Ancient pre-glacial erosion surfaces preserved beneath the West Antarctic Ice Sheet Earth Surface Dynamics DOI 10.5194/esurf-3-139-2015 16 February 2015 We use ice penetrating radar data to identify a laterally continuous, gently sloping topographic block, comprising two surfaces separated by a distinct break in slope, preserved beneath the Institute and Möller Ice Streams, West Antarctica. We interpret these features as extensive erosion surfaces, showing that ancient (pre-glacial) surfaces can be preserved at low elevations beneath ice sheets. Different erosion regimes (e.g. fluvial and marine) may have formed these surfaces. Read more
A reduced-complexity model for river delta formation – Part 1: Modeling deltas with channel dynamics Earth Surface Dynamics DOI 10.5194/esurf-3-67-2015 28 January 2015 In this work we present DeltaRCM, a reduced-complexity model for river delta formation. It is a rule-based cellular morphodynamic model, in contrast to reductionist models based on detailed computational fluid dynamics. DeltaRCM is able to resolve channel dynamics, and to produce stratigraphy. We also explain the meaning of complexity reduction, especially what are the essential processes to be included in modeling deltas. Read more
