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  1. 防災科研関係論文

Interannual fluctuations of the relationship between winter precipitation and air temperature in the heavy-snowfall zone of Japan

https://nied-repo.bosai.go.jp/records/5734
https://nied-repo.bosai.go.jp/records/5734
56e13005-02f1-40d3-9a7d-e6f8f0dbe951
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Interannual fluctuations of the relationship between winter precipitation and air temperature in the heavy-snowfall zone of Japan
言語
言語 eng
著者 Satoru Yamaguchi

× Satoru Yamaguchi

en Satoru Yamaguchi

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Katsushi Iwamoto

× Katsushi Iwamoto

en Katsushi Iwamoto

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Sento Nakai

× Sento Nakai

en Sento Nakai

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抄録
内容記述タイプ Other
内容記述 Regions of Japan facing the Sea of Japan have some of the world's deepest seasonal snowpack, although air temperatures averaged over the coldest winter months (January February) are above 0 degrees C in this mid-altitude zone (35-40 degrees N). Therefore, even a slight temperature increase is likely to drastically decrease the snow depth in this area by changing the precipitation form from snow to rain. In this study, to enhance understanding of winter precipitation conditions, we introduce the winter precipitation curve (WPC), which plots the distribution of winter precipitation (December February) against the corresponding air temperature using hourly data. We then examine the relationship between the WPC and regional climate conditions. The WPC was classified into two types in the study: the single-peak (SP) type, having one sharp peak near 0 degrees C, and the multiple-peaks (MP) type, having several small peaks. Here 'peak' indicates that precipitation frequently occurs at a certain temperature. Peaks of the MP type changed position with fluctuations in mean winter temperature, but the peak of the SP type moved only slightly despite annual fluctuations in winter mean temperature. One of the multiple peaks of the MP type appeared at 0 degrees C and this peak also remained nearly stationary with fluctuations in winter mean temperature. The peak of the WPC appearing near 0 degrees C in both the SP and MP types likely resulted from the development of the 0 degrees C isothermal layer due to the cooling effect of melting snow particles.
言語 en
書誌情報 en : ANNALS OF GLACIOLOGY

巻 54, 号 62, p. 183-188, 発行日 2013
出版者
言語 en
出版者 CAMBRIDGE UNIV PRESS
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 10.3189/2013AoG62A302
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