Articles | Volume 14, issue 6
Research article
15 Jun 2020
Research article |  | 15 Jun 2020

Opportunistic evaluation of modelled sea ice drift using passively drifting telemetry collars in Hudson Bay, Canada

Ron R. Togunov, Natasha J. Klappstein, Nicholas J. Lunn, Andrew E. Derocher, and Marie Auger-Méthé

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Discipline: Sea ice | Subject: Remote Sensing
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Cited articles

Auger-Méthé, M., Lewis, M. A., and Derocher, A. E.: Home ranges in moving habitats: Polar bears and sea ice, Ecography, 39, 26–35,, 2016a. 
Auger-Méthé, M., Field, C., Albertsen, C. M., Derocher, A. E., Lewis, M. A., Jonsen, I. D., and Flemming, J. M.: State-space models' dirty little secrets: Even simple linear Gaussian models can have estimation problems, Sci. Rep., 6, 26677,, 2016b. 
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Bouillon, S. and Rampal, P.: On producing sea ice deformation data sets from SAR-derived sea ice motion, The Cryosphere, 9, 663–673,, 2015. 
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Short summary
Sea ice drift affects important geophysical and biological processes in the Arctic. Using the motion of dropped polar bear GPS collars, our study evaluated the accuracy of a popular satellite-based ice drift model in Hudson Bay. We observed that velocity was underestimated, particularly at higher speeds. Direction was unbiased, but it was less precise at lower speeds. These biases should be accounted for in climate and ecological research relying on accurate/absolute drift velocities.