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  1. 防災科研関係論文

Snow particle speeds in drifting snow

https://nied-repo.bosai.go.jp/records/6164
https://nied-repo.bosai.go.jp/records/6164
73cb7e49-2883-4131-b215-945d70dc7445
Item type researchmap(1)
公開日 2023-05-24
タイトル
言語 en
タイトル Snow particle speeds in drifting snow
言語
言語 eng
著者 Kouichi Nishimura

× Kouichi Nishimura

en Kouichi Nishimura

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Chika Yokoyama

× Chika Yokoyama

en Chika Yokoyama

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Yoichi Ito

× Yoichi Ito

en Yoichi Ito

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Masaki Nemoto

× Masaki Nemoto

en Masaki Nemoto

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Florence Naaim-Bouvet

× Florence Naaim-Bouvet

en Florence Naaim-Bouvet

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Herve Bellot

× Herve Bellot

en Herve Bellot

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Koji Fujita

× Koji Fujita

en Koji Fujita

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抄録
内容記述タイプ Other
内容記述 Knowledge of snow particle speeds is necessary for deepening our understanding of the internal structures of drifting snow. In this study, we utilized a snow particle counter (SPC) developed to observe snow particle size distributions and snow mass flux. Using high-frequency signals from the SPC transducer, we obtained the sizes of individual particles and their durations in the sampling area. Measurements were first conducted in the field, with more precise measurements being obtained in a boundary layer established in a cold wind tunnel. The obtained results were compared with the results of a numerical analysis. Data on snow particle speeds, vertical velocity profiles, and their dependence on wind speed obtained in the field and in the wind tunnel experiments were in good agreement: both snow particle speed and wind speed increased with height, and the former was always 1 to 2m s(-1) less than the latter below a height of 1 m. Thus, we succeeded in obtaining snow particle speeds in drifting snow, as well as revealing the dependence of particle speed on both grain size and wind speed. The results were verified by similar trends observed using random flight simulations. However, the difference between the particle speed and the wind speed in the simulations was much greater than that observed under real conditions. Snow transport by wind is an aeolian process. Thus, the findings presented here should be also applicable to other geophysical processes relating to the aeolian transport of particles, such as blown sand and soil.
言語 en
書誌情報 en : JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES

巻 119, 号 16, p. 9901-9913, 発行日 2014-08
出版者
言語 en
出版者 AMER GEOPHYSICAL UNION
ISSN
収録物識別子タイプ EISSN
収録物識別子 2169-8996
DOI
関連識別子 10.1002/2014JD021686
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