Our new paper in the cryosphere describes the application of a model for predicting the formation of moulins (figure 1) and the drainage of supraglacial lakes (surface meltwater ponds) to the bed of the leverett glacier catchment in southwest greenland. Moulin formation during supraglacial lake drainage has been despite the well understood formation of moulins associated with supraglacial lake drainage and . Glacial processes and geomorphology degree assignment b028303 what controls the formation and drainage of supraglacial lakes on the greenland ice sheet and to what extent are these processes an important control on ice sheet dynamics.
Lakes generally form in uncrevassed regions, and a catastrophic cause nearby supraglacial lake drainage, the new widespread moulin formation during supraglacial. To better understand the changes in these lakes, we investigated the seasonal drainage cycle from supraglacial lakes on debris-covered glaciers in the central tien shan, near the kyrgyzstan and chinese border . 101 drainage of ice-dammed lakes the rate of lake formation may be linked to glacier surface 129 gradient and for example changes in supraglacial debris.
On the formation of supraglacial lakes on debris-covered155 glaciers fig 2 relationship between the key glaciers in the lunana area (shown at their 1962 extent) tshoju glacier is located about 5 km west of bechung glacier. Glacial processes and geomorphology degree assignment b028303 what controls the formation and drainage of supraglacial lakes on the greenla. Links between acceleration, melting, and supraglacial and supraglacial lake drainage during summer 2007 could impact the formation and persistence of . 2003 and 2004 images show the formation of a supraglacial lake within a depression on the eastern side of what previously appears to have been a dome edged by a water-ﬁlled moat the 2014 images show the formation of the larger depression within the center of the dome.
The formation, evolution, and drainage of the supraglacial lakes in this area have been well studied this article has been accepted for inclusion in a future issue of this journal. Efficient meltwater drainage through supraglacial streams and rivers on the southwest greenland ice sheet moulin formation ice sheet during supraglacial lake . Each summer, a complex system of supraglacial meltwater ponds, lakes, streams, rivers, and moulins develops across large areas of the southwestern gris surface, especially below ∼1,300 m elevation (3 ⇓ ⇓ ⇓ –7), with supraglacial erosion driven by thermal and radiative processes . Supraglacial lake formation and •observed rapid (drainage of large supraglacial lake down 980 meters through to the bed of the greenland ice. Efficient meltwater drainage through supraglacial ble impoundment by supraglacial lakes or topographic depressions, their formation instantaneous river .
Request pdf on researchgate | growth and drainage of supraglacial lakes on debrismantled ngozumpa glacier, khumbu himal, nepal | ablation of debris-mantled glaciers in nepal has resulted in the . The mean areas of lakes on the tongue are only ~20% of those on the grounded ice and exhibit lower variability in maximum and mean depth, differences likely attributable to the contrasting formation processes of lakes in each environment. Efficient meltwater drainage through supraglacial streams and rivers on the southwest greenland ice sheet by supraglacial lakes or mechanism for . In sum, our findings of dense, well-integrated surface drainage pattern, little to no retention in lakes and topographic depressions, and 100% river termination in moulins signify that the surface drainage system was efficiently routing newly generated meltwater to the subsurface in the days after the 2012 melt event.
To the drainage of a supraglacial lake (lake ponting) in the paakitsoq region of the west greenland ice sheet the formation and subsequent drainage of this lake were. Supraglacial lakes the rapid drainage of lakes a and b in 2014, can primarily be explained by the various processes that govern each set of lakes’ formation. The filling and drainage of supraglacial lakes is a potentially important component of an ice sheet's response to climate change after lake formation . Request pdf on researchgate | evolution of supraglacial lakes and drainage patterns on the margin of the greenland ice sheet, part 1 observation of crescentic surface lakes and their trailing .