Temperature inversion layer

Japanese: 気温逆転層 - きおんぎゃくてんそう（英語表記）temperature inversion layer

When looking at the vertical distribution of temperature, it generally shows a decrease in temperature the higher it gets, but when warm air overlaps with cold air, a temperature inversion occurs. The atmospheric layer where the temperature is inverted is called a temperature inversion layer. Temperature inversions occur at frontal surfaces and in the stratosphere. Also, near the ground, the temperature drops the closer to the ground due to radiative cooling that occurs at night on clear days, creating a temperature inversion layer. This is called a surface inversion layer, and it begins after sunset and is most noticeable in the early morning. After sunrise, it weakens as the turbulence increases, and usually resolves after a few hours.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

気温の鉛直分布を見ると一般には上空ほど低く逓減を示すが，暖かい空気が冷たい空気の上に重なるときは気温逆転が生ずる。気温が逆転している大気層を気温逆転層という。前線面や成層圏では気温逆転となっている。また地面近くでは，晴天日の夜間に起こる放射冷却によって地面に近いほど気温が下がり気温逆転層が生ずる。これを接地逆転層といい，日没後に始まり早朝に最も顕著となり，日の出後，乱れが増すとともに弱まり，数時間して解消するのが普通である。

出典　株式会社平凡社世界大百科事典第２版について　情報

<<: Temperature lapse rate

>>: Gion