6.1. Conceptual Model
Figure 6 attempts a schematic, integrated model of WAIS, incorporating potential sources and processes, e.g.: fTeezing-on, responsible for the exchange of mineral and organic debris at the ice-sheet ice-sediment interfaces and throughout different Antarctic settings, i.e.: atmosphere, cryosphere, land, and sea. The interior ice reservoir below the ice divide is the portion of the ice sheet coupled with its bed. The ice slides over its bed from the onset region towards the ice shelf (open arrows). The fast-moving glaciers, i.e.: ice streams A-F, drain the interior ice flowing between regions of relatively stagnant ice (ice domes) and penetrate the RIS. The lubricating till lies beneath the ice streams and the graben system (or the East Antarctic Craton System), which is filled by sediments. Basal melting at the ice/sub-ice and gravitational transport would allow sinking of windblown materials (atmospheric sources) throughout the ice caps in an open rather than closed-system. Entrainment of material (rock flour and ancient marine sediment) from subglacial systems and links with atmosphere and coastal setting are also shown by different types of arrows.
Was this article helpful?