著者

今 久 洪 聖善 松岡 延浩

出版者

The Society of Agricultural Meteorology of Japan

雑誌

農業気象 (ISSN:00218588)

巻号頁・発行日

vol.52, no.3, pp.241-245, 1996-09-10 (Released:2010-02-25)

参考文献数

4

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An experiment was conducted to see how much the air temperature on the ground was cooled by the cooling of soil surface due to local watering. The day was fine and the soil was very dry, so the temperature of soil surface amounted to more than 50°C. But it was cooled by 20°C due to watering. The cooling of soil surface cooled the air on the ground. In the case of watering from 5cm radius to 5m radius, the cooling effect of soil surface attained to higher air layer according to the increase of watering radius. The height influenced: z (cm) was represented by the power function with the watering radius: r (cm). The relation is represented as the following function, z=(r/6.39)1.03The air on the ground was cooled by 6°C at the 1cm height and by 3°C at 10cm height by the watering of 5m radius. The cooling degree of the air temperature at each height was represented by the logarithmic function of the height.