Thus, air temperature is low during the night throughout the year with extreme radiational cooling
whenever cloud cover is low (especially in the dry season).
Part of the Kyushu region in southern Japan saw the mercury fall close to freezing point due to the radiational cooling
effects of the cold air, while the agency issued heavy snow warnings for Aomori, Akita and Iwate prefectures in northeastern Japan.
Looking at the starlit night, Pete remembered that if the sky is cloudless, radiational cooling
occurs when warm air escapes the earth.
The agency said the chilly weather was due to a phenomenon called radiational cooling
, which is the cooling of the earth's surface and adjacent air whenever the earth's surface suffers a net loss of heat due to terrestrial radiation.