Results 301 to 310 of about 37,305 (333)
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Pack-ice studies in the Arctic Ocean
Journal of Geophysical Research, 1959The annual stratification of pack ice has been examined. Summer layers are formed either by arrested growth or by thin layers of fresh-water ice. The crystal structure and the salt content of the ice reflect the seasonal cycle. During the growth of ice a pronounced orientation of crystalline structure develops; it is determined by vertical as well as ...
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Near-Field Ice Management Tactics for Floating Drilling in Arctic Pack Ice
Arctic Technology Conference, 2016Abstract In order to be economically viable, Arctic floating drilling in high concentration pack ice requires very high confidence that ice interaction does not lead to costly, unanticipated emergency disconnections of the rig from the well.
Jed Hamilton +6 more
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Underwater Backscattering Strengths of Arctic Pack Ice
The Journal of the Acoustical Society of America, 1964The backscattering strengths under Arctic sea ice for octave bands between 12 cps and 4 kc/sec were measured, using explosive sound sources. The measurements were made from a camp established in April 1962 on broken and pressure-packed one-year ice over the Canada Deep.
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Observations of internal gravity waves under the Arctic pack ice
Journal of Geophysical Research: Oceans, 1987Internal gravity waves measured under the Arctic pack ice were strikingly different from measurements at lower latitudes. The total wave energy, integrated over the internal wave frequency band, was lower by a factor of 0.03–0.07, and the spectral slope at high frequency was nearly −1 in contrast to the − 2 observed at lower latitudes.
Murray D. Levine +2 more
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Airborne laser profiling of the arctic pack ice
Remote Sensing of Environment, 1971Abstract Since 1964, airborne experiments over the Arctic pack ice have been conducted, on an opportunity basis, to test and evaluate the usefulness of various remote sensing systems for mapping and measuring sea ice conditions and features. This paper describes the results of an analysis of laser terrain profile data obtained with coincident ...
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Upwelling: Oceanic Structure at the Edge of the Arctic Ice Pack in Winter
Science, 1979Observations taken on an expedition into the Arctic Ocean north of Spitsbergen indicated the existence of a region of wind-driven upwelling along the edge of the ice pack. Models underestimate the 12-kilometer width of the upwelling region.
J R, Buckley +4 more
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Seasonal dynamics of sub-ice fauna below pack ice in the Arctic (Fram Strait)
Deep Sea Research Part I: Oceanographic Research Papers, 2006Abstract Pronounced seasonality is a characteristic feature of polar ecosystems, but seasonal studies in the high-Arctic pack-ice zone are still scarce because of logistical constraints. During six expeditions (1994–2003) to the Fram Strait area between Greenland and Svalbard in winter, spring, early summer, late summer and autumn, the sub-ice ...
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The Effect of Tensile Strength in the Arctic Ice Pack
2001The ice pack covering northern seas is composed of an aggregate of thick ridged and rafted ice, undeformed ice, and open water. Existing ice-ocean models of the Arctic ice pack are large-scale continuum models that use a plastic yield surface to characterize the constitutive behavior of the pack. An alternative approach, which captures far more detail,
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Plastic pollution in the Arctic
Nature Reviews Earth & Environment, 2022Melanie Bergmann +2 more
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Permafrost carbon emissions in a changing Arctic
Nature Reviews Earth & Environment, 2022Kimberley R Miner +2 more
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