Zobrazeno 1 - 10
of 39
pro vyhledávání: '"subglacial exploration geophysics"'
Publikováno v:
Annals of Glaciology, Vol 65 (2025)
Subglacial seismicity presents the opportunity to monitor inaccessible glacial beds at the epicentral location and time. Glaciers can be underlain by rock or till, a first order control on bed mechanics. Velocity-weakening, necessary for unstable sli
Externí odkaz:
https://doaj.org/article/dc86d0774e744f8e9ea2f5f0ebbdfc6b
Autor:
Pavel G. Talalay, Da Gong, Xiaopeng Fan, Yazhou Li, German Leitchenkov, Bing Li, Nan Zhang, Rusheng Wang, Yang Yang, Jialin Hong
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1524-1528 (2023)
A 198.8 m deep borehole was drilled through ice to subglacial bedrock in the northwestern marginal part of Princess Elizabeth Land, ~12 km south of Zhongshan Station, in January–February 2019. Three years later, in February 2022, the borehole tempe
Externí odkaz:
https://doaj.org/article/36132d461103449585673d1e4bd886b7
Autor:
Nathan T. Stevens, Collin J. Roland, Lucas K. Zoet, Richard B. Alley, Dougal D. Hansen, Emily Schwans
Publikováno v:
Journal of Glaciology, Vol 69, Pp 71-86 (2023)
Glacier motion responds dynamically to changing meltwater inputs, but the multi-decadal response of basal sliding to climate remains poorly constrained due to its sensitivity across multiple timescales. Observational records of glacier motion provide
Externí odkaz:
https://doaj.org/article/ad247671b405494e869da6d5a4ebf1a6
Publikováno v:
Journal of Glaciology, Vol 67, Pp 671-684 (2021)
Knowledge of glacier volume is crucial for ice flow modelling and predicting the impacts of climate change on glaciers. Rugged terrain, harsh weather conditions and logistic costs limit field-based ice thickness observations in the Himalaya. Remote-s
Externí odkaz:
https://doaj.org/article/b7c9913d64994918b753a697078991d9
Autor:
Pavel Talalay, Youhong Sun, Xiaopeng Fan, Nan Zhang, Pinlu Cao, Rusheng Wang, Alexey Markov, Xingchen Li, Yang Yang, Mikhail Sysoev, Yongwen Liu, Yunchen Liu, Wei Wu, Da Gong
Publikováno v:
Annals of Glaciology, Vol 62, Pp 1-11 (2021)
Drilling to the bedrock of ice sheets and glaciers offers unique opportunities for examining the processes occurring in the bed. Basal and subglacial materials contain important paleoclimatic and paleoenvironmental records and provide a unique habita
Externí odkaz:
https://doaj.org/article/756a09a560bf4d0ca1dff57dc19a2191
Autor:
Pavel Talalay, Xingchen Li, Nan Zhang, Xiaopeng Fan, Youhong Sun, Pinlu Cao, Rusheng Wang, Yang Yang, Yongwen Liu, Yunchen Liu, Wei Wu, Cheng Yang, Jialin Hong, Da Gong, Han Zhang, Xiao Li, Yunwang Chen, An Liu, Yazhou Li
Publikováno v:
Annals of Glaciology, Vol 62, Pp 12-22 (2021)
A new, modified version of the cable-suspended Ice and Bedrock Electromechanical Drill (IBED) was designed for drilling in firn, ice, debris-rich ice and rock. The upper part of the drill is almost the same for all drill variants and comprises four s
Externí odkaz:
https://doaj.org/article/a89598d879e144e9a721bb216cd40edd
Autor:
Edward C. King
Publikováno v:
Annals of Glaciology, Vol 61, Pp 154-161 (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. Surveys of Rutford Ice Stream and Pine Is
Externí odkaz:
https://doaj.org/article/19138144c4314f5682a415440ec009e3
Autor:
Bangbing Wang, Bo Sun, Jiaxin Wang, Jamin Greenbaum, Jingxue Guo, Laura Lindzey, Xiangbin Cui, Duncan A. Young, Donald D. Blankenship, Martin J. Siegert
Publikováno v:
Annals of Glaciology, Vol 61, Pp 124-134 (2020)
Radio-echo sounding (RES) can be used to understand ice-sheet processes, englacial flow structures and bed properties, making it one of the most popular tools in glaciological exploration. However, RES data are often subject to ‘strip noise’, cau
Externí odkaz:
https://doaj.org/article/1bf237a1e8dd4fad90b1c9f187ea8e8a
Publikováno v:
Annals of Glaciology, Vol 60, Pp 82-90 (2019)
Recent seismic measurements from upper Thwaites Glacier indicate that the bed-type variability is closely related to the along-flow basal topography. In high-relief subglacial highlands, stoss sides of topographic highs have a relatively higher acous
Externí odkaz:
https://doaj.org/article/cd9a19d11b31406db1c2b6264081c7a0
Autor:
Siobhan F. Killingbeck, Adam D. Booth, Philip W. Livermore, Landis J. West, Benedict T. I. Reinardy, Atle Nesje
Publikováno v:
Annals of Glaciology, Vol 60, Pp 206-219 (2019)
Fast ice flow is associated with the deformation of subglacial sediment. Seismic shear velocities, Vs, increase with the rigidity of material and hence can be used to distinguish soft sediment from hard bedrock substrates. Depth profiles of Vs can be
Externí odkaz:
https://doaj.org/article/0ce68042c52b4fedb5decabd0c50c5e4