Hugler, Michael; Albrecht, Dirk; Robidart, Julie; Bench, Shellie; Feldman, Robert A.; Hecker, Michael; Schweder, Thomas (2006-11-14)
    The bacterial endosymbiont of the deep-sea tube worm Riftia pachyptila has never been successfully cultivated outside its host. In the absence of cultivation data we have taken a proteomic approach based on the metagenome ...
  • Physiological studies of phototrophy and heterotrophy in two algae with contrasting nutritional characteristics, Pyrenomonas salina (Cryptophyceae) and Poterioochromonas malhamensis (Chrysophyceae) 

    Lewitus, Alan J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-08)
    The ability of algae to take up dissolved organic compounds is well documented for cultured and field populations yet the physiological mechanisms controlling this behavior are largely unknown. The effects of dissolved ...
  • Physiology and molecular biology of aquatic cyanobacteria 

    Bullerjahn, George S.; Post, Anton F. (Frontiers Media, 2014-07-14)
    Cyanobacteria thrive in every illuminated aquatic environment known, contributing at least 25% of primary productivity worldwide. Given their importance in carbon and nutrient cycles, cyanobacteria are essential geochemical ...
  • The physiology of dormancy and germination in cysts of the marine dinoflagellate Scrippsiella trochoidea 

    Binder, Brian Jeffrey (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1986-02)
    Cysts of Scrippsiella trochoidea are representative of the thick-walled non-motile resting cells produced by many dinoflagellates. Although the influence of cysts on the biology and ecology of dinoflagellates may be ...