3 edition of Geophysical measurements on the Kaskawulsh and Hubbard glaciers, Yukon Territory found in the catalog.
Bibliography: p. 35-36.
|Statement||Arctic Institute of North America|
|Publishers||Arctic Institute of North America|
|The Physical Object|
|Pagination||xvi, 133 p. :|
|Number of Pages||45|
|3||Technical paper (Arctic Institute of North America) ;|
nodata File Size: 7MB.
A meltout curve based on climatological data reflects the sum of three melting processes: surficial melting, melting by lake water, and melting by geothermal heat. 2 Perennial firn aquifer We found unequivocal evidence for a deep perennial firn aquifer on the upper Kaskawulsh Glacier, with excess water in the firn pore space below about 32 m depth. 1 to 1 m in thickness, with higher resolution near the surface. 26 m measured in Core 1.
For each sample, we estimated this by subtracting the mass Geophysical measurements on the Kaskawulsh and Hubbard glaciers volume of the ice to give the firn density in the absence of ice content. 4 years if the seasonal snowpack on top is counted.4, 101,2016.
6 m below the surface for Core 2 i. 0 m, approximately 2 m away from the first. The firn model is coupled with the surface energy balance model, solving for the firn thermodynamic and hydrological evolution at 30 min time steps for the period 1965 to 2019.
Meltwater percolation and refreezing can significantly change the firn density profile and mean density of the accumulation zone of a glacier Gascon et al. Net energy and melt were slightly lower than the long-term average due to low incoming longwave radiation, but overall, 1965 was a typical year. The firn has become denser and more ice-rich since the 1960s and contains a perennial firn aquifer PFAwhich may have developed over the past decade. We neglect rainfall as we do not have a good constraint on how much summer precipitation falls as rain, and this will not be reliably predicted in the climate reanalysis.
In this study two firn cores were retrieved in spring 2018 on Kaskawulsh Glacier, St. Warming firn can result in increased meltwater production and altered firn densification processes. Geodetic mass balance measurements are compromised by climate-change-induced densification changes that are not accounted for when interpreting surface lowering of the accumulation zone Reeh, 2008; Huss, 2013.
5 years, the total measured ice content of 2.
In the model, deep recharge does not occur every summer after the establishment of a temperate firn column; the summer melt still needs to break through the winter cold layer, which typically extends to 6—7 m depth Fig.
Meltwater retention as porewater or refrozen ice will delay surface run-off, dependent on the water storage characteristics of firn e.
5 and 6 should be seen as just one scenario, corresponding to our best estimate of the parameter settings.
The largest ice layer in Core 1 was 22 cm thick, found at 14.
The accumulation zone of Kaskawulsh Glacier is estimated to have experienced a minimum of 0.