Seminar in Statistics “Estimating deformation of polar ice”

December 7th, 2017 by Diana Unander Nordle

The department of statistics would like to invite you to the Seminar in Statistics that will be held at their department on December 12th. The presentation under title “Estimating deformation of polar ice” will be given by Professor Aila Särkkä from Chalmers University of Technology. Seminar starts at 14:00 in room K2084V. No sign-up is required.

 

Abstract:

Analysis of deep polar ice cores has become an important tool for deriving climate information from the past. Interpretation of ice core records requires an accurate dating of the ice. The recent dating relies on models where the key element is the simulation of the individual history of ice deformation for each specific core site. We present a two-stage method for the estimation of the deformation history in polar ice using the measured anisotropy of air inclusions from deep ice cores. First, we fit ellipsoids to the pattern of point-to-point distance vectors to estimate the direction of anisotropy. Then, we estimate the scale of anisotropy by identifying the back-transformation resulting in the most isotropic pattern. Finally, the method is applied to estimate the compression in polar ice air bubble patterns.

For more information please contact: Jolanta Pielaszkiewicz, jolanta.pielaszkiewicz@lnu.se

Diana Unander Nordle

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