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  1. 防災科研関係論文

Development of a handheld integrating sphere snow grain sizer (HISSGraS)

https://nied-repo.bosai.go.jp/records/6557
https://nied-repo.bosai.go.jp/records/6557
b9db42ea-1c7f-4ee5-aa5c-5ce97f160222
Item type researchmap(1)
公開日 2025-04-14
タイトル
言語 en
タイトル Development of a handheld integrating sphere snow grain sizer (HISSGraS)
言語
言語 eng
著者 Teruo Aoki

× Teruo Aoki

en Teruo Aoki

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Akihiro Hachikubo

× Akihiro Hachikubo

en Akihiro Hachikubo

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Motoshi Nishimura

× Motoshi Nishimura

en Motoshi Nishimura

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Masahiro Hori

× Masahiro Hori

en Masahiro Hori

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Masashi Niwano

× Masashi Niwano

en Masashi Niwano

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Tomonori Tanikawa

× Tomonori Tanikawa

en Tomonori Tanikawa

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Konosuke Sugiura

× Konosuke Sugiura

en Konosuke Sugiura

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Ryo Inoue

× Ryo Inoue

en Ryo Inoue

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Satoru Yamaguchi

× Satoru Yamaguchi

en Satoru Yamaguchi

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Sumito Matoba

× Sumito Matoba

en Sumito Matoba

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Rigen Shimada

× Rigen Shimada

en Rigen Shimada

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Hiroshi Ishimoto

× Hiroshi Ishimoto

en Hiroshi Ishimoto

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Jean-Charles Gallet

× Jean-Charles Gallet

en Jean-Charles Gallet

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抄録
内容記述タイプ Other
内容記述 We developed a Handheld Integrating Sphere Snow Grain Sizer (HISSGraS) for field use to measure the specific surface area (SSA) of snow. In addition to snow samples, HISSGraS can directly measure snow surfaces and snow pit walls. The basic measurement principle is the same as that of the IceCube SSA instrument. The retrieval algorithm for SSA from reflectance employs two conversion equations formulated using spherical and nonspherical grain shape models. We observed SSAs using HISSGraS, IceCube and the gas adsorption method in a snowfield in Hokkaido, Japan. Intercomparison of the results confirmed that with HISSGraS direct measurement, SSA profile observations can be completed in just ~1/10 the time required for measurement of snow samples. Our results also suggest that HISSGraS and IceCube have similar accuracy when the same snow samples are measured using the same grain shape model. However, SSAs of near-surface snow layers measured using the three techniques exhibited some biases, possibly due to rapid snow metamorphism or melting during measurement and some technical issues with optical techniques. When excluding SSA data for the surface layer, which metamorphosed remarkably during measurement, IceCube- and HISSGraS-derived SSAs correlated strongly with those obtained by gas adsorption and HISSGraS accuracy is 21–34%.
言語 en
書誌情報 en : Annals of Glaciology

巻 65, p. 1-12, 発行日 2023-11-29
出版者
言語 en
出版者 Cambridge University Press (CUP)
ISSN
収録物識別子タイプ EISSN
収録物識別子 1727-5644
DOI
関連識別子 10.1017/aog.2023.72
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