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estimating thickness from anide drift forecast model - IP.com disclosure2015-01-05

IP.com Disclosure Number: IPCOM000239937D
Publication Date: 2014-Dec-16
Document File: 2 page(s) / 73K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method for estimating the ice thickness of free drifting floes has been devised. Presently, accurate ice thickness measurements typically require the use of instruments carried in low-altitude aircraft or the use of on-ice measurements – both of which increase personnel exposure during field operations. The method described below estimates ice thickness based on ice drift measurements, wind measurements, and an ice drift forecast model.

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ABSTRACT

A method for estimating the ice thickness of free drifting floes has been devised.  Presently, accurate ice thickness measurements typically require the use of instruments carried in low-altitude aircraft or the use of on-ice measurements – both of which increase personnel exposure during field operations.  The method described below estimates ice thickness based on ice drift measurements, wind measurements, and an ice drift forecast model.

DISCLOSURE

Station keeping of floating drilling vessels in the high-Arctic offshore region during the nominal open water summer season and shoulder seasons will generally involve ice management.  Determining the breakability of ice requires accurate estimates of ice thickness.  Conventional methods for measuring ice thickness typically require the use of instruments carried in low-altitude aircraft or the use of on-ice measurements – both of which increase personnel exposure during field operations.  Thus, a method of estimating ice thickness that mitigates risk to personnel was desired.

The proposed method would serve the purpose of estimating ice thickness with reduced risk to personnel.  This is accomplished by measuring ice drift and wind velocity and using an ice drift forecast model to then determine the ice thickness that best replicates the actual drift path.  The ice drift forecast model has three explicit variables: ice drift, wind speed, and ice thickness.  When any two variables are known, the other variab...