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Effects of temperature and grain type on time variation of snow specific surface area

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Title: Effects of temperature and grain type on time variation of snow specific surface area
Other Titles: 積雪比表面積の時間変化に及ぼす温度および雪質の影響
Authors: HACHIKUBO, Akihiro1 Browse this author →KAKEN DB
YAMAGUCHI, Satoru2 Browse this author →KAKEN DB
ARAKAWA, Hayato3 Browse this author
TANIKAWA, Tomonori4 Browse this author
HORI, Masahiro5 Browse this author
SUGIURA, Konosuke6 Browse this author
MATOBA, Sumito7 Browse this author →KAKEN DB
NIWANO, Masashi8 Browse this author →KAKEN DB
KUCHIKI, Katsuyuki9 Browse this author →KAKEN DB
AOKI, Teruo10 Browse this author →KAKEN DB
Authors(alt): 八久保, 晶弘1
山口, 悟2
荒川, 逸人3
谷川, 朋範4
堀, 雅裕5
杉浦, 幸之助6
的場, 澄人7
庭野, 匡思8
朽木, 勝幸9
青木, 輝夫10
Keywords: SSA
BET theory
gas adsorption
methane
BET理論
ガス吸着
メタン
Issue Date: Aug-2014
Publisher: The Japanese Society of Snow and Ice
Journal Title: Bulletin of Glaciological Research
Volume: 32
Start Page: 47
End Page: 53
Publisher DOI: 10.5331/bgr.32.47
Abstract: The specific surface area (SSA) of snow is of particular interest to researchers because SSA is strongly related to snow albedo and is a comparatively better indicator of snow’s complexity than grain size. The time variation of SSA for fresh snow samples was observed in the laboratory under isothermal conditions at 226 K and 254 K using the gas adsorption method and Brunauer-Emmett-Teller theory. The SSA of the snow samples decreased with time under isothermal metamorphism. The decrease in SSA was fitted with the logarithmic equation proposed by Legagneux et al. (2003), and adjustable parameters were obtained. The rate of decrease in SSA depended on the shape of the initial snow type and temperature. Dendritic snow samples exhibited large initial SSAs, and their SSAs decreased faster compared with those of fragmented (collected from drifting snow) and plate-like precipitation particles with relatively small initial SSAs. The rate of decrease in SSA was lower at 226 K than that at 254 K.
Type: article
URI: http://hdl.handle.net/2115/56973
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 的場 澄人

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