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— In this paper, we will review the results of several studies of significance to the question of future shipping conditions the Canada's Northwest Passage. As will be shown, these studies raise significant questions around the estimation of the impacts of predicted lighter ice seasons from Global Climate Models and introduce further plausible scenarios(More)
During the International Polar Year (IPY), acoustic recorders were deployed on oceanographic moorings in Fram Strait and on the Chukchi Plateau, representing the first coordinated year-round sampling of underwater acoustic habitats at two sites in the High Arctic. Examination of species-specific marine mammal calls recorded from autumn 2008–2009 revealed(More)
Scientific and engineering studies in polar and marginal ice zones require detailed information on sea ice thickness and topography. Until recently, vertical ice dimension data have been largely inferred from aerial and satellite remote-sensing sensors. The capabilities of these sensors are still very limited for establishing accurate ice thicknesses and do(More)
Background A two-year program of ice keel depth and ice velocity m easurements was conducted offshore of Sakhalin Island during the winters of 1996-97 and 1997-98. The project was part of a Joint Industry Project for Sakhalin Energy Investment Company Ltd. (SE on behalf of the Sakhalin II Consortium) and Exxon Neftegas Ltd (ENL on behalf of the Sakhalin I(More)
Temperature, salinity, and direct velocity observations from northern Baffin Bay are presented from a summer 2003 survey. The data reveal interactions between fresh and cold Arctic waters advected southward along Baffin Island and salty and warm Atlantic waters advected northward along western Greenland. Geostrophic currents estimated from hydrography are(More)
A recently commercialized sensor, the In Situ Ultraviolet Spectrophotometer (ISUS), can determine seawater nitrate concentrations rapidly. Procedures for incorporating ISUS data within routine conductivity, temperature, and depth (CTD) profiling studies have not been described. Using a CTD system with an ISUS, vertical hydrographic profiles with nutrient(More)
The Davis Strait project employs a system of long-­‐term moorings, annual (autumn) hydrographic sections and autonomous gliders to quantify exchanges between the Arctic and Subarctic North Atlantic through the Canadian Arctic Archipelago (CAA). The measurement program began in September, 2004 and extends through October, 2015 under the current support. The(More)
Forty two sites on the Alaskan Beaufort Sea shelf break were sampled by helicopter in April 2003 for hydrographic parameters and nutrients. Mesoscale maps delineated two eddies and the Beaufort shelf break current. Higher-salinity nutrient-rich waters upwelled onto the shelf, and the depth of the main pycnocline shoaled to <22 m. A plume of 31.40-31.80(More)
Upward-looking sonar (ULS) is a primary source of data for measurements of ice thickness. Self-contained units now have the data capacity and accuracy/resolution sufficient for unattended operation over periods of months to years. Recent technological advances have now led to the next generation of ice-profiling sonar (IPS), incorporating much expanded(More)
NOTICE from NOAA Mention of a commercial company or product does not constitute an endorsement by NOAA/OAR. Use of information from this publication concerning proprietary products or the tests of such products for publicity or advertising purposes is not authorized. Any opinions, findings, and conclusions or recommendations expressed in this material are(More)