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  1. 学術雑誌掲載済論文
  2. 洋雑誌

Measurement of specific surface area of fresh solid precipitation particles in heavy snowfall regions of Japan

https://kitami-it.repo.nii.ac.jp/records/2000422
https://kitami-it.repo.nii.ac.jp/records/2000422
dd2b54e6-9905-438b-afaa-80318fb72293
名前 / ファイル ライセンス アクション
tc-13-2713-2019(1).pdf tc-13-2713-2019(1).pdf (10.2 MB)
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Item type 学術雑誌論文 / Journal Article(1)
公開日 2023-04-20
タイトル
言語 en
タイトル Measurement of specific surface area of fresh solid precipitation particles in heavy snowfall regions of Japan
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Satoru Yamaguchi

× Satoru Yamaguchi

en Satoru Yamaguchi

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Masaaki Ishizaka

× Masaaki Ishizaka

en Masaaki Ishizaka

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Hiroki Motoyoshi

× Hiroki Motoyoshi

en Hiroki Motoyoshi

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Sent Nakai

× Sent Nakai

en Sent Nakai

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Vincent Vionnet

× Vincent Vionnet

en Vincent Vionnet

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Teruo Aoki

× Teruo Aoki

en Teruo Aoki

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Katsuya Yamashita

× Katsuya Yamashita

en Katsuya Yamashita

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Akihiro Hashimoto

× Akihiro Hashimoto

en Akihiro Hashimoto

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抄録
内容記述タイプ Abstract
内容記述 In countries like Japan, particular solid precipitation particles (PPs), such as unrimed PPs and graupel, often form a weak layer in snow, which triggers slab avalanches. An understanding of weak PP layers is therefore essential for avalanche prevention authorities to design a predictive model for slab avalanches triggered by those layers. Specific surface area (SSA) is a parameter that could characterize the physical properties of PPs. The SSAs of solid PPs in Nagaoka – a city in Japan experiencing the heaviest snowfall in the country – were measured for four winters (from 2013/2014 to 2016/2017). More than 100 SSAs of PP were measured during the study period using the gas absorption method. The measured SSA values range from 42 to 153 m2 kg−1. Under melting conditions, PPs showed comparatively smaller values. Unrimed and slightly rimed PPs exhibited low SSA, whereas heavily rimed PPs and graupel exhibited high SSA. The degree of PP riming depends on the synoptic meteorological conditions. Based on the potential of weak PP layer formation with respect to the degree of riming of PPs, the results indicate that SSA is a useful parameter for describing the characteristics of PP, and consequently predicting avalanches triggered by weak PP layers. The study found that the values of SSA strongly depend on wind speed (WS) and wet-bulb temperature (Tw) on the ground. SSA increases with increase in WS and decreases with increase in Tw. An equation to empirically estimate the SSA of fresh PPs in Nagaoka using WS and Tw was established. The equation successfully reproduced the fluctuation of SSA. The SSA equation, along with the meteorological data, is an efficient first step toward describing the development of weak PP layers in the snow cover models.
言語 en
書誌情報 en : The Cryosphere

巻 13,, p. 2713-2732, 発行日 2019-10
DOI
識別子タイプ DOI
関連識別子 https://doi.org/10.5194/tc-13-2713-2019
権利
言語 en
権利情報 © Author(s) 2019
出版者
言語 en
出版者 Copernicus Publications on behalf of the European Geosciences Union.
著者版フラグ
言語 en
値 publisher
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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