Results 61 to 70 of about 145,942 (141)

A confined–unconfined aquifer model for subglacial hydrology and its application to the Northeast Greenland Ice Stream [PDF]

The Cryosphere, 2018
Subglacial hydrology plays an important role in ice sheet dynamics as it determines the sliding velocity. It also drives freshwater into the ocean, leading to undercutting of calving fronts by plumes.
S. Beyer, S. Beyer, T. Kleiner, V. Aizinger, V. Aizinger, M. Rückamp, A. Humbert, A. Humbert   +7 more
doaj   +1 more source

3D Architecture of Kodiak Butte as Evidence of Fluvial or Shoal‐Water Environments in Jezero Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract The Mars 2020 mission has explored depositional environments recorded in a fan‐shaped deposit on the western side of Jezero crater. Kodiak butte is an isolated outcrop of sedimentary rock ∼1 km south of the western fan scarp and may be an erosional remnant of said fan.
O. A. Kanine, M. P. Lamb, B. L. Ehlmann, J. P. Grotzinger, C. D. Tate   +4 more
wiley   +1 more source

Automatic Detection of Subglacial Water Bodies in the AGAP Region, East Antarctica, Based on Short-Time Fourier Transform

Remote Sensing, 2023
Subglacial water bodies are critical components in analyzing the instability of the Antarctic ice sheet. Their detection and identification normally rely on geophysical and remote sensing methods such as airborne radar echo sounding (RES), ground seismic,
Tong Hao, Liwen Jing, Jiashu Liu, Dailiang Wang, Tiantian Feng, Aiguo Zhao, Rongxing Li   +6 more
doaj   +1 more source

Air–Water Greenhouse Gases Exchange in Surface Waters of Deception Island (South Shetland Archipelago, Antarctica): Assessment of Drivers of Spatial Variability

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 10, October 2026.
Abstract Greenhouse gases (GHGs) such as Carbon Dioxide (CO2), Methane (CH4), and Nitrous Oxide (N2O) play critical roles in global climate change. CO2 dominates due to its high concentration and long atmospheric lifetime, while CH4 and N2O also exert strong heat‐trapping effects despite shorter residence times. Deception Island, in the Southern Ocean,
S. Amaya‐Vías, A. Brusselman, B. Delille, M. de la Paz, M. Díez‐Minguito, S. Flecha, O. Belyaev, G. Navarro, A. Tovar‐Sánchez, I. E. Huertas   +9 more
wiley   +1 more source

A model of water extraction from the subglacial hydrologic system under idealized conditions [PDF]

The Cryosphere
Subglacial water modulates glacier velocity across a wide range of space and time scales by influencing friction at the glacier bed. Observations show ice acceleration due to supraglacial lake drainage and water draining through moulins, where both ...
C. R. Meyer, K. L. P. Warburton, A. N. Sommers, B. M. Minchew, B. M. Minchew   +4 more
doaj   +1 more source

Reconstructing subglacial lake activity with an altimetry-based inverse method

Journal of Glaciology, 2023
Subglacial lake water-volume changes produce ice-elevation anomalies that provide clues about water flow beneath glaciers and ice sheets. Significant challenges remain in the quantitative interpretation of these elevation-change anomalies because the ...
Aaron G. Stubblefield, Colin R. Meyer, Matthew R. Siegfried, Wilson Sauthoff, Marc Spiegelman   +4 more
doaj   +1 more source

Direct Flux Measurements Reveal CO2 Sinks in Icelandic Glacial Streams Driven by Weathering and Hydrological Mixing

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 10, October 2026.
Abstract Glacier‐fed rivers are increasingly recognized as important components of high‐latitude carbon cycling, yet direct observations of CO2 exchange in proglacial streams remain limited, especially in young basaltic catchments. Here, we quantify spatial and seasonal patterns of CO2 exchange along a 3‐km reach of the glacier‐fed stream Virkisá ...
Ann‐Kathrin Wild, Christina Fasching, Max G. Rudolph, Kyle S. Boodoo, Andreas Hartmannn, Peter Chifflard   +5 more
wiley   +1 more source

Subglacial hydrology at Rink Isbræ, West Greenland inferred from sediment plume appearance

Annals of Glaciology, 2016
Marine-terminating outlet glaciers discharge most of the Greenland ice sheet's mass through frontal ablation and meltwater runoff. While calving can be estimated by in situ and remote sensing observations, submarine melting and subglacial meltwater ...
Kristin M. Schild, Robert L. Hawley, Blaine F. Morriss   +2 more
doaj   +1 more source

LGM glaciation in the northern Dinaric Mountains, Slovenia: new insights from terrestrial cosmogenic nuclide dating and Parallel Ice Sheet Model simulation

Boreas, Volume 55, Issue 4, Page 1124-1142, October 2026.
The Dinaric Mountains are a mountain range stretching NW–SE from the Alps to the Albanides–Hellenides in central Europe. The highest parts were occupied by small ice fields and/or valley glaciers during the Quaternary cold periods, while even today some small glaciers still exist in topoclimatically favourable areas.
Manja Žebre, M. Akif Sarikaya, Matjaž Depolli, Uroš Stepišnik, Attila Çiner, Gregor Kosec, Klaus Wilcken, Cengiz Yildirim   +7 more
wiley   +1 more source

Episodic Subglacial Drainage Cascades Below the Northeast Greenland Ice Stream

Geophysical Research Letters, 2023
Subglacial hydrology can exert an important control on ice flow by affecting friction at the ice‐bedrock interface. Here, we report on a series of subglacial drainage events along the Northeast Greenland Ice Stream (NEGIS), initiating as far inland as ...
J. K. Andersen, N. Rathmann, C. S. Hvidberg, A. Grinsted, A. Kusk, J. P. Merryman Boncori, J. Mouginot   +6 more
doaj   +1 more source