Results 31 to 40 of about 934 (207)

Air-temperature control on diurnal variations in microseismicity at Laohugou Glacier No. 12, Qilian Mountains

Annals of Glaciology, 2019
We conducted a 9-d seismic experiment in October 2015 at Laohugou Glacier No. 12. We identified microseismic signals using the short-term/long-term average trigger algorithm at four stations and classified them as long and short-duration events based on ...
Tao Zhang, Yuqiao Chen, Min Ding, Zhongyan Shen, Yuande Yang, Qingsheng Guan   +5 more
doaj   +1 more source

Ground penetrating radar in temperate ice: englacial water inclusions as limiting factor for data interpretation

Journal of Glaciology, 2023
Ground penetrating radar (GPR) has been extensively used in glaciology to infer glacier's ice thickness, liquid water content, water drainage pathways, and other properties.
Christophe Ogier, Dirk-Jan van Manen, Hansruedi Maurer, Ludovic Räss, Marian Hertrich, Andreas Bauder, Daniel Farinotti   +6 more
doaj   +1 more source

Monitoring ice-capped active Volćan Villarrica, southern Chile, using terrestrial photography combined with automatic weather stations and global positioning systems

, 2008
Volc´an Villarrica (39◦25'12" S, 71◦56'27"W; 2847ma.s.l.) is an active ice-capped volcano located in the Chilean lake district. The surface energy balance and glacier frontal variations have been monitored for several years, using automatic weather ...
Rivera, Andrés, Clavero, Jorge, Brock, Ben, Corripio, Javier G., Wendt, Jens, Brock, Benjamin   +5 more
core   +1 more source

Case study of combined marine‐ and land‐based passive seismic surveying in front of Nordenskiöldbreen outlet glacier, Adolfbukta, Svalbard [PDF]

, 2023
Glaciers generate seismic waves due to calving and fracturing, meaning that recording and following event classification can be used to monitor glacier dynamics.
Helene Meling Stemland, Bent Ole Ruud, Stemland, Helene, Johansen, Tor Arne, Ruud, Bent Ole, Tor Arne Johansen   +5 more
core   +1 more source

Increasing contribution of grain boundary compliance to polycrystalline ice elasticity as temperature increases

Journal of Glaciology, 2018
Measured elastic stiffnesses of ice polycrystals decrease with increasing temperature due to a decrease in grain boundary stiffness with increasing temperature.
COLIN M. SAYERS
doaj   +1 more source

Imaging englacial and subglacial drainage networks with UAV-based 3D GPR

Journal of Glaciology
Meltwater drainage through glaciers strongly influences ice dynamics and related hazards, yet detailed observations of active englacial and subglacial networks remain scarce due to challenges in direct observation.
Johanna Klahold, Gabriela Clara Racz, Bastien Ruols, James Irving   +3 more
doaj   +1 more source

Seismic observations of crevasse growth following rain-induced glacier acceleration, Haupapa/Tasman Glacier, New Zealand

Annals of Glaciology, 2019
Changing rates of water input can affect both the flow of glaciers and ice sheets and their propensity to crevasse. Here we examine geodetic and seismic observations during two substantial (10–18-times background velocity) rain-induced glacier ...
Samuel Taylor-Offord, Huw Horgan, John Townend, J. Paul Winberry   +3 more
doaj   +1 more source

The precision of radar-derived subglacial bed topography: a case study from Pine Island Glacier, Antarctica

Annals of Glaciology, 2020
Recent advances in the measurement of bedforms beneath active ice streams have been made using ground-based grid profiling using impulse radar systems operating with centre frequencies in the 3–5 MHz range.
Edward C. King
doaj   +1 more source

Meteorology and surface energy fluxes in the 2005–2007 ablation seasons at the Miage debris-covered glacier, Mont Blanc Massif, Italian Alps

, 2010
During the 2005–2007 June–September ablation seasons, meteorological conditions were recorded on the lower and upper parts of the debris‐covered ablation zone of Miage Glacier, Italy. In 2005, debris temperature and subdebris ice melt were also monitored
Mihalcea, Claudia, Diolaiuti, Guglielmina, G.A. Diolaiuti, Brock, Ben W., Kirkbride, Martin P., M. Kirkbride, C.E. Mihalcea, Cutler, Mark E. J.; id_orcid, C. Smiraglia, M. E. J. Cutler, Cutler, Mark, Brock, Benjamin, Kirkbride, Martin, Smiraglia, Claudio, B. W. Brock   +14 more
core   +1 more source

Image analysis techniques to estimate river discharge using time-lapse cameras in remote locations [PDF]

, 2015
Cameras have the potential to provide new data streams for environmental science. Improvements in image quality, power consumption and image processing algorithms mean that it is now possible to test camera-based sensing in real-world scenarios.
Martinez, Kirk, Kirk Martinez, Hart, Jane K., Jane K. Hart, Young, David S., David S. Young   +5 more
core   +1 more source