Official

　Although the remaining heat continues during the day, the air seems to flow in the morning and evening in front of the equinoctial week, and you can feel the sign of autumn.　As there is the word "Heavenly high horse mani Yuru Autumn", it was a season when the sky was high and the air was comfortable.　　　　　　　　　　　　　　　The height of the sun gradually decreases, the amount of solar radiation decreases, the updraft weakens, the convection of the air is less likely to occur, the dust and dust are less in the air, and the air is affected by the high pressure moving from the continent. I hear that the sky looks higher because the air is dry, clear, there are many clouds that can be formed at high places above the sky, and the sky is more visible.　　　　　　　　　　　　　　　　　Clouds that represent autumn are "scale clouds", which are classified as "upper cloud" that occurs at a height of 5 to 13 km above the ground. Like a scale of a fish, it is a popular name for `` Makiku cloud '' in which a cluster of small clouds spread all over the sky. It is also called "Sazanami".　　　　　　　　　　　A similar cloud is a "sheep cloud" that resembles a group of sheep, but this is the common name of "high suzuku cloud" classified as "middle cloud" that occurs at a height of 2 to 7 km above the ground. (Madara) cloud cloud).　　　　　　　　　　　　　In addition, "windows" (commonly known as muscle clouds), which are classified as "upper cloud" as quickly as written with a brush, is one of the clouds that informs you of the coming of autumn.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　The "Autumn Sky" spreads over the Chuo-ohashi Bridge.