Authors
Lucas Girard, Jérôme Weiss, Jean-Marc Molines, Bernard Barnier, Sylvain Bouillon
Publication date
2009/8
Journal
Journal of Geophysical Research: Oceans
Volume
114
Issue
C8
Description
Sea ice drift and deformation from models are evaluated on the basis of statistical and scaling properties. These properties are derived from two observation data sets: the RADARSAT Geophysical Processor System (RGPS) and buoy trajectories from the International Arctic Buoy Program (IABP). Two simulations obtained with the Louvain‐la‐Neuve Ice Model (LIM) coupled to a high‐resolution ocean model and a simulation obtained with the Los Alamos Sea Ice Model (CICE) were analyzed. Model ice drift compares well with observations in terms of large‐scale velocity field and distributions of velocity fluctuations although a significant bias on the mean ice speed is noted. On the other hand, the statistical properties of ice deformation are not well simulated by the models: (1) The distributions of strain rates are incorrect: RGPS distributions of strain rates are power law tailed, i.e., exhibit “wild randomness,” whereas …
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