Results 31 to 40 of about 616 (247)

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

Using active geophysical methods to characterise a temperate glacier's hydrological system

, 2021
Worldwide, glaciers are receding as a consequence of climate change. Due to the global glacier recession, glaciers are experiencing enhanced melting, which results in an increase in meltwater availability. This increased meltwater has the ability to alter the glacier's hydraulic conditions and ultimately affects the dynamics of glaciers.
  +6 more sources

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

Station‐Based Assessment of Sub‐Seasonal Climate Trends in the Tyrolean Alps (Austria)

International Journal of Climatology, EarlyView.
In this study, we quantify the magnitude and significance of sub‐seasonal trends in the Tyrolean Alps (Austria) by collecting, processing and analysing meteorological observations from a dense network of climate stations. Our analysis indicates a warming rate of 0.43°C/dec over 1964–2023, greater sub‐seasonal trend variability when the analysis window ...
Erwin Rottler, Elena Bertazza, Franz Wagner, Gertraud Meißl, Theresa Schellander‐Gorgas, Johannes Schöber, Ulrich Strasser   +6 more
wiley   +1 more source

Aerogeophysical characterization of an active subglacial lake system in the David Glacier catchment, Antarctica [PDF]

The Cryosphere, 2020
In the 2016–2017 austral summer, the University of Texas Institute for Geophysics (UTIG) and the Korea Polar Research Institute (KOPRI) collaborated to perform a helicopter-based radar and laser altimeter survey of lower David Glacier with the goals of ...
L. E. Lindzey, L. E. Lindzey, L. E. Lindzey, L. H. Beem, D. A. Young, E. Quartini, E. Quartini, E. Quartini, D. D. Blankenship, D. D. Blankenship, C.-K. Lee, W. S. Lee, J. I. Lee, J. Lee   +13 more
doaj   +1 more source

Optimising Sulphur Fertilisation in Ryegrass–White Clover Swards Reduces Leached Nitrate Nitrogen Losses, While Increasing Plant Yield and Nitrogen Off‐Take

Journal of Plant Nutrition and Soil Science, EarlyView.
The inclusion of sulphur at two inorganic nitrogen rates (0 and 150 kg N ha−1) improves plant productivity in a ryegrass–white clover sward and reduces nitrate‐N loss to groundwater in a free‐draining sandy loam soil. ABSTRACT Background Reducing nitrogen (N) losses to water, lessening reliance on inorganic fertiliser and maintaining agricultural ...
Donal Kinsella, Imelda A. Casey, Patrick J. Forrestal   +2 more
wiley   +1 more source

QFuego-Patagonia: A comprehensive glacier-related dataset for Patagonia and Tierra del Fuego, South America

Journal of Glaciology
Patagonia and Tierra del Fuego (Austral Andes) are the most glacierised regions in the Southern Hemisphere, where glaciers have experienced significant mass changes in recent decades.
David Farías-Barahona, Matthias Braun, Marius Schaefer, Shin Sugiyama, Andrés Rivera, Gino Casassa, Valentina Peña-Santibañez, Johannes Fürst, Franziska Temme, Ilaria Tabone, Masamu Aniya, Jan Erik Arndt, Rodrigo Aguayo, Sebastien Bertrand, Norbert Blindow, Francisca Bown, Claudio Bravo, Tomas Carrasco-Escaff, Camila Cáceres, Bethan J. Davies, Inés Dussaillant, Daniel Falaschi, Alfonso Fernández, Gisella Gacitúa, Ricardo Giesecke, Neil F. Glasser, Shuntaro Hata, Jorge Huenante, Inigo Irarrazaval, Pablo Iribarren-Anacona, Eñaut Izagirre, Lukas Langhamer, Thomas Loriaux, Pamela Maldonado, Philipp Malz, Luciano Mendoza, Morgan McDonnell, Wolfgang H. Meier, Romain Millan, Masahiro Minowa, Michał Pętlicki, Andreas Richter, Lucas Ruiz, Tobias Sauter, Ryan Wilson   +44 more
doaj   +1 more source

Detecting and characterising an englacial conduit network within a temperate Swiss glacier using active seismic, ground penetrating radar and borehole analysis

Annals of Glaciology, 2019
Englacial hydrology plays an important role in routing surface water to the glacier's bed and it consequently affects the glacier's dynamics. However, it is often difficult to observe englacial conduit conditions on temperate glaciers because of their ...
Gregory Church, Andreas Bauder, Melchior Grab, Lasse Rabenstein, Satyan Singh, Hansruedi Maurer   +5 more
doaj   +1 more source