Results 61 to 70 of about 531 (138)

Local Variability of Ice Core Ammonium and Black Carbon Records From Tunu and Summit, Greenland: Implications for Long‐Term Biomass Burning Reconstructions

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, Nathan Chellman, Sophia Wensman, Andreas Plach, Joseph R. McConnell   +4 more
wiley   +1 more source

Discrepancy in Satellite Altimetry Products Hinders Robust Retrieval of GIA Signals From Bedrock GNSS Data in Greenland

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, Surendra Adhikari, Lambert Caron, Hui Gao, Parviz Ajourlou, Shfaqat Khan, Beata M. Csatho   +6 more
wiley   +1 more source

Long-lived halocarbon trends and budgets from atmospheric chemistry modelling constrained with measurements in polar firn [PDF]

Atmospheric Chemistry and Physics, 2009
The budgets of seven halogenated gases (CFC-11, CFC-12, CFC-113, CFC-114, CFC-115, CCl₄ and SF₆) are studied by comparing measurements in polar firn air from two Arctic and three Antarctic sites, and ...
P. Martinerie, E. Nourtier-Mazauric, J.-M. Barnola, W. T. Sturges, D. R. Worton, E. Atlas, L. K. Gohar, K. P. Shine, G. P. Brasseur   +8 more
doaj  

20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air [PDF]

Atmospheric Chemistry and Physics, 2006
Four trihalomethane (THM; CHCl3, CHBrCl2, CHBr2Cl and CHBr3) and two dihalomethane (DHM; CH2BrCl and CH2Br2) trace gases have been measured in air extracted from polar firn collected at the North Greenland Icecore Project (NGRIP) site.
D. R. Worton, W. T. Sturges, J. Schwander, R. Mulvaney, J.-M. Barnola, J. Chappellaz   +5 more
doaj  

Kinetic grain growth in firn induced by meltwater infiltration on the Greenland Ice Sheet [PDF]

The Cryosphere
The microstructure of polar firn governs its porosity, permeability, and compaction rate, and is thus critical to understanding surface elevation change, heat and gas exchange, and meltwater infiltration on ice sheets.
K. L. Gehl, J. T. Harper, N. F. Humphrey
doaj   +1 more source

Spatial distribution of vertical density and microstructure profiles in near-surface firn around Dome Fuji, Antarctica [PDF]

The Cryosphere
To better understand the near-surface evolution of polar firn in low-accumulation areas (<30 mm w.e. yr−1), we investigated the physical properties – density, microstructural anisotropy of ice matrix and pore space, and specific surface area (SSA ...
R. Inoue, R. Inoue, S. Fujita, S. Fujita, K. Kawamura, K. Kawamura, K. Kawamura, I. Oyabu, I. Oyabu, F. Nakazawa, F. Nakazawa, H. Motoyama, H. Motoyama, T. Aoki   +13 more
doaj   +1 more source

Probing the firn refractive index profile using antenna response

Journal of Glaciology
The Radio Neutrino Observatory-Greenland (RNO-G, at Summit Station) experiment comprises an extensive fat-dipole antenna array deployed into ice boreholes over an eventual area of approximately 35 km2.
Sanyukta Agarwal, J.A Aguilar, Nathaniel Alden, Shoukat Ali, Patrick Allison, Michael Betts, Dave Besson, Abby Bishop, Olga Botner, Sjoerd Bouma, Stijn Buitink, Ruben Camphyn, Simone Chiche, Brian Clark, Alan Coleman, Kenny Couberly, Simon De Kockere, Krijn deVries, Cosmin Deaconu, Pawan Giri, Christian Glaser, Thorsten Glusenkamp, Allan Hallgren, Steffen Hallmann, Jordan Christian Hanson, Bryan Hendricks, Jakob Henrichs, Nils Heyer, Christian Hornhuber, Enrique Huesca Santiago, Kaeli Hughes, Timo Karg, Albrecht Karle, John Kelly, Michael Korntheuer, Marek Kowalski, Ilya Kravchenko, Ryan Krebs, Robert Lahmann, Martin Liu, Matthew J Marsee, Curtis McLennan, Masha Mikhailova, Katharine Mulrey, Marco Muzio, Anna Nelles, Alexander Novikov, Alisa Nozdrina, Eric Oberla, Bob Oeyen, Noppadol Punsuebsay, Lilly Pyras, Martin Ravn, Dirk Ryckbosh, Felix Schluter, Olaf Scholten, David Seckel, Mohammad Ful Hossain Seikh, Julia Stachurska, Jethro Stoffels, Simona Toscano, Delia Tosi, James Tutt, Dieder Van den Broeck, Nick van Eijndhoven, Abigail G. Vieregg, Aishwarya Vijai, Christoph Welling, Dawn Williams, Philipp Windischhofer, Stephanie Wissel, Robert Young, Adrian Zink   +72 more
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source

An application of a seismic nodal system with seismic ambient noise near Kunlun Station, Antarctica: estimating ice thickness and firn structure

Earth and Planetary Physics
The thickness and upper densification structure of an ice sheet are important parameters for dynamic ice sheet modeling and glacier mass balance studies.
YuQiao Chen, Peng Yan, YuanDe Yang, XueKe Huang, Fei Li   +4 more
doaj   +1 more source

Anthropogenic perturbations to atmospheric methane reflected in Greenland firn air clumped isotope measurements. [PDF]

Sci Adv
Sivan M, Sun J, Martinerie P, Popa ME, Farquhar J, Krol M, van der Veen C, Dasgupta B, Haghnegahdar MA, Jensen CM, Yang JW, Freitag J, Fourteau K, Blunier T, Röckmann T.   +14 more
europepmc   +1 more source