Results 81 to 90 of about 291 (173)
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits
Journal of Glaciology, 2018 The morphology of englacial drainage networks and their temporal evolution are poorly characterised, particularly within cold ice masses. At present, direct observations of englacial channels are restricted in both spatial and temporal resolution ...
J. E. KAMINTZIS +7 more
doaj +1 more source
Journal of Glaciology, 2019 We present a workflow to track icebergs in proglacial fjords using oblique time-lapse photos and the Lucas-Kanade optical flow algorithm. We employ the workflow at LeConte Bay, Alaska, where we ran five time-lapse cameras between April 2016 and September
CHRISTIAN KIENHOLZ +9 more
doaj +1 more source
Journal of Glaciology, 2018 Light-absorbing impurities (LAI) can darken snow and ice surfaces, reduce snow/ice albedo and accelerate melt. Efforts to allocate the relative contribution of different LAI to snow/ice albedo reductions have been limited by uncertainties in the optical ...
ANNA DAL FARRA +5 more
doaj +1 more source
Instruments and Methods: Radio-Echo Equipment for Depth Sounding of Temperate Glaciers
, 1980 Radio echo-sounding equipment has been designed, and used for depth sounding on temperate glaciers in Iceland. Two devices have been built. Mark I operates in the frequency band 2 to 5 MHz. The overall range is 100 to 1000 m.
Helgi Björnsson +2 more
core +1 more source
Polarimetric multi-offset radio-echo sounding with a radio frequency-over-fiber ApRES system
Journal of GlaciologyPolarimetric multi-offset radio-echo sounding offers improved constraints on englacial thermal conditions, basal properties and ice crystal orientation compared to standard monostatic observations.
Daniel F. May +9 more
doaj +1 more source
Instruments and Methods: The Measurement of Vertical Strain in Glacier Bore Holes
, 1974 A method to measure the vertical strain in glacier bore holes is described that entails placement of passive markers at varying depths. The position of these markers with respect to a surface reference is measured by an electronic sensor lowered into the
Edward R. LaChapelle, James C. Rogers
core +1 more source
Annals of GlaciologyWe present a high-resolution dataset of over one million icequakes located just upglacier of the grounding line of Rutford Ice Stream, West Antarctica, spanning a 23 day period during January 2019.
Ian R.J. Lee +3 more
doaj +1 more source
, 1965 An easily portably thermal ice drill was designed and constructed, with water vapour being used for melting the ice. A lore hole, 8 m. deep, can be drilled within about 30 min., depending on the ice properties.
F. Howorka
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Instruments and Methods: The USA CRREL Drill for Thermal Coring in Ice
, 1969 The USA CRREL drill is an 80-kg, electrothermal unit designed for continuous coring in temperate or polar ice or snow. The drill melts a hole approximately 16.3 cm in diameter and retrieves a core approximately 12.2 cm in diameter at rates from 1.9 m h−1
Herbert T. Ueda, Donald E. Garfield
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A possible unique ecosystem in the endoglacial hypersaline brines in Antarctica. [PDF]
Sci Rep, 2023 Guglielmin M +10 more
europepmc +1 more source