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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)
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)
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)
This note has been prepared in response to questions and comments that have arisen since the publication of the Arctic Climate Impact Assessment overview document – " Impacts of a Warming Arctic ". It is intended to provide clarity regarding some aspects relative to the material from Chapter 2 Arctic Climate-Past and Present that will appear in full with(More)
The past decade has seen a remarkable evolution of sea-floor-based ice-draft profiling capabilities. Efforts have progressed from an original Beaufort Sea deployment of a single upward-looking acoustic echo sounder to the almost routine present-day positionings of special-purpose profiler units which operate in conjunction with adjacent current profiling(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)