|
|
The thundercloud which shines with the setting sun. Such thunderclouds may be seen in summer. Although the air which is tinged with humidity warms and goes up with the heat of surface of the earth, if development of a thundercloud goes up above to some extent, it will be cooled by cold air of 0 degrees or less high up in the sky. Since moisture in the air will reach saturation early more if temperature falls in moisture in the air cooled with air of 0 degrees or less, it is saturated and waterdrop is made among clouds, These are cooled and it begins to hail. While it is going to fall since it is heavy, but there is an intense ascending current, the lump of ice, such as hail made by being cooled, cannot fall, but moves up and down violently. It seems that thunder is charged while the lump of this cooled hail and ice moves up and down and collides, and a thunderbolt will occur if that limit exceeds regularity. Moreover, what a thundercloud will develop from easily if the cold enters high up in the sky is considered to be because for the air which went up early more to be cooled. |