Results 211 to 220 of about 7,958 (231)

Radioactivity and geochemical characteristics of cryoconite on the Tien Shan glacier. [PDF]

Sci Rep
Miroshnikov A, Serikov A, Kokarev A, Severinenko M, Lennik S, Kharkin P, Akhmetzhanova D, Krasnopyorova M, Milts O, Makarova V, Morenko V, Fedulov V, Kapitsa V, Kasatkin N, Asadulin E, Nadyarnykh G, Sakhiev S.   +16 more
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Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica. [PDF]

Sci Data
Pritchard HD, Fretwell PT, Fremand AC, Bodart JA, Kirkham JD, Aitken A, Bamber J, Bell R, Bianchi C, Bingham RG, Blankenship DD, Casassa G, Christianson K, Conway H, Corr HFJ, Cui X, Damaske D, Damm V, Dorschel B, Drews R, Eagles G, Eisen O, Eisermann H, Ferraccioli F, Field E, Forsberg R, Franke S, Goel V, Gogineni SP, Greenbaum J, Hills B, Hindmarsh RCA, Hoffman AO, Holschuh N, Holt JW, Humbert A, Jacobel RW, Jansen D, Jenkins A, Jokat W, Jong L, Jordan TA, King EC, Kohler J, Krabill W, Maton J, Gillespie MK, Langley K, Lee J, Leitchenkov G, Leuschen C, Luyendyk B, MacGregor JA, MacKie E, Moholdt G, Matsuoka K, Morlighem M, Mouginot J, Nitsche FO, Nost OA, Paden J, Pattyn F, Popov S, Rignot E, Rippin DM, Rivera A, Roberts JL, Ross N, Ruppel A, Schroeder DM, Siegert MJ, Smith AM, Steinhage D, Studinger M, Sun B, Tabacco I, Tinto KJ, Urbini S, Vaughan DG, Wilson DS, Young DA, Zirizzotti A.   +81 more
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Densification of firn-ice transition area and integrated densification model at an inner plateau on an ice sheet in polar regions

Takako TOYOYAMA
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Creep of polar firn

Cold Regions Science and Technology, 1999
Abstract It is the aim of the paper presented here to describe the creep behaviour of polar firn. To do so, creep tests under tension, compression and combined torsion–compression load were performed. The samples tested were examined to testify their structural properties and were classified to ensure comparability.
B. Meussen, O. Mahrenholtz, H. Oerter
openaire   +3 more sources

Convective mixing of air in firn at four polar sites

Earth and Planetary Science Letters, 2006
Air withdrawn from the firn at four polar sites (Dome Fuji, H72 and YM85, Antarctica and North GRIP, Greenland) was measured for δ 15 No f N2 and δ 18 Oo f O2 to test for the presence of convective air mixing in the top part of the firn, known as the “convective zone”.
Kenji Kawamura, Jeffrey P. Severinghaus, Shigeyuki Ishidoya, Satoshi Sugawara, Gen Hashida, Hideaki Motoyama, Yoshiyuki Fujii, Shuji Aoki, Takakiyo Nakazawa   +8 more
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The in-situ dielectric constant of polar firn revisited

Cold Regions Science and Technology, 1995
Abstract The success in using VHF and UHF frequency systems for sounding polar ice sheets has been tempered by an uncertainty in the in-situ dielectric constant which controls the effective velocity of an electromagnetic wave propagating in an air-ice mixture. An empirical equation for determining the relative real dielectric constant ϵ′r vs. density
Austin Kovacs, Anthony J. Gow, Rexford M. Morey   +2 more
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Settlement of a Large Structure on Polar Firn

Current Practices in Cold Regions Engineering, 2006
Sustainable engineering in remote cold regions requires use of readily-available natural materials for engineering applications such as building foundations. Construction of a large structure at the South Pole provides a unique opportunity to observe settlement of a compacted snow and firn foundation.
Jason C. Weale, George L. Blaisdell
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Use of Shear Waves to Measure Poisson’s Ratio in Polar Firn

Journal of Environmental and Engineering Geophysics, 2007
We conducted a seismic experiment on polar firn on Adelaide Island, Antarctica. We measured the speed of compressional and shear waves at different depths in the firn by sampling waves that return to the surface following continuous refraction. To overcome the difficulty of picking shear wave arrivals in the presence of dispersed compressional waves ...
King, Edward C., Jarvis, Eric P.
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Emerging Constraints on the H₂ Budget From Polar Firn Air Reconstructions

Journal of Geophysical Research: Atmospheres
AbstractComparison of modeled atmospheric hydrogen (H2) levels with observations is an important way of testing the scientific understanding of H2 biogeochemistry. But the instrumental record is short and provides a limited dynamic range with which to test assumptions about H2 cycling.
John D. Patterson, Eric S. Saltzman, Fabien Paulot   +2 more
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