Results 81 to 90 of about 256 (175)
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
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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
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The BAS ice shelf hot water drill: design, methods and tools [PDF]
, 2014 The 2011/12 Antarctic field season saw the first use of a new British Antarctic Survey (BAS) ice-shelf hot-water drill system on the Larsen C and George VI ice shelves.
Anker, Paul G.D. +3 more
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Instruments and Methods: The Resistograph and the Compressive Strength of Snow
, 1968 A recent field comparison of snow strength as measured by the snow resistograph and compressive strength as measured by direct loading to failure indicates good agreement in the range 25–400 g/cm2.
Charles C. Bradley
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, 1966 Advantages of neutron moisture probes over standard snow sampling tubes include integration of water content over a greater horizontal extent, easier measurement of snow layering, and possible increase in accuracy through elimination of the need to ...
Charles F. Cooper
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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
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Instruments and Methods: An Automatic Gauge for Measuring Sea-Ice Thickness
, 1968 A device is described which automatically measures the thickness of a floating ice cover at regular or any desired times and allows the result to be printed together with the time on a shore-based recorder.
Peter Schwerdtfeger
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Evaluation of existing and new methods of tracking glacier terminus change [PDF]
, 2014 ACKNOWLEDGEMENTS The authors thank two anonymous reviewers for constructive comments that helped to improve the manuscript. This research was financially supported by J.M.L.’s PhD funding from UK Natural Environment Research Council grant No.
Lea, James M. +5 more
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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
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Instruments and Methods: Improvements in the Measurement of A Lake-Ice Cover
, 1966 A device is described which gives direct measurements of the rates of accretion of ice on both the top and the bottom of lake ice without the necessity for repeated drilling. A method for measuring the hydrostatic water level is also described.
J. B. Shaw, W. P. Adams
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