Now showing items 356-375 of 4933

  • B content and Si/C ratios from cultured diatoms (Thalassiosira pseudonana and Thalassiosira weissflogii) : relationship to seawater pH and diatom carbon acquisition 

    Mejia, Luz Maria; Isensee, Kirsten; Mendez-Vicente, Ana; Pisonero, Jorge; Shimizu, Nobumichi; Gonzalez, Cristina; Monteleone, Brian D.; Stoll, Heather M. (Elsevier, 2013-06-18)
    Despite the importance of diatoms in regulating climate and the existence of large opal-containing sediments in key air-ocean exchange areas, most geochemical proxy records are based on carbonates. Among them, Boron (B) ...
  • Bacterial group II introns in a deep-sea hydrothermal vent environment 

    Podar, Mircea; Mullineaux, Lauren S.; Huang, Hon-Ren; Perlman, Philip S.; Sogin, Mitchell L. (American Society for Microbiology, 2002-12)
    Group II introns are catalytic RNAs and mobile retrotransposable elements known to be present in the genomes of some nonmarine bacteria and eukaryotic organelles. Here we report the discovery of group II introns in a ...
  • Bacterivory by phototrophic picoplankton and nanoplankton in Arctic waters 

    Sanders, Robert W.; Gast, Rebecca J. (2011-11)
    Mixotrophy, the combination of phototrophy and heterotrophy within the same individual, is widespread in oceanic systems. Yet, neither the presence nor ecological impact of mixotrophs has been identified in an Arctic marine ...
  • Balancing end-to-end budgets of the Georges Bank ecosystem 

    Steele, John H.; Collie, Jeremy S.; Bisagni, James J.; Gifford, Dian J.; Fogarty, Michael J.; Link, Jason S.; Sullivan, B. K.; Sieracki, Michael E.; Beet, Andrew R.; Mountain, David G.; Durbin, Edward G.; Palka, D.; Stockhausen, W. T. (2007-05-09)
    Oceanographic regimes on the continental shelf display a great range in the time scales of physical exchange, biochemical processes and trophic transfers. The close surface-to-seabed physical coupling at intermediate scales ...
  • Ball release experiments on a centrifuge : misalignment between the buoyancy force and the axis of rotation 

    Riemenschneider, Ulrike; Sheremet, Vitalii A. (Cambridge University Press, 2006-09-15)
    Motivated by work on tilted convection (Sheremet, J. Fluid Mech., vol. 506, 2004, p. 217), a set of experiments is presented here using the same set-up of a tilted tank attached to a rotating centrifuge with a 2.5 m arm. ...
  • Barium in twilight zone suspended matter as a potential proxy for particulate organic carbon remineralization : results for the North Pacific 

    Dehairs, Frank; Jacquet, S.; Savoye, Nicolas; Van Mooy, Benjamin A. S.; Buesseler, Ken O.; Bishop, James K. B.; Lamborg, Carl H.; Elskens, Marc; Baeyens, W.; Boyd, Philip W.; Casciotti, Karen L.; Monnin, C. (2008-01-22)
    This study focuses on the fate of exported organic carbon in the twilight zone at two contrasting environments in the North Pacific: the oligotrophic ALOHA site (22°45' N 158°W; Hawaii; studied during June–July 2004) and ...
  • Barnacle larvae in ice : survival, reproduction, and time to post settlement metamorphosis 

    Pineda, Jesus; DiBacco, Claudio; Starczak, Victoria R. (2005)
    Late stage larvae (cyprids) of the barnacle Semibalanus balanoides frequently encounter freezing conditions along the northwest Atlantic coast. S. balanoides cyprids survived for more than 4 weeks embedded in sea ice, and ...
  • The baroclinic adjustment of time-dependent shear flows 

    Poulin, Francis J.; Flierl, Glenn R.; Pedlosky, Joseph (American Meteorological Society, 2010-08)
    Motivated by the fact that time-dependent currents are ubiquitous in the ocean, this work studies the two-layer Phillips model on the beta plane with baroclinic shear flows that are steady, periodic, or aperiodic in time ...
  • Baroclinic flow around planetary islands in a double gyre : a mechanism for cross-gyre flow 

    Pedlosky, Joseph (American Meteorological Society, 2010-05)
    A quasigeostrophic, two-layer model is used to study the baroclinic circulation around a thin, meridionally elongated island. The flow is driven by either buoyancy forcing or wind stress, each of whose structure would ...
  • Baroclinic instability of a meridionally varying basic state 

    Meacham, Stephen P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1984-06)
    Several problems are addressed herein. They are loosely connected by the theme of resonant triad interactions. The main topic is the finite amplitude evolution of weakly unstable, linear eigenmodes in a meridionally ...
  • Baroclinic instability of time-dependent currents 

    Pedlosky, Joseph; Thomson, James M. (Cambridge University Press, 2003-08-19)
    The baroclinic instability of a zonal current on the beta-plane is studied in the context of the two-layer model when the shear of the basic current is a periodic function of time. The basic shear is contained in a zonal ...
  • Baroclinic vortices over a sloping bottom 

    LaCasce, Joseph H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-09)
    Nonlinear quasigeostrophic flows in two layers over a topographic slope are considered. The evolution depends on the size of two parameters which indicate the degree of nonlinearity at depth. The first measures the ...
  • Barotropic Rossby waves radiating from tropical instability waves in the Pacific Ocean 

    Farrar, J. Thomas (American Meteorological Society, 2011-06)
    Tropical instability waves are triggered by instabilities of the equatorial current systems, and their sea level signal, with peak amplitude near 5°N, is one of the most prominent features of the dynamic topography of the ...
  • Barotropic tide in the northeast South China Sea 

    Beardsley, Robert C.; Duda, Timothy F.; Lynch, James F.; Irish, James D.; Ramp, Steven R.; Chiu, Ching-Sang; Tang, Tswen Yung; Yang, Yiing Jiang; Fang, Guohong (IEEE, 2004-10)
    A moored array deployed across the shelf break in the northeast South China Sea during April-May 2001 collected sufficient current and pressure data to allow estimation of the barotropic tidal currents and energy fluxes ...
  • Barotropic tides on the southeast New England shelf : a view from a hybrid data assimilative modeling approach 

    He, Ruoying; Wilkin, John L. (American Geophysical Union, 2006-08-01)
    A high-resolution hybrid data assimilative (DA) modeling system is used to study barotropic tides and tidal dynamics on the southeast New England shelf. In situ observations include tidal harmonics of 5 major tidal ...
  • Basal gnathostomes provide unique insights into the evolution of vitamin B12 binders 

    Lopes-Marques, Monica; Ruivo, Raquel; Delgado, Ines; Wilson, Jonathan M.; Aluru, Neelakanteswar; Castro, L. Filipe C. (Oxford University Press, 2014-12-31)
    The uptake and transport of vitamin B12 (cobalamin; Cbl) in mammals involves a refined system with three evolutionarily related transporters: transcobalamin 1 (Tcn1), transcobalamin 2 (Tcn2), and the gastric intrinsic ...
  • Basalt petrogenesis beneath slow- and ultraslow-spreading Arctic mid-ocean ridges 

    Elkins, Lynne J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-02)
    To explore the ability of melting mafic lithologies to produce alkaline ocean-island basalts (OIB), an experimental study was carried out measuring clinopyroxene (Cpx)- melt and garnet (Gt)-melt partition coefficients ...
  • Baseline hearing abilities and variability in wild beluga whales (Delphinapterus leucas) 

    Castellote, Manuel; Mooney, T. Aran; Quakenbush, Lori; Hobbs, Roderick; Goertz, Caroline; Gaglione, Eric (2014-01)
    While hearing is the primary sensory modality for odontocetes, there are few data addressing variation within a natural population. This work describes the hearing ranges (4-150 kHz) and sensitivities of seven apparently ...
  • Basin-scale inputs of cobalt, iron, and manganese from the Benguela-Angola front to the South Atlantic Ocean 

    Noble, Abigail E.; Lamborg, Carl H.; Ohnemus, Daniel C.; Lam, Phoebe J.; Goepfert, Tyler J.; Measures, Christopher I.; Frame, Caitlin H.; Casciotti, Karen L.; DiTullio, Giacomo R.; Jennings, Joe C.; Saito, Mak A. (Association for the Sciences of Limnology and Oceanography, 2012-07)
    We present full-depth zonal sections of total dissolved cobalt, iron, manganese, and labile cobalt from the South Atlantic Ocean. A basin-scale plume from the African coast appeared to be a major source of dissolved metals ...
  • Basin-scale tidal measurements using acoustic tomography 

    Headrick, Robert H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-09)
    Travel-times of acoustic signals were measured between a bottom-mounted source near Oahu and four bottom-mounted receivers located near Washington, Oregon, and California in 1988 and 1989. This paper discusses the observed ...