流域圏学会誌，第3巻 第1号，pp.33-40 (2015)

高知県中部の日降水量頻度分布に現れる気候データ解像度の標高依存性

横山　正樹，西森　基貴

Elevation dependency of spatial resolution of climate data in daily precipitation distribution in the middle area of Kochi

Masaki YOKOYAMA and Motoki NISHIMORI
National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, 305-8604, Japan

Abstract

Recently, climate models have been developed on spatial resolution. Although it is getting possible to analyze on river basin scale, we should understand model characteristics because of uncertainties of climate models. We analyzed the relationship between extreme daily precipitations and elevation by using daily precipitation data taken from observations and climate models. The results show as follows: (1) Daily precipitation distributions of data set with higher spatial resolution would approach to observational value. (2) Relationship between data set resolution and extreme daily precipitations has elevation dependency. (3) In case of higher resolution, extreme daily precipitations have a tendency to be suppressed more strongly at higher elevation.

Key words: Climate model, Spatial resolution, Extreme daily precipitation

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