Results 41 to 50 of about 564 (170)
Frontiers in Earth Science, 2023 Introduction: The products of volcanic eruptions found in the snow, firn and ice deposits of the polar ice sheets are precious sources of information on the volcanic forcing of the climate system in the recent or remote past.
Arina N. Veres +6 more
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Estimation of gas record alteration in very low-accumulation ice cores [PDF]
Climate of the Past, 2020 We measured the methane mixing ratios of enclosed air in five ice core sections drilled on the East Antarctic Plateau. Our work aims to study two effects that alter the recorded gas concentrations in ice cores: layered gas trapping artifacts and firn ...
K. Fourteau +5 more
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Texture of Polar Firn for Remote Sensing [PDF]
Annals of Glaciology, 1987 Knowledge of the texture of polar firn is necessary for interpretation of remotely sensed data. We find that dry polar firn is an irregularly stratified, anisotropic medium. Grains in firn may be approximated as prolate spheroids with average axial ratios as high as 1.2 or greater and with a preferred orientation of long axes clustered around the ...
openaire +2 more sources
Dynamic time warping to quantify age distortion in firn cores impacted by melt processes
Annals of Glaciology, 2023 As warming intensifies across the Greenland ice sheet, an increasing number of shallow coring and radar studies are targeting the melt-impacted firn column to investigate meltwater processes.
Cedric J. Hagen, Joel T. Harper
doaj +1 more source
Gravitational separation in polar firn. Response to H CRAIG. [PDF]
Science, 1993 International ...
Raynaud, D. +6 more
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Learning to melt: Emulating Greenland surface melt from a polar RCM with machine learning [PDF]
The CryospherePredicting surface melt on the Greenland ice sheet is critical for understanding surface mass balance (SMB) and its sensitivity to a changing climate. Polar regional climate models (RCMs) are the primary tools for simulating melt and projecting future ...
E. Schlager +4 more
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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 +3 more
wiley +1 more source
Passive Radar Sounding for Firn Aquifer Monitoring
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingFirn aquifers may play an important role in the mass balance of the Greenland ice sheet, but changes in their water storage are challenging to measure due to their spatiotemporal variability.
Sean T. Peters +2 more
doaj +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.Abstract Paleoclimate reconstructions of wildfire using ice cores often rely on high‐resolution aerosol records of refractory black carbon (rBC) or ammonium (NH4+). The interpretation of such records, however, can be hindered by uncertainties related to long‐range atmospheric transport, spatial distribution and strength of emissions, as well as ...
Drake McCrimmon +4 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract Isolating glacial isostatic adjustment (GIA) signals from Global Navigation Satellite System (GNSS) observations of vertical land motion (VLM) in Greenland requires removal of elastic solid Earth response to contemporary ice mass change. This elastic correction depends on ice‐surface elevation changes derived from satellite altimetry and firn ...
Holly Kyeore Han +6 more
wiley +1 more source