❓ why
Why do some deserts become very cold at night?
ClimateDeserts
Quick Answer
Dry air and clear skies let heat escape rapidly after sunset. With little water vapour or cloud cover to trap warmth, temperatures can drop fast.
The Full Story
Deserts often lose heat quickly at night because they have very little water vapour, which is one of the main greenhouse gases in the lower atmosphere. Clear skies also allow infrared radiation from the ground to escape into space more easily. Sand and bare rock may heat up fast during the day, but they also cool rapidly after sunset. That is why many deserts have large day-night temperature swings, including hot days and chilly nights.
Key Facts
1.Water vapour helps trap heat near the surface
2.Clear desert skies allow rapid radiative cooling
3.Large day-night temperature ranges are common in deserts
YouTube Angle
Suggested video title for this topic:
"Why can a desert feel like a furnace by day and a freezer by night?"