Now showing items 857-876 of 1488

    • Near-surface transport pathways in the north Atlantic Ocean : looking for throughput from the subtropical to the subpolar gyre 

      Rypina, Irina I.; Pratt, Lawrence J.; Lozier, M. Susan (American Meteorological Society, 2011-05)
      Motivated by discrepancies between Eulerian transport estimates and the behavior of Lagrangian surface drifters, near-surface transport pathways and processes in the North Atlantic are studied using a combination of data, ...
    • A new high-resolution unstructured grid finite volume Arctic Ocean model (AO-FVCOM) : an application for tidal studies 

      Chen, Changsheng; Gao, Guoping; Qi, Jianhua; Proshutinsky, Andrey; Beardsley, Robert C.; Kowalik, Zygmunt; Lin, Huichan; Cowles, Geoffrey W. (American Geophysical Union, 2009-08-27)
      A spherical coordinate version of the unstructured grid 3-D FVCOM (finite volume coastal ocean model) has been applied to the Arctic Ocean to simulate tides with a horizontal resolution ranging from 1 km in the near-coastal ...
    • A new mechanism for the generation of quasi-zonal jets in the ocean 

      Wang, Jinbo; Spall, Michael A.; Flierl, Glenn R.; Malanotte-Rizzoli, Paola (American Geophysical Union, 2012-05-16)
      A simple barotropic quasi-geostrophic model is used to demonstrate that instabilities radiated from an unstable eastern boundary current can generate zonal striations in the ocean interior with realistic wavelengths and ...
    • A new parameterization for entrainment in overflows 

      Cenedese, Claudia; Adduce, Claudia (American Meteorological Society, 2010-08)
      Dense overflows entrain surrounding waters at specific locations, for example, sills and constrictions, but also along the descent over the continental slope. The amount of entrainment dictates the final properties of these ...
    • New perspectives on eighteen-degree water formation in the North Atlantic 

      Joyce, Terrence M. (2011-04-08)
      In this report, Eighteen Degree Water (EDW) formation will be discussed, with emphasis on advances in understanding emerging within the past decade. In particular, a recently completed field study of EDW (CLIMODE) is ...
    • Newly discovered deep-branching marine plastid lineages are numerically rare but globally distributed 

      Choi, Chang Jae; Bachy, Charles; Spiro Jaeger, Gualtiero; Poirier, Camille; Sudek, Lisa; Sarma, V. V. S. S.; Mahadevan, Amala; Giovannoni, Stephen J.; Worden, Alexandra Z. (Elsevier, 2017-01-09)
      Ocean surface warming is resulting in an expansion of stratified, low-nutrient environments, a process referred to as ocean desertification. A challenge for assessing the impact of these changes is the lack of robust ...
    • A nonhydrostatic version of FVCOM : 1. Validation experiments 

      Lai, Zhigang; Chen, Changsheng; Cowles, Geoffrey W.; Beardsley, Robert C. (American Geophysical Union, 2010-11-13)
      The unstructured grid finite volume coastal ocean model (FVCOM) system has been expanded to include nonhydrostatic dynamics. This addition uses the factional step method with both split mode explicit and semi-implicit ...
    • A nonhydrostatic version of FVCOM : 2. Mechanistic study of tidally generated nonlinear internal waves in Massachusetts Bay 

      Lai, Zhigang; Chen, Changsheng; Cowles, Geoffrey W.; Beardsley, Robert C. (American Geophysical Union, 2010-12-21)
      The generation, propagation, and dissipation processes of large-amplitude nonlinear internal waves in Massachusetts Bay during the stratified season were examined using the nonhydrostatic Finite-Volume Coastal Ocean Model ...
    • Nonlinear adjustment of a localized layer of buoyant, uniform potential vorticity fluid against a vertical wall 

      Helfrich, Karl R. (2006-01-29)
      The nonlinear evolution of a localized layer of buoyant, uniform potential vorticity fluid of uniform depth H, width w0 and length L released adjacent to a wall in a rotating system is studied using reduced-gravity ...
    • Nonlinear disintegration of the internal tide 

      Helfrich, Karl R.; Grimshaw, Roger H. J. (American Meteorological Society, 2008-03)
      The disintegration of a first-mode internal tide into shorter solitary-like waves is considered. Since observations frequently show both tides and waves with amplitudes beyond the restrictions of weakly nonlinear theory, ...
    • The nonlinear downstream development of baroclinic instability 

      Pedlosky, Joseph (Sears Foundation for Marine Research, 2011-07-01)
      The downstream development in both space and time of baroclinic instability is studied in a nonlinear channel model on the f-plane. The model allows the development of the instability to be expressed on space and time ...
    • The nonlinear dynamics of time-dependent subcritical baroclinic currents 

      Flierl, Glenn R.; Pedlosky, Joseph (American Meteorological Society, 2007-04)
      The nonlinear dynamics of baroclinically unstable waves in a time-dependent zonal shear flow is considered in the framework of the two-layer Phillips model on the beta plane. In most cases considered in this study the ...
    • Nonlinear interactions among standing surface and internal gravity waves 

      Joyce, Terrence M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1972-06)
      A laboratory study has been undertaken to measure the momentum transfer from surface to internal gravity waves in a nonlinear, resonant interaction. The interacting waves form triads for which σ1s - σ2s ± σI = 0 and κ1s - ...
    • Nonlinear internal waves over New Jersey's continental shelf 

      Shroyer, Emily L.; Moum, James N.; Nash, Jonathan D. (American Geophysical Union, 2011-03-23)
      Ship and mooring data collected off the coast of New Jersey are used to describe the nonlinear internal wave (NLIW) field and the background oceanographic conditions that formed the waveguide on the shelf. The subinertial, ...
    • Nonlinear response of iceberg side melting to ocean currents 

      FitzMaurice, Anna; Cenedese, Claudia; Straneo, Fiamma (John Wiley & Sons, 2017-06-12)
      Icebergs calving into Greenlandic Fjords frequently experience strongly sheared flows over their draft, but the impact of this flow past the iceberg is not fully captured by existing parameterizations. We present a series ...
    • Nonlinear stratified spindown over a slope 

      Benthuysen, Jessica A.; Thomas, Leif N. (Cambridge University Press, 2013-06-05)
      Nonlinear stratified spindown of an along-isobath current over an insulated slope is shown to develop asymmetries in the vertical circulation and vertical relative vorticity field. During spindown, cyclonic vorticity is ...
    • Nonlocal transport due to Langmuir circulation in a coastal ocean 

      Kukulka, Tobias; Plueddemann, Albert J.; Sullivan, Peter P. (American Geophysical Union, 2012-12-11)
      We present observations and simulations of large-scale velocity structures associated with turbulent boundary layer dynamics of a coastal ocean. Special purpose acoustic Doppler current profiler measurements revealed that ...
    • North Atlantic climate variability in coupled models and data 

      Kravtsov, Sergey K.; Dewar, William K.; Ghil, M.; Berloff, Pavel S.; McWilliams, James C. (Copernicus Publications on behalf of the European Geosciences Union, 2008-01-18)
      We show that the observed zonally averaged jet in the Northern Hemisphere atmosphere exhibits two spatial patterns with broadband variability in the decadal and inter-decadal range; these patterns are consistent with an ...
    • North Atlantic salinity as a predictor of Sahel rainfall 

      Li, Laifang; Schmitt, Raymond W.; Ummenhofer, Caroline C.; Karnauskas, Kristopher B. (American Association for the Advancement of Science., 2016-05-06)
      Water evaporating from the ocean sustains precipitation on land. This ocean-to-land moisture transport leaves an imprint on sea surface salinity (SSS). Thus, the question arises of whether variations in SSS can provide ...
    • North Brazil Current Rings Experiment : mooring S1 data report, November 1998 - June 2000 

      Glickson, Deborah A.; Fratantoni, David M. (Woods Hole Oceanographic Institution, 2001-06)
      Nineteen months of temperature and salinity data were recovered from North Brazil Current (NBC) Rings Experiment Mooring S1. The mooring, located east of Barbados at 13º 00’N, 57º 53’W between November 1998 and June 2000, ...