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  1. 防災科研関係論文

Effects of Snowfall on Drifting Snow and Wind Structure Near a Surface

https://nied-repo.bosai.go.jp/records/4185
https://nied-repo.bosai.go.jp/records/4185
06bc989a-7a77-4b12-9355-1a5e6bd8f4d8
Item type researchmap(1)
公開日 2025-03-10
タイトル
言語 en
タイトル Effects of Snowfall on Drifting Snow and Wind Structure Near a Surface
言語
言語 eng
著者 Masaki Nemoto

× Masaki Nemoto

en Masaki Nemoto

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Takeshi Sato

× Takeshi Sato

en Takeshi Sato

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Kenji Kosugi

× Kenji Kosugi

en Kenji Kosugi

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Shigeto Mochizuki

× Shigeto Mochizuki

en Shigeto Mochizuki

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抄録
内容記述タイプ Other
内容記述 Wind-tunnel and numerical experiments were performed to investigate the effects of snowfall on the wind profile and the development of drifting snow. Wind profiles and mass-flux profiles of drifting snow were measured with and without artificial snowfall over a snow surface within the tunnel. Wind and shear-stress profiles and the impact speeds of the snowflakes during snowfall were also investigated numerically. During snowfall, snowflakes transfer part of their horizontal momentum to the air, which increases the stress close to the snow surface; however, the resultant modifications of the wind profiles are small. Because snowflakes have large momentum, the decomposed snow crystals that result from their collision with a surface can form a saltation layer, even over a hard snow surface where entrainment of the grains from the surface does not occur. Additionally, during snowfall, the threshold friction velocity can be lower than the impact threshold because snowflake fragmentation facilitates snow drifting. The broken crystals contribute to the increase in the number of drifting snow grains, even below the impact threshold.
言語 en
書誌情報 en : BOUNDARY-LAYER METEOROLOGY

巻 152, 号 3, p. 395-410, 発行日 2014-09
出版者
言語 en
出版者 SPRINGER
ISSN
収録物識別子タイプ EISSN
収録物識別子 1573-1472
DOI
関連識別子 10.1007/s10546-014-9924-4
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