Articles | Volume 14, issue 6
The Cryosphere, 14, 1937–1950, 2020
The Cryosphere, 14, 1937–1950, 2020

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 et al.

Related subject area

Discipline: Sea ice | Subject: Remote Sensing
Spring melt pond fraction in the Canadian Arctic Archipelago predicted from RADARSAT-2
Stephen E. L. Howell, Randall K. Scharien, Jack Landy, and Mike Brady
The Cryosphere, 14, 4675–4686,,, 2020
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Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements
Hoyeon Shi, Byung-Ju Sohn, Gorm Dybkjær, Rasmus Tage Tonboe, and Sang-Moo Lee
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Estimating statistical errors in retrievals of ice velocity and deformation parameters from satellite images and buoy arrays
Wolfgang Dierking, Harry L. Stern, and Jennifer K. Hutchings
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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. 
Bai, X., Hu, H., Wang, J., Yu, Y., Cassano, E., and Maslanik, J.: Responses of surface heat flux, sea ice and ocean dynamics in the Chukchi-Beaufort sea to storm passages during winter 2006/2007: A numerical study, Deep.-Sea Res. Pt. I, 102, 101–117,, 2015. 
Bouillon, S. and Rampal, P.: On producing sea ice deformation data sets from SAR-derived sea ice motion, The Cryosphere, 9, 663–673,, 2015. 
Breslow, N. E. and Clayton, D. G.: Approximate inference in generalized linear mixed models, J. Am. Stat. Assoc., 88, 9–25,, 1993. 
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.