Results 261 to 270 of about 1,500,614 (305)
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Ice thickness estimation using SAR data and ice thickness history
IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004We introduce an algorithm for sea ice thickness estimation by augmenting the sea ice thickness history derived from the daily digitized ice charts for the Baltic Sea ice. This algorithm is designed for operational use and utilizes the C-band Radarsat-1 data.
Juha Karvonen +2 more
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Effect of Ice Thickness on Ice Forces
Offshore Technology Conference, 1974ABSTRACT Ice forces are the main concern in designing offshore structures such as drilling platforms, translating points, or bridge piers in arctic regions. Even though some results have been obtained by field measurements in recent years, there are still significant gaps in the knowledge of ice forces on structures.
Joachim Schwarz +2 more
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DRILL FOR DETERMINING THICKNESS OF ICE
Canadian Journal of Research, 1947A device is described for quickly drilling through ice to determine its thickness. It consists of an electric heater mounted at the tip of a rod long enough to penetrate to the desired depth. The unit drills a half inch diameter hole at the rate of about two feet per minute.
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1989
Abstract : Prototype Upward Looking Sonar (ULS) instruments that monitor time series of ice draft from oceanographic moorings have been designed, built, tested and deployed in arctic waters. The measured time series recovered from these instruments reveal many geophysically significant, quantitative aspects of the sea ice draft distribution that have ...
Richard E. Moritz, Norbert Untersteiner
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Abstract : Prototype Upward Looking Sonar (ULS) instruments that monitor time series of ice draft from oceanographic moorings have been designed, built, tested and deployed in arctic waters. The measured time series recovered from these instruments reveal many geophysically significant, quantitative aspects of the sea ice draft distribution that have ...
Richard E. Moritz, Norbert Untersteiner
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Thickness of ice on perennially frozen lakes
Nature, 1985The dry valleys of southern Victoria Land, constituting the largest ice-free expanse in the Antarctic, contain numerous lakes whose perennial ice cover is the cause of some unique physical and biological properties. Although the depth, temperature and salinity of the liquid water varies considerably from lake to lake, the thickness of the ice cover is
C P, McKay +3 more
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Measuring Ice Thickness with Cygnss Altimetry
IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018Cyclone Global Navigation Satellite System (CYGNSS) is collecting GPS signals reflected from two high altitude lakes with ice cover during Winter 2017–2018. Coherent reflections occur at the ice/water interface and carrier phase altimetry is used to estimate the draft of the ice cover. Simulated data are created using a forward model. Signal processing
David Mayers, Chris Ruf
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ARCTIC, 1979
This paper examines how sea ice floes of thickness exceeding 6 m can be formed in the Arctic. Such floes have been observed by a Soviet drifting station, by a submarine at the North Pole, and at three sites in the Canadian Arctic Archipelago. The Maykut and Untersteiner model of sea ice growth predicts an equilibrium thickness of 3 m under normal ...
E.R. Walker, Peter Wadhams
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This paper examines how sea ice floes of thickness exceeding 6 m can be formed in the Arctic. Such floes have been observed by a Soviet drifting station, by a submarine at the North Pole, and at three sites in the Canadian Arctic Archipelago. The Maykut and Untersteiner model of sea ice growth predicts an equilibrium thickness of 3 m under normal ...
E.R. Walker, Peter Wadhams
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Estimating the thickness of sea ice
Journal of Geophysical Research: Oceans, 1989Sea ice freeboard, thickness, and snow depth were measured from a series of closely spaced (5 to 10 m) drill hole sites from five free‐floating multiyear ice floes in the Beaufort Sea during the spring of 1986 and 1987. A regression of ice thickness on ice draft was performed on the data from each floe and for the combined data set.
Robert H. Bourke, Robert G. Paquette
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Improvements in Ice Thickness Measurements Techniques in Ice Environment
SPE Annual Caspian Technical Conference, 2020Abstract Today, the Oil&Gas industry is seeking for new technologies to reduce the cost of projects and work for profit in period for low price natural hydrocarbons on stock market. Present paper is representing the use of mobile ice thickness radar antenna to measure the profile of ice in a real-time mode. This technique was for the
Aruzhan Abzalkyzy Tlepkaziyeva +1 more
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