Results 31 to 40 of about 153,318 (201)

West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene [PDF]

Nature Communications
Mass loss from polar ice sheets is poorly constrained in estimates of future global sea-level rise. Today, the marine-based West Antarctic Ice Sheet is losing mass at an accelerating rate, most notably in the Thwaites and Pine Island glacier drainage ...
Sandra Passchier, Claus-Dieter Hillenbrand, Sidney Hemming, Werner Ehrmann, Thomas Frederichs, Steve M. Bohaty, Ronald Leon, Olga Libman-Roshal, Lisbeth Mino-Moreira, Karsten Gohl, Julia Wellner   +10 more
doaj   +2 more sources

Glacial Earthquakes and Precursory Seismicity Associated With Thwaites Glacier Calving [PDF]

Geophysical Research Letters, 2020
We observe two (~MS 3) long‐period (10–30 s) seismic events that originate from the terminus of Thwaites Glacier, Antarctica. Serendipitous acquisition of satellite images confirm that the seismic events were glacial earthquakes generated during the ...
J. Paul Winberry, Audrey D. Huerta, Sridhar Anandakrishnan, Richard C. Aster, Andrew A. Nyblade, Douglas A. Wiens   +5 more
doaj   +2 more sources

Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing [PDF]

The Cryosphere, 2020
The geometry of the sea floor immediately beyond Antarctica's marine-terminating glaciers is a fundamental control on warm-water routing, but it also describes former topographic pinning points that have been important for ice-shelf buttressing ...
K. A. Hogan, R. D. Larter, A. G. C. Graham, R. Arthern, J. D. Kirkham, J. D. Kirkham, R. Totten Minzoni, T. A. Jordan, R. Clark, V. Fitzgerald, A. K. Wåhlin, J. B. Anderson, C.-D. Hillenbrand, F. O. Nitsche, L. Simkins, J. A. Smith, K. Gohl, J. E. Arndt, J. Hong, J. Wellner   +19 more
doaj   +2 more sources

Retreat of Thwaites Glacier Triggered by its Neighbours

The Amundsen Sea Embayment in West Antarctica is experiencing the most rapid mass loss and grounding line retreat in Antarctica. Its glaciers are vulnerable to retreat through marine ice sheet instability. There is uncertainty over the timing and magnitude of retreat and in particular the response of Thwaites Glacier to thinning of its ice shelf and to
Stephen Cornford, Suzanne Bevan
core   +4 more sources

Recent Observations of Thwaites Glacier, West Antarctica Are Consistent With High Rates of Loss in Next 50 Years

Geophysical Research Letters
Thwaites Glacier has experienced accelerating mass loss, with rates increasing over fivefold since the 1990s. We apply transient calibration to two independent ice‐sheet models (STREAMICE and ISSM) using time‐varying velocity and surface elevation data ...
Daniel N. Goldberg, Mathieu Morlighem, Noel Gourmelen   +2 more
doaj   +2 more sources

How much, how fast?: A science review and outlook for research on the instability of Antarctica's Thwaites Glacier in the 21st century

Global and Planetary Change, 2017
Constraining how much and how fast the West Antarctic Ice Sheet (WAIS) will change in the coming decades has recently been identified as the highest priority in Antarctic research (National Academies, 2015).
Sridhar Anandakrishnan, Knut Christianson   +1 more
exaly   +2 more sources

Data-driven bed rheology enhances retreat on Thwaites Glacier

Journal of Glaciology
Field data suggest that Thwaites Glacier’s bed is composed of alternating areas of hard and soft material with correlated topographic variations. Prior modeling shows that forced response differs strongly for simulations on endmember beds, suggesting ...
Emily Schwans, Byron Parizek, Richard B. Alley, Sridhar Anandakrishnan, Shujie Wang   +4 more
doaj   +2 more sources

Two decades of dynamic change and progressive destabilization on the Thwaites Eastern Ice Shelf [PDF]

The Cryosphere, 2021
The Thwaites Eastern Ice Shelf (TEIS) buttresses the eastern grounded portion of Thwaites Glacier through contact with a pinning point at its seaward limit. Loss of this ice shelf will promote further acceleration of Thwaites Glacier.
K. E. Alley, C. T. Wild, A. Luckman, T. A. Scambos, M. Truffer, E. C. Pettit, A. Muto, B. Wallin, M. Klinger, T. Sutterley, S. F. Child, C. Hulen, J. T. M. Lenaerts, M. Maclennan, E. Keenan, D. Dunmire   +15 more
doaj   +1 more source

Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica [PDF]

The Cryosphere, 2020
A system of subglacial lakes drained on Thwaites Glacier from 2012–2014. To improve coverage for subsequent drainage events, we extended the elevation and ice-velocity time series on Thwaites Glacier through austral winter 2019.
A. O. Hoffman, K. Christianson, D. Shapero, B. E. Smith, I. Joughin   +4 more
doaj   +1 more source

Persistent, extensive channelized drainage modeled beneath Thwaites Glacier, West Antarctica [PDF]

The Cryosphere, 2022
Subglacial hydrology is a leading control on basal friction and the dynamics of glaciers and ice sheets. At low discharge, subglacial water flows through high-pressure, sheet-like systems that lead to low effective pressures.
A. O. Hager, A. O. Hager, M. J. Hoffman, S. F. Price, D. M. Schroeder, D. M. Schroeder   +5 more
doaj   +1 more source