Fig. 6: Potential historical snowfall droughts.
From: Sea level rise from West Antarctic mass loss significantly modified by large snowfall anomalies
a Normalised RACMO2.3p2 surface mass balance (SMB; solid black line) and normalised snow accumulation from 23 ice cores (grey lines; locations in Supplementary Fig. 9) and a West Antarctic Ice-Sheet composite49 (dashed black line). b Normalised RACMO2.3p2 cumulative precipitation anomaly relative to the 1979–2008 mean, with individual basins (grey lines) and the total Amundsen Sea Embayment (blue line) shown. c Amundsen Sea Low (ASL) relative central pressure (black line) and centre of longitude60, 107 (grey line). d Detrended 20th Century ASL index80, where a negative index corresponds to a deeper ASL. e Timeseries of the Oceanic Niño Index (ONI; blue and red shading), the Southern Annular Mode (SAM; thick black line), and the Interdecadal Pacific Oscillation Tripole Index (IPOTPI; blue line). Red and pink shading in all panels indicates periods of snowfall drought, based on RACMO2.3p2 SMB and ice core snow accumulation timeseries, respectively (Methods).
