2017 Volume 12 Issue 2 Pages 209-216
Original meteorological observations and analysis of wind and temperature were conducted on the midslope of Mt. Rokko, in Kobe, Japan, from July to November 2016 to investigate the cooling effect of cold air drainage. In the middle of the mountainside, stable northerly winds start to blow regularly after 15:00, and the temperature suddenly decreases sharply by 4–5°C. This northerly wind is a cold airflow, which continues from 15:00 to 07:00, with an average wind speed of about 1 to 2 m/s. It was clarified that cold air drainage occurs on the midslope of Mt. Rokko during the time when an extended sea breeze predominates in the greater Kobe area and that a local circulation pattern is formed which differs from the prevailing pattern in Kobe.
