Abstract
The purpose of this report is to show the distribution and time progress of the temperature and relative humidity of fine weather days in summer in the southern part of the Hida mountain range. The author installed meteorological recorders in summer in the years 1999, 2000 and 2001. The number of observation places were four or eight. The recorders observed at intervals of ten minutes. And the data of recorders were received by computer. The summary of the result is as follows: (1) According to the observations at Mt. Kasaga-take and Mt. Kurobegorou-dake, inversion layers appeared at the foot of mountains and at the middle of mountain slopes. There are two kinds of the inversion layers. First, the type of the foot of mountains appeared before daylight and disappeared on the morning. The time of disappearance corresponds with the time of shift of mountain wind and valley wind. Secondly, the type of the middle of mountain slopes appeared at daytime. (2) According to the observations of summits of four mountains (Mt. Sugoroku-dake, Mitsumatarenge-dake, Kurobegorou-dake and Yakushi-dake in order from the south), the following results are obtained. A sharp rise of temperature and a sharp fall of relative humidity began earlier in the morning as the mountains of the south in comparison with the mountains of the north.
