Results 51 to 60 of about 531 (138)

Observations of creep of polar firn at different temperatures [PDF]

The Cryosphere
To improve our understanding of firn compaction and deformation processes, constant-load compressive creep tests were performed on specimens from a Summit, Greenland (72°35′ N, 38°25′ W) firn core that was extracted in June 2017.
Y. Li, Y. Li, K. Keegan, I. Baker
doaj   +1 more source

Distinct Groundwater Regimes in West Antarctic Sedimentary Basins Inferred From Magnetotelluric Imaging

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Subglacial sedimentary basins in Antarctica are hypothesized to modulate ice flow and biogeochemical cycles via groundwater and geothermal feedbacks, yet their properties remain poorly constrained. Here, we present a joint quantitative analysis of new magnetotelluric (MT) data acquired at Thwaites Glacier (TG) and WAIS Divide, alongside legacy
Siobhan F. Killingbeck, Bernd Kulessa, Rebecca Pearce, Alex Brisbourne, Louise Borthwick, Felipe Napoleoni, Sridhar Anandakrishnan, Martyn Unsworth, Atsuhiro Muto   +8 more
wiley   +1 more source

Formation and development of supraglacial lakes in the percolation zone of the Greenland ice sheet

Journal of Glaciology, 2017
We examine repeat surface altimetry and radio echo observations of two supraglacial lakes in the percolation zone of the Greenland ice sheet to investigate the changes in firn conditions leading to lake formation and implications for meltwater storage ...
CHRISTINE CHEN, IAN M. HOWAT, SANTIAGO DE LA PEÑA   +2 more
doaj   +1 more source

Associations Between the Seasonal Darkening of the Greenland Ice Sheet and the Duration of Bare Ice

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Darkening of the Greenland ice sheet is known to amplify surface melting. Here, analysis of automatic weather station (AWS) data around the ice sheet and satellite‐derived albedo data reveals that the bare ice duration (BID) is a predictor of the average albedo during summer (June through August, JJA, α¯JJA ${\bar{\alpha }}_{\mathrm{JJA ...
Shunan Feng, Joseph Mitchell Cook, Jason Eric Box, Peter L. Langen, Martin Olesen, Alexandre Magno Anesio, Liane G. Benning, Martyn Tranter   +7 more
wiley   +1 more source

Atmospheric River‐Cyclone Events Disrupting an Antarctic Peninsula Field Campaign: Dynamics, Mesoscale Wind Amplification, and Long‐Term Context

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Extreme weather in the Antarctic Peninsula arises from interactions among large‐scale circulation variability, atmospheric rivers (ARs), extratropical cyclones, and complex coastal terrain, yet the linkages across these scales remain insufficiently resolved.
D. Bozkurt, F. Fernandoy, S. MacDonell, L. M. Gaete, J. F. Carrasco   +4 more
wiley   +1 more source

Satellite Mapping of the Moulin Distribution Across the Entire Greenland Ice Sheet

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Moulins drain meltwater from the surface of the Greenland Ice Sheet (GrIS), affecting subglacial hydrology. However, the moulin distribution across the entire GrIS remains unclear. Using 10‐m Sentinel‐2 imagery from the summer of 2019, we manually mapped GrIS‐wide major moulins, excluding undetectable minor moulins.
Yuhan Wang, Kang Yang, Jianing Wei, Wenzhuo Zhang, Dongyang Du, Wensong Zhang   +5 more
wiley   +1 more source

Utilizing NASA's Operation IceBridge Airborne SWE and Precipitation Products to Assess Surface Snow Over Alaskan Glaciers

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Accurately estimating Snow Water Equivalent (SWE) in glacierized regions is critical for glacier modeling and mass balance analysis yet remains challenging due to sparse observations and uncertainties in precipitation products. The objectives are twofold: (a) assess how well three widely used precipitation datasets—Stage IV (a radar–gauge ...
Yang Song, Ali Behrangi
wiley   +1 more source

Statistical Model of Subsurface Scattering Bias in ICESat‐2's ATL06 Product

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract ICESat‐2 uses visible laser pulses and photon‐counting detectors to range the Earth's surface, providing precision altimetry for measuring ice sheet elevation change. However, since water ice is transparent to visible light, the photon returns recorded by ICESat‐2's ATLAS instrument may originate from subsurface scattering inside the snow or ...
Thilini Bamunu Arachchige, Kelly E. Gleason, Jonathan C. Ryan, Markus Allgaier   +3 more
wiley   +1 more source

Firn Model Intercomparison Experiment (FirnMICE)

Journal of Glaciology, 2017
Evolution of cold dry snow and firn plays important roles in glaciology; however, the physical formulation of a densification law is still an active research topic.
JESSICA M.D. LUNDIN, C. MAX STEVENS, ROBERT ARTHERN, CHRISTO BUIZERT, ANAIS ORSI, STEFAN R.M. LIGTENBERG, SEBASTIAN B. SIMONSEN, EVAN CUMMINGS, RICHARD ESSERY, WILL LEAHY, PAUL HARRIS, MICHIEL M. HELSEN, EDWIN D. WADDINGTON   +12 more
doaj   +1 more source

Distinct El Niño Flavors and SAM Variability Modulate Surface Melt Over the Ross Ice Shelf

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.
Abstract Our study investigates how different flavors of El Niño, centered on the Eastern Pacific (EP) and Central Pacific (CP), and their interaction with the Southern Annular Mode (SAM) modulate surface melt events over the Ross Ice Shelf (RIS). Using satellite‐based melt observations, ERA5 reanalysis, high‐resolution regional model simulations, and ...
Sanjiban Dutta, Pranab Deb, Ruth Mottram, Nicolaj Hansen   +3 more
wiley   +1 more source