Outburst flooding and the initiation of ice-stream surges in response to climatic cooling: A hypothesis

摘要: Abstract Outburst flooding from subglacial reservoirs and associated surging of ice-streams are caused by processes following climatic cooling that produce ice-shelf grounding on proglacial sills trapping water, according to an hypothesis presented here. Glaciers often advance into water bodies. Cooling may allow formation causing a sill, water. Ice-shelf freeze-on the sill development local reversal in ice–air surface slope over then likely, allowing ice thickening overpressurization. If basal thawing occurs, as is outburst flood surge be triggered. These have been involved Heinrich events, generation Antarctic lakes, meltwater scouring some regions.