Results 41 to 50 of about 289 (174)

A self-adaptive two-parameter method for characterizing roughness of multi-scale subglacial topography

Journal of Glaciology, 2021
During the last few decades, bed-elevation profiles from radar sounders have been used to quantify bed roughness. Various methods have been employed, such as the ‘two-parameter’ technique that considers vertical and slope irregularities in topography ...
Shinan Lang, Ben Xu, Xiangbin Cui, Kun Luo, Jingxue Guo, Xueyuan Tang, Yiheng Cai, Bo Sun, Martin J. Siegert   +8 more
doaj   +1 more source

The SUBGLACIOR drilling probe: hydraulic considerations

Annals of Glaciology, 2021
Using significant technological breakthroughs and unconventional approaches, the goal of the in situ probing of glacier ice for a better understanding of the orbital response of climate (SUBGLACIOR) project is to advance ice core research by inventing ...
O. Alemany, P. Talalay, P. Boissonneau, J. Chappellaz, J. F. Chemin, R. Duphil, E. Lefebvre, L. Piard, P. Possenti, J. Triest   +9 more
doaj   +1 more source

Measurement of snowpack density, grain size, and black carbon concentration using time-domain diffuse optics

Journal of Glaciology
Diffuse optical spectroscopy (DOS) techniques characterize scattering media by examining their optical response to laser illumination. Time-domain DOS methods involve illuminating the medium with a laser pulse and using a fast photodetector to measure ...
Connor Andrew Henley, Colin Richard Meyer, Jacob Ian Chalif, Joseph Lee Hollmann, Ramesh Raskar   +4 more
doaj   +1 more source

Paths forward in radioglaciology

Annals of Glaciology, 2022
Ice-penetrating radar sounding is a powerful geophysical tool for studying terrestrial and planetary ice with a rich glaciological heritage reaching back over half a century.
Dustin M. Schroeder
doaj   +1 more source

Snow and ice in the desert: reflections from a decade of connecting cryospheric science with communities in the semiarid Chilean Andes

Annals of Glaciology, 2022
Citizen science and related engagement programmes have proliferated in recent years throughout the sciences but have been reasonably limited in the cryospheric sciences.
Shelley MacDonell, Paloma Núñez Farías, Valentina Aliste, Álvaro Ayala, Camilo Guzmán, Patricio Jofré Díaz, Nicole Schaffer, Simone Schauwecker, Eric A. Sproles, Eduardo Yáñez San Francisco   +9 more
doaj   +1 more source

Instruments and Methods - A novel method for obtaining very large ancient air samples from ablating glacial ice for analyses of methane radiocarbon

, 2008
We present techniques for obtaining large (similar to 100 L STP) samples of ancient air for analysis of C-14 of methane ((CH4)-C-14) and other trace constituents.
Lowe, Dave, Harth, Christina M., Lowe, DC, Smith, Andrew M., Severinghaus, Jeffrey P., Headly, M, Severinghaus, JP, Schaefer, H, Weiss, RF, Weiss, Ray F., Muhle, J, Petrenko, Vasilii V., Reeh, N, Schaefer, Hinrich, Brook, EJ, Brook, Edward J., Reeh, Niels, Muhle, Jens, Headly, Melissa, Harth, CM, Smith, AM, Petrenko, VV   +21 more
core   +1 more source

Estimating the elastic modulus of landfast ice from wave observations

Journal of Glaciology, 2023
Progress in our understanding of wave–ice interactions is currently hindered by the lack of in situ observations and information of sea-ice properties, including the elastic modulus.
Joey J. Voermans, Jean Rabault, Aleksey Marchenko, Takehiko Nose, Takuji Waseda, Alexander V. Babanin   +5 more
doaj   +1 more source

Instruments and Methods Comparison of the Snow Resistograph with the Ram Penetrometer

, 1973
Comparative tests of the snow resistograph with the ram penetrometer indicate that there is a high degree of correlation between the two instruments despite fundamental differences in operation.
Charles C. Bradley, William St. Lawrence
core   +1 more source

Acquisition of a 3 min, two-dimensional glacier velocity field with terrestrial radar interferometry

Journal of Glaciology, 2017
Outlet glaciers undergo rapid spatial and temporal changes in flow velocity during calving events. Observing such changes requires both high temporal and high spatial resolution methods, something now possible with terrestrial radar interferometry. While
DENIS VOYTENKO, TIMOTHY H. DIXON, DAVID M. HOLLAND, RYAN CASSOTTO, IAN M. HOWAT, MARK A. FAHNESTOCK, MARTIN TRUFFER, SANTIAGO DE LA PEÑA   +7 more
doaj   +1 more source

How Big Data Can Help to Monitor the Environment and to Mitigate Risks due to Climate Change:A review [PDF]

Climate change triggers a wide range of hydrometeorological, glaciological, and geophysical processes that span across vast spatiotemporal scales. With the advances in technology and analytics, a multitude of remote sensing (RS), geodetic, and in situ ...
Forootan, Ehsan; id_orcid, Haberreiter, Margit, He, Xiaoxing, Finsterle, Wolfgang, Montillet, Jean-Philippe, Shum, CK, Kermarrec, Gaël, Fernandes, Rui   +7 more
core   +1 more source