Fig. 2: Flat-surface elevations and slopes.
From: Extensive fluvial surfaces at the East Antarctic margin have modulated ice-sheet evolution
a, In situ bed elevations of the 31 flat surfaces mapped around the EAIS margin (limits marked in white). Bed elevations were extracted from RES profiles and filtered to remove points that deviate from the local mode by at least ±50 m (that is, valleys or inselbergs). b, Rebounded bed elevations of the flat surfaces. Rebounded elevations were computed by adding the in situ elevations to the total isostatic response to the complete removal of the EAIS27. All elevations are relative to present-day global mean sea level (the EIGEN-6C4 geoid). Vectors indicate the dip direction of the surfaces, with vector lengths proportional to the dip angle. Blue line marks the −1,000 m bathymetric contour4, indicating the position of the continental shelf edge. Insets show the corresponding frequency distributions of elevation (that is, hypsometries). Purple stars mark the surface outcrops in the Bunger Hills and Vestfold Hills. Red line in panel a shows 16 RES profile segments used to construct a near-continuous profile around the EAIS margin.
