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[HGG01-P08] The relationship between tea cultivation and winter nighttime winds blowing in Haneda-machi, Komatsu City, Ishikawa, JAPAN
Keywords:local wind, ground inversion layer, meteorological resource, tea cultivation, Komatsu City, Ishikawa Prefecture
In the area around Haneda-machi, Komatsu City, Ishikawa Prefecture, there is an early morning wind that blows from the mountains in the wintertime. In other areas, the nighttime and early morning mountain winds in winter are utilized as a meteorological resource. This is due to a phenomenon in which the ground inversion layer generated by the radiative cooling phenomenon is broken and the temperature rises in areas where downslope winds from mountains and valleys blow strongly during clear nights. In Haneda-machi, Komatsu City, tea cultivation, which is greatly affected by frost damage, has been actively conducted in the area.
In this study, to investigate the relationship between winter winds from the mountains and tea cultivation in Haneda-machi, Komatsu City, we conducted observations using an automatic meteorological observation device at a site where tea trees still remain in the area. The results showed that winds with an unusual southeasterly component were observed during the nighttime when a strong radiative cooling phenomenon was occurring in Haneda-machi, Komatsu City.
In order to elucidate the mechanism of this wind, a numerical simulation experiment was conducted using WRF (Weather Research and Forecasting), a regional meteorological model developed by NCAR (National Center for Atmospheric Research). The simulation experiments suggest that the winds blowing in Haneda-machi, Komatsu City, are downslope winds from the mountains around Hitomoshi-mountain, which straddle the border between Komatsu City and Hakusan City in Ishikawa Prefecture, and winds blowing from the valley south of Hitomoshi-mountain.
The present study indicates that the winds that break the grounding inversion layer and bring warming to Haneda-machi, Komatsu City, during clear nights in winter. This wind was a meteorological resource for tea cultivation in Haneda-machi, Komatsu City, because it suppressed the frost damage. The wind is one of the factors that contributed to the development of tea cultivation in Haneda-machi, Komatsu City, and is considered to have played a role as a meteorological resource.
The study and discovery of natural environments that have been lost or unrecognized for local use, such as those obtained by linking the natural environment of wind and local industry, can be a source of wisdom and technology for living in a sustainable society. It is necessary to study and recognize the small differences in weather in each region, and to make use of the parts that can be utilized, and it is expected that weather resources will be utilized more by incorporating various methods of utilization in the future.
In this study, to investigate the relationship between winter winds from the mountains and tea cultivation in Haneda-machi, Komatsu City, we conducted observations using an automatic meteorological observation device at a site where tea trees still remain in the area. The results showed that winds with an unusual southeasterly component were observed during the nighttime when a strong radiative cooling phenomenon was occurring in Haneda-machi, Komatsu City.
In order to elucidate the mechanism of this wind, a numerical simulation experiment was conducted using WRF (Weather Research and Forecasting), a regional meteorological model developed by NCAR (National Center for Atmospheric Research). The simulation experiments suggest that the winds blowing in Haneda-machi, Komatsu City, are downslope winds from the mountains around Hitomoshi-mountain, which straddle the border between Komatsu City and Hakusan City in Ishikawa Prefecture, and winds blowing from the valley south of Hitomoshi-mountain.
The present study indicates that the winds that break the grounding inversion layer and bring warming to Haneda-machi, Komatsu City, during clear nights in winter. This wind was a meteorological resource for tea cultivation in Haneda-machi, Komatsu City, because it suppressed the frost damage. The wind is one of the factors that contributed to the development of tea cultivation in Haneda-machi, Komatsu City, and is considered to have played a role as a meteorological resource.
The study and discovery of natural environments that have been lost or unrecognized for local use, such as those obtained by linking the natural environment of wind and local industry, can be a source of wisdom and technology for living in a sustainable society. It is necessary to study and recognize the small differences in weather in each region, and to make use of the parts that can be utilized, and it is expected that weather resources will be utilized more by incorporating various methods of utilization in the future.