Sea ice deformation before, during, and after the extreme blizzard event of March 7–9, 2017. Sea ice deformation parameters shown are (top to bottom) sea ice divergence, vorticity, shearing deformation rate, and normal deformation rate. Please see the text for more details on the determination of these parameters. DOI: https://doi.org/10.1525/elementa.2020.00128.f18