Results 111 to 120 of about 7,958 (231)

On the Birth of Structural and Crystallographic Fabric Signals in Polar Snow: A Case Study From the EastGRIP Snowpack

Frontiers in Earth Science, 2020
The role of near-surface snow processes for the formation of climate signals through densification into deep polar firn is still barely understood. To this end we have analyzed a shallow snow pit (0-3 meters) from EastGRIP (Greenland) and derived high ...
Maurine Montagnat, Maurine Montagnat, Henning Löwe, Neige Calonne, Martin Schneebeli, Margret Matzl, Matthias Jaggi   +6 more
doaj   +1 more source

Microwave emission from polar firn [PDF]

The microwave emission from a half-space medium, characterized by coordinate dependent scattering and absorbing centers, was calculated by numerically solving the radiative transfer equation by the method of invariant imbedding. Rayleigh scattering phase
Chang, A. T. C., Choudhury, B. J.
core   +1 more source

Simulating ice core 10Be on the glacial–interglacial timescale [PDF]

, 2015
10Be ice core measurements are an important tool for paleoclimate research, e.g., allowing for the reconstruction of past solar activity or changes in the geomagnetic dipole field.
Christl, Mark J, Dibb, Jack E., Elsasser, C, Kipfstuhl, S, Levin, I, Seietstad, I K, Stanzick, A, Wagenbach, D, Wallner, A, Wershofen, H   +9 more
core   +1 more source

Relaxation of the leaf economics spectrum within and across quaking aspen Populus tremuloides genotypes

Oikos, Volume 2025, Issue 12, December 2025.
Plant functional traits typically show strong covariation, e.g. as in the worldwide leaf economics spectrum (LES). Covariation is thought to arise from selective forces and physical constraints. However, processes shaping covariation at interspecific scales may differ from those at intraspecific scales.
Jolanta Rieksta, Bente J. Graae, Kenny Helsen, Rozália E. Kapás, Richard Strimbeck, Benjamin W. Blonder   +5 more
wiley   +1 more source

Relationship between continuous aerosol measurements and firn core chemistry over a 10-year period at the South Pole [PDF]

, 1998
Before ice core chemistry can be used to estimate past atmospheric chemistry it is necessary to establish an unambiguous link between concentrations of chemical species in the air and snow.
Bergin, M H, Dibb, Jack E., Mayewski, Paul A, Meyerson, E A   +3 more
core   +2 more sources

Diffusion of stable isotopes in polar firn and ice: the isotope effect in firn diffusion

Diffusion of stable isotopes in polar firn and ice : the isotope effect in firn diffusion
International Symposium on Physics of Ice Core Records. Shikotsukohan, Hokkaido, Japan, September 14-17, 1998.
Johnsen, Sigfús. J., Clausen, Henrik B., Cuffey, Kurt M., Hoffmann, Georg, Schwander, Jakob, Creyts, Timothy, Hondoh, Takeo   +6 more
openaire   +2 more sources

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

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  

Investigating the influence of local insolation on near-surface snow grain properties to constrain the mechanisms of pore close-off and associated elemental fractionation in polar firn

, 2022
Romilly Harris Stuart, Amaëlle Landais, Patricia Martinerie, Marie Dumont, Mathieu Fructus, Anaïs Orsi, Quentin Libois, Laurent Arnaud, C. Max Stevens, Antoine Grisart, Frédéric Prié   +10 more
openalex   +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