Articles | Volume 14, issue 4
The Cryosphere, 14, 1289–1310, 2020
The Cryosphere, 14, 1289–1310, 2020

Research article 21 Apr 2020

Research article | 21 Apr 2020

Accuracy and inter-analyst agreement of visually estimated sea ice concentrations in Canadian Ice Service ice charts using single-polarization RADARSAT-2

Angela Cheng et al.

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Cited articles

Belchansky, G. I. and Douglas, D. C.: Seasonal comparisons of sea ice concentration estimates derived from SSM/I, OKEAN, and RADARSAT data, Remote Sens. Environ., 81, 67–81,, 2002. a
Canadian Ice Service: Manual of Ice (MANICE), available at:, last access: 31 October 2019. a
Clausi, D. A., Qin, A. K., Chowdhury, M. S., Yu, P., and Maillard, P.: MAGIC: MAp-Guided Ice Classification System, Can. J. Remote Sens., 36, S13–S25,, 2010. a
Dedrick, K., Partington, K., Woert, M. V., Bertoia, C., and Benner, D.: U.S. National/Naval Ice Center Digital Sea Ice Data and Climatology, Can. J. Remote Sens., 27, 457–475,, 2001. a
Hallgren, K. A.: Computing Inter-Rater Reliability for Observational Data: An Overview and Tutorial, Tutorials in quantitative methods for psychology, 8, 23–34, 2012. a
Short summary
Sea ice charts by the Canadian Ice Service (CIS) contain visually estimated ice concentration produced by analysts. The accuracy of manually derived ice concentrations is not well understood. The subsequent uncertainty of ice charts results in downstream uncertainties for ice charts users, such as models and climatology studies, and when used as a verification source for automated sea ice classifiers. This study quantifies the level of accuracy and inter-analyst agreement for ice charts by CIS.