Now showing items 1-16 of 16

  • Arctic Ocean warming contributes to reduced polar ice cap 

    Polyakov, Igor V.; Timokhov, Leonid A.; Alexeev, Vladimir A.; Bacon, Sheldon; Dmitrenko, Igor A.; Fortier, Louis; Frolov, Ivan E.; Gascard, Jean-Claude; Hansen, Edmond; Ivanov, Vladimir V.; Laxon, Seymour W.; Mauritzen, Cecilie; Perovich, Donald K.; Shimada, Koji; Simmons, Harper L.; Sokolov, Vladimir T.; Steele, Michael; Toole, John M. (American Meteorological Society, 2010-12)
    Analysis of modern and historical observations demonstrates that the temperature of the intermediate-depth (150–900 m) Atlantic water (AW) of the Arctic Ocean has increased in recent decades. The AW warming has been uneven ...
  • Automated ice-tethered profilers for seawater observations under pack ice in all seasons 

    Krishfield, Richard A.; Toole, John M.; Proshutinsky, Andrey; Timmermans, Mary-Louise (American Meteorological Society, 2008-11)
    An automated, easily deployed Ice-Tethered Profiler (ITP) instrument system, developed for deployment on perennial sea ice in the polar oceans to measure changes in upper ocean water properties in all seasons, is described, ...
  • Circulation and water mass transformation in a model of the Chukchi Sea 

    Spall, Michael A. (American Geophysical Union, 2007-05-11)
    The circulation and water mass transformation in a regional ocean-ice model of the Chukchi Sea are discussed. The model has horizontal resolution of O(4 km), is forced by fluxes derived from daily NCEP reanalysis fields, ...
  • The Community Climate System Model version 4 

    Gent, Peter R.; Danabasoglu, Gokhan; Donner, Leo J.; Holland, Marika M.; Hunke, Elizabeth C.; Jayne, Steven R.; Lawrence, David M.; Neale, Richard B.; Rasch, Philip J.; Vertenstein, Mariana; Worley, Patrick H.; Yang, Zong-Liang; Zhang, Minghua (American Meteorological Society, 2011-10-01)
    The fourth version of the Community Climate System Model (CCSM4) was recently completed and released to the climate community. This paper describes developments to all CCSM components, and documents fully coupled preindustrial ...
  • A conceptual model of an Arctic sea 

    St-Laurent, Pierre; Straneo, Fiamma; Barber, David G. (American Geophysical Union, 2012-06-20)
    We propose a conceptual model for an Arctic sea that is driven by river runoff, atmospheric fluxes, sea ice melt/growth, and winds. The model domain is divided into two areas, the interior and boundary regions, that are ...
  • The East Greenland Coastal Current : structure, variability, and forcing 

    Sutherland, David A.; Pickart, Robert S. (2008-03-12)
    The subtidal circulation of the southeast Greenland shelf is described using a set of high-resolution hydrographic and velocity transects occupied in summer 2004. The main feature is the East Greenland Coastal Current ...
  • Ekman veering, internal waves, and turbulence observed under Arctic sea ice 

    Cole, Sylvia T.; Timmermans, Mary-Louise; Toole, John M.; Krishfield, Richard A.; Thwaites, Fredrik T. (American Meteorological Society, 2014-05)
    The ice–ocean system is investigated on inertial to monthly time scales using winter 2009–10 observations from the first ice-tethered profiler (ITP) equipped with a velocity sensor (ITP-V). Fluctuations in surface winds, ...
  • Estimating sea-ice coverage, draft, and velocity in Marguerite Bay (Antarctica) using a subsurface moored upward-looking acoustic Doppler current profiler (ADCP) 

    Hyatt, Jason; Visbeck, Martin; Beardsley, Robert C.; Owens, W. Brechner (2007-09-14)
    A technique for the analysis of data from a subsurface moored upward-looking acoustic Doppler current profiler (ADCP) to determine ice coverage, draft and velocity is presented and applied to data collected in Marguerite ...
  • Evaluation of Arctic sea ice thickness simulated by Arctic Ocean Model Intercomparison Project models 

    Johnson, Mark; Proshutinsky, Andrey; Aksenov, Yevgeny; Nguyen, An T.; Lindsay, Ron; Haas, Christian; Zhang, Jinlun; Diansky, Nikolay; Kwok, Ron; Maslowski, Wieslaw; Hakkinen, Sirpa M. A.; Ashik, Igor M.; de Cuevas, Beverly (American Geophysical Union, 2012-03-15)
    Six Arctic Ocean Model Intercomparison Project model simulations are compared with estimates of sea ice thickness derived from pan-Arctic satellite freeboard measurements (2004–2008); airborne electromagnetic measurements ...
  • Icebergs and sea ice detected with inverted echo sounders 

    Andres, Magdalena; Silvano, Alessandro; Straneo, Fiamma; Watts, D. Randolph (American Meteorological Society, 2015-05)
    A 1-yr experiment using a pressure-sensor-equipped inverted echo sounder (PIES) was conducted in Sermilik Fjord in southeastern Greenland (66°N, 38°E) from August 2011 to September 2012. Based on these high-latitude data, ...
  • Modeling winter circulation under landfast ice : the interaction of winds with landfast ice 

    Kasper, Jeremy L.; Weingartner, Thomas J. (American Geophysical Union, 2012-04-04)
    Idealized models and a simple vertically averaged vorticity equation illustrate the effects of an upwelling favorable wind and a spatially variable landfast ice cover on the circulation beneath landfast ice. For the case ...
  • On the boundary conditions applied to the sea-ice coupled model 

    Huang, Rui Xin; Jin, Xiangze (American Geophysical Union, 2007-04-06)
    The formulation of suitable boundary conditions at the water-ice interface during ice formation (melting) is an important aspect of the sea-ice coupled model. The transfer of water and salt through the water-ice can be ...
  • Trend and interannual variability in southeast Greenland Sea Ice : impacts on coastal Greenland climate variability 

    Moore, G. W. K.; Straneo, Fiamma; Oltmanns, Marilena (John Wiley & Sons, 2014-12-02)
    We describe the recent occurrence of a region of diminished sea ice cover or “notch” offshore of the Kangerdlugssuaq Fiord, the site of the largest tidewater glacier along Greenland's southeast coast. The notch's location ...
  • What is the fate of the river waters of Hudson Bay? 

    St-Laurent, Pierre; Straneo, Fiamma; Dumais, J.-F.; Barber, David G. (2011-08-16)
    We examine the freshwater balance of Hudson and James bays, two shallow and fresh seas that annually receive 12% of the pan- Arctic river runoff. The analyses use the results from a 3–D sea ice-ocean coupled model with ...
  • Wind, sea ice, inertial oscillations and upper ocean mixing in Marguerite Bay, Western Antarctic Peninsula : observations and modeling 

    Hyatt, Jason (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2006-09)
    Two years of moored oceanographic and automatic weather station data which span the winter ice seasons of 2001-2003 within Marguerite Bay on the western Antarctic Peninsula (wAP) shelf were collected as part of the Southern ...
  • Wintertime convection and frontal interleaving in the Southern Ocean 

    Toole, John M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1980-03)
    The Southern Ocean as defined here is the body of water between the Antarctic Continent and the Antarctic Polar Front, (APF). This ocean is considered important in the global thermodynamic balance of the ocean-atmosphere ...