Extended Data Fig. 10: Larsen D coastal sea-ice variability.
From: Antarctic ice-shelf advance driven by anomalous atmospheric and sea-ice circulation
a, Timeseries showing monthly sea ice concentration (SIC) between 1990 and 1993 when a calving event of uncertain timing occurred (cf. Figure 2). Values represent the average of all cells contained in the red dashed box shown in b. Red lines denote times in which highly anomalous (>2σ), wind-driven coastal sea-ice losses would have rapidly de-buttressed Larsen D’s ice front, prompted enhanced gravitational ice-shelf flow due to increased (oceanward-down) sea-surface slopes and likely initiated calving. In c and d, the position of the ice front as observed on 24th January 1995 is also shown, revealing further retreat of the coastline after January 1993 in response to the observed coastal sea-ice loss shown in a and b and/or the related calving event between December 1992 and January 1993 (d). No other satellite imagery exists between these times. HI denotes Hearst Island; EI, Ewing Island; DI, Dolleman Island; SI, Steele Island.
