WebFirn is the intermediate stage between snow and glacial ice, which constitutes the upper 40–120 m of the accumulation zone of ice sheets. Within the firn a vast network of … WebSpatially distributed seismic and radar observations, made ~50 km upstream of the Helheim Glacier terminus, reveal spatial variations of seismic velocity within a firn aquifer. From 1.65 to 1.8 km ...
NASA study identifies new pathway for Greenland meltwater to …
WebIf firn aquifers drain irregularly in time, or continuously in time, or even if they drain in sync with the melt season, we’re finding that they have a substantial effect on the subglacial hydrologic system downstream. Model domain for GlaDS under an idealized Greenland outlet glacier (panel c) downstream of a firn aquifer (green). From ... WebOct 23, 2024 · 1 Introduction. Across the percolation zone of the southeastern margin of the Greenland Ice Sheet, recent studies have discovered an extensive firn aquifer that stores surface meltwater within the pore spaces of compacting snow/firn throughout the year (Forster et al., 2013; Koenig et al., 2014).This discovery indicated that there are likely … queens kettlesing
Samira Samimi, Ph.D. - Research Scientist - LinkedIn
WebDec 22, 2013 · The aquifer is extensive, covering 27,000 square miles. ... The reservoir is known as a "perennial firn aquifer" because water persists within the firn – layers of snow and ice that don't melt ... WebFeb 7, 2024 · In spring of 2011, a perennial storage of water was observed in the firn of the southeastern Greenland Ice Sheet (GrIS), a region of both high snow accumulation and high melt. This aquifer is created through percolation of surface meltwater downward through the firn, saturating the pore space above the ice-firn transition. The aquifer may play a … WebDuring my current 3-year project, I aim to simulate 3D water flow in the firn aquifer using a computer model (vertical percolation of surface meltwater through the snow to recharge the aquifer and lateral flow downslope … hautaus pirkanmaa