Results 211 to 220 of about 43,979 (259)
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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,
M. Hopkins
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The effects of individual ridging events on the ice thickness distribution in the Arctic ice pack
Cold Regions Science and Technology, 1996Abstract The sea ice thickness distribution in the polar oceans evolves in response to both dynamic and thermodynamic forcing. The variable thickness of the ice cover is created by deformation, that simultaneously causes formation of thick ice through ridge building and thin ice through lead creation.
M. Hopkins
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Bio-physical oceanographic interactions at the edge of the Arctic ice pack
Journal of Marine Systems, 1991Abstract About 7% of the world ocean is subject to the seasonal advance and retreat of sea ice. Physical processes at ice edges, interacting with biological phenomena, have been observed to promote phytoplankton blooms in both the Arctic (e.g., Bering and Greenland Seas) and the Antarctic.
H. J. Niebauer
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Tracking Arctic Ice: An Inexpensive Sensor Package Gets Data Back Despite Harsh Conditions
IEEE spectrum, 2022Every winter, sea ice grows in the Arctic Ocean, radiating out from the dense ice pack surrounding the North Pole to a ragged edge, beyond which icebergs float freely.
J. Rabault
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The Cryosphere, 2023
. Sea-ice ridges constitute a large fraction of the total Arctic sea-ice area (up to 40 %–50 %); nevertheless, they are the least studied part of the ice pack. Here we investigate sea-ice melt rates using rare, repeated underwater multibeam sonar surveys
E. Salganik +7 more
semanticscholar +1 more source
. Sea-ice ridges constitute a large fraction of the total Arctic sea-ice area (up to 40 %–50 %); nevertheless, they are the least studied part of the ice pack. Here we investigate sea-ice melt rates using rare, repeated underwater multibeam sonar surveys
E. Salganik +7 more
semanticscholar +1 more source
Acoustically derived ice-fracture velocity in central Arctic pack ice
The Journal of the Acoustical Society of America, 2000Sounds radiated by fractures in Arctic ice (called acoustic events) are used to estimate fracture velocity. Both speed and orientation are obtained by measuring Doppler shifts induced by source motion. Data from the SIMI experiment of 1994 in the central Arctic are used in the frequency window 10 to 350 Hz.
Ira Dyer, Catherine Stamoulis
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Vibrational Motion of Arctic Pack Ice,
1997Abstract : There are many physical mechanisms responsible for vibrations of sea, and they force motions in a very wide band of frequencies from less than 0.01 Hz to greater than 100 Hz. Detailed measurements of the vertical velocity in this frequency band were previously shown to be produced by gravity waves, ridging events and wind turbulence. In this
John Dugan +2 more
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Numerical Simulation of Ship-Ice Interaction in Pack Ice Area Based on CFD-DEM Coupling Method
Volume 6: Polar and Arctic Sciences and Technology, 2022Global warming has caused significant changes in the environment of the Arctic. Due to the shipping economy and efficiency, the number of ships sailing in the Arctic region has been increasing recently.
Ming-song Zou +3 more
semanticscholar +1 more source
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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HF radar observations of Arctic pack-ice breakup
IEEE Journal of Oceanic Engineering, 1986This paper describes the first reported high-resolution remote measurements of sea-ice velocities during the summer Arctic pack-ice breakup, made with a high-frequency (HF) radar system (CODAR, for Coastal Ocean Dynamics Applications Radar) located on Cross Island, Alaska. Each 36-min observation also gives the positions of the ice edge, the moving ice,
B. Lipa, R. Crissman, D. Barrick
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