Zobrazeno 1 - 10
of 396
pro vyhledávání: '"Richard B. Alley"'
Autor:
Emily Schwans, Byron R. Parizek, Richard B. Alley, Sridhar Anandakrishnan, Mathieu M. Morlighem
Publikováno v:
Journal of Glaciology, Vol 69, Pp 1241-1259 (2023)
Thwaites Glacier (TG) plays an important role in future sea-level rise (SLR) contribution from the West Antarctic Ice Sheet. Recent observations show that TG is losing mass, and its grounding zone is retreating. Previous modeling has produced a wide
Externí odkaz:
https://doaj.org/article/49c795a45d994bd7befe71ea2df13313
Autor:
Elisabeth Clyne, Richard B. Alley, Margot Vore, Dominik Gräff, Sridhar Anandakrishnan, Fabian Walter, Amandine Sergeant
Publikováno v:
Journal of Glaciology, Vol 69, Pp 370-380 (2023)
Glacial hydraulic tremor (GHT) can be monitored to observe changes in location and distribution of water flow beneath glacial ice, allowing the spatiotemporal evolution of subglacial hydrology to be studied continuously and remotely. We use frequency
Externí odkaz:
https://doaj.org/article/7c304b9edac741b7af9b49e8364beb50
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
Autor:
Richard B. Alley, Nick Holschuh, Byron Parizek, Lucas K. Zoet, Kiya Riverman, Atsuhiro Muto, Knut Christianson, Elisabeth Clyne, Sridhar Anandakrishnan, Nathan T. Stevens
Publikováno v:
Annals of Glaciology, Vol 63, Pp 153-157 (2022)
Glacier-bed characteristics that are poorly known and modeled are important in projected sea-level rise from ice-sheet changes under strong warming, especially in the Thwaites Glacier drainage of West Antarctica. Ocean warming may induce ice-shelf th
Externí odkaz:
https://doaj.org/article/01d8280fe2d24b058768ecbd1ecfd719
Publikováno v:
Annals of Glaciology, Vol 63, Pp 18-22 (2022)
Basal channels, which form where buoyant plumes of ocean water and meltwater carve troughs upwards into ice-shelf bases, are widespread on Antarctic ice shelves. The formation of these features modulates ice-shelf basal melt by influencing the flow o
Externí odkaz:
https://doaj.org/article/449f72a205c646d6ab480c16c0ff1928
Autor:
Sierra M. Melton, Richard B. Alley, Sridhar Anandakrishnan, Byron R. Parizek, Michael G. Shahin, Leigh A. Stearns, Adam L. LeWinter, David C. Finnegan
Publikováno v:
Journal of Glaciology, Vol 68, Pp 812-828 (2022)
Marine-terminating glaciers lose mass through melting and iceberg calving, and we find that meltwater drainage systems influence calving timing at Helheim Glacier, a tidewater glacier in East Greenland. Meltwater feeds a buoyant subglacial discharge
Externí odkaz:
https://doaj.org/article/65f79e3e50184fefa7f84ccf950914f8
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:
Kiya L. Riverman, Sridhar Anandakrishnan, Richard B. Alley, Nicholas Holschuh, Christine F. Dow, Atsuhiro Muto, Byron R. Parizek, Knut Christianson, Leo E. Peters
Publikováno v:
Annals of Glaciology, Vol 60, Pp 91-99 (2019)
We describe elongate, wet, subglacial bedforms in the shear margins of the NE Greenland Ice Stream and place some constraints on their formation. Lateral shear margin moraines have been observed across the previously glaciated landscape, but little i
Externí odkaz:
https://doaj.org/article/f18ed7d0d9db4c9fbec2759cb7171920
Autor:
Nathan R. Hopkins, Edward B. Evenson, Dario Bilardello, Richard B. Alley, Claudio Berti, Kenneth P. Kodama
Publikováno v:
Journal of Glaciology, Vol 65, Pp 770-779 (2019)
Basal ice of glaciers and ice sheets frequently contains a well-developed stratification of distinct, semi-continuous, alternating layers of debris-poor and debris-rich ice. Here, the nature and distribution of shear within stratified basal ice are a
Externí odkaz:
https://doaj.org/article/418f061a01fa430886847362c43b4811
Autor:
John M. Fegyveresi, Richard B. Alley, Donald E. Voigt, Joan J. Fitzpatrick, Lawrence A. Wilen
Publikováno v:
Annals of Glaciology, Vol 60, Pp 8-19 (2019)
Measurements of a sample from ~580 m depth in the WAIS Divide (WDC06A) ice core reveal that bubbles are preferentially elongated in the basal plane of their parent grain, as expected if bubble shape preserves the record of dominant basal glide. This
Externí odkaz:
https://doaj.org/article/d186581ba64c4a58a38c9654a8380165