Progressive Deformation and Development of Fabric Across Zones of Shear in Glacial Ice

Author(s):  
P. J. Hudleston
Author(s):  
Anja Sundal ◽  
◽  
Elizabeth Petrie ◽  
Helge Hellevang ◽  
Ivar Midtkandal ◽  
...  

2021 ◽  
Author(s):  
Graciéle Cunha Alves de Menezes ◽  
Paulo E. A. S. Câmara ◽  
Otávio Henrique Bezerra Pinto ◽  
Peter Convey ◽  
Micheline Carvalho-Silva ◽  
...  

Geosciences ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 297 ◽  
Author(s):  
Dmitry V. Bantcev ◽  
Dmitry A. Ganyushkin ◽  
Kirill V. Chistyakov ◽  
Ilya V. Volkov ◽  
Alexey A. Ekaykin ◽  
...  

The aim of this study was to determine the contribution of snow and glacial ice to the river fluxes, and to identify the type of ice formation in the Tsambagarav massif (the northwestern part of Mongolia). The main method for this study was isotopic analysis of water samples. The isotopic separation showed that the shares of the main components in the total runoff differed for different rivers of the massif. Alongside with that, glacial meltwater prevailed in all the investigated fluxes. The share of snow and firn in the meltwater coming from the surface of the large valley glaciers in the middle of the ablation season in 2017 changed by only 10%—from 20% to 30%. Thus, further reduction of glaciation caused by global climate change could significantly affect the water balance of the study area. The isotopic composition of glacial ice proves that its alimentation primarily comes from precipitation during the transitional seasons. Superimposed ice is not the basis for nourishment of the glaciers of the Tsambagarav massif.


2016 ◽  
Vol 12 (S324) ◽  
pp. 322-329
Author(s):  
Kevin J. Meagher

AbstractThe IceCube Neutrino Observatory is a cubic kilometer neutrino telescope located at the Geographic South Pole. Cherenkov radiation emitted by charged secondary particles from neutrino interactions is observed by IceCube using an array of 5160 photomultiplier tubes embedded between a depth of 1.5 km to 2.5 km in the Antarctic glacial ice. The detection of astrophysical neutrinos is a primary goal of IceCube and has now been realized with the discovery of a diffuse, high-energy flux consisting of neutrino events from tens of TeV up to several PeV. Many analyses have been performed to identify the source of these neutrinos: correlations with active galactic nuclei, gamma-ray bursts, and the galactic plane. IceCube also conducts multi-messenger campaigns to alert other observatories of possible neutrino transients in real-time. However, the source of these neutrinos remains elusive as no corresponding electromagnetic counterparts have been identified. This proceeding will give an overview of the detection principles of IceCube, the properties of the observed astrophysical neutrinos, the search for corresponding sources (including real-time searches), and plans for a next-generation neutrino detector, IceCube–Gen2.


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