Firn aquifer
WebOct 29, 2024 · Firn aquifers are located where there is sufficient pore space volume in the firn column for meltwater to be stored and high accumulation, which provides insulation … WebSep 1, 2015 · To look at the firn and water thermal properties we also installed a string of 50 temperature sensors from the surface to the top of the aquifer, within the aquifer, and …
Firn aquifer
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WebResearch: Firn aquifer drainage. The flow rate of ice off of Greenland and into the ocean affects sea levels. Ice flow is sensitive to meltwater that travels underneath the glacier. Where and when that water reaches the bed shape the water network under the glacier. We use a computer model to analyze how a newly discovered meltwater source in ... WebJul 14, 2024 · These water reservoirs, named firn aquifers, are a peculiar feature with potentially widespread impacts on ice sheet temperature, hydrology, and contribution to …
WebApr 30, 2024 · Rather, we expect firn aquifers to remain perched above existing pore space, isolating an amount of firn capacity that is set by the firn framework and not by meltwater availability. Indeed, Montgomery and others ( Reference Montgomery 2024 ) suggested that a firn aquifer floor formed well above expected pore close-off conditions … WebPerennial water storage in firn aquifers has been observed within the lower percolation zone of the southeast Greenland ice sheet. Spatially 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 elevation, shear …
WebSeveral authors have proposed the existence of firn aquifers on Antarctic ice shelves (e.g., [4,17]), however little is known about their distribution, formation, extension and role in ice shelf mechanics.In this study we present the discovery of fully saturated firn on the Müller Ice Shelf, which leads us towards the conclusion of at least one large firn aquifer or … WebMar 22, 2024 · Mapping the spatial extent of recently identified englacial hydrological features (i.e., ice slabs and perennial firn aquifers) formed by meters-thick water …
WebIn this study we present the discovery of saturated firn at three drill sites distributed across the Müller ice shelf (67º 14"S; 66º52"W) (one near the front and two in the central region …
WebRecent projects include the impact of a granular proglacial ice mélange on tidewater glacier calving, the influence of perennial firn aquifers on tidewater glacier dynamics, and the relationship between cascading natural hazards (drought, wildfire, precipitation events, landslides) and climate change. hank grill obituaryWebIf 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 ... hank gunyon wrestlerWebOct 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 … hank green video of cellWebApr 29, 2024 · Firn aquifer at approximately 20 m below the snow surface was detected from the NASA OIB campaign on 18 April 2011. The spatial ranges of AB and CD are represented in Figure 1 . hank gunfightWebSep 28, 2024 · Firn aquifers have been discovered across regions of the Greenland ice sheet with high snow accumulation and melt rates, but the processes and rates that … hank guntherWeb29 perennial firn aquifer represents a new glacier facies to be considered in future ice sheet mass 30 and energy budget calculations. 31 The mass of liquid or refrozen meltwater that could be stored in firn pore space throughout 32 the percolation zone of the entire ice sheet is estimated to be between 322 and 1,289 Gt4. In the hank hair pieceWebOct 29, 2024 · The average firn density above the aquifer was 650 kg m −3 and within the aquifer was 850 kg m −3 (Figure 2a). Two shallower firn cores were collected 1 m away from the deepest firn core and show small-scale spatial variability in density above the aquifer with average densities of 627 and 669 kg m −3 (Figure S2 ), which agree within 9 ... hank hall colliers