Fig. 5
From: Rapid iceberg calving following removal of tightly packed pro-glacial mélange
Mélange thinning. a–c TRI amplitude images, corresponding to times shown in d–f. In a, dashed rectangle R outlines an initial box used to estimate mélange thinning, convex hulls of the evolving box are shown in d–f; red lines are selected profiles to show examples of mélange thinning in i–l, their evolving shapes and locations are shown in b and c. d–f Tidal height subtracted surface elevation of mélange within the selected box, shapes and locations in e and f are estimated based on feature tracking. g Thinning rate from d to e. h Thinning rate from e to f. i–l Surface elevation profiles corresponding to I1–I2, J1–J2, K1–K2, and L1–L2 labeled in b. Black, blue, and red lines correspond to times labeled in i. Dots show observed elevations, lines have tidal height subtracted. Due to >30 m d−1 moving speed of ice in the study area, an Eulerian reference frame is not suitable for mélange thinning estimate, therefore a Lagrangian reference frame is used. m–o Inferred mean thinning rates from measurements separated by 6 days, color from dark blue to dark red corresponding to the first and last image pairs
