Radiational cooling is the cooling of the
Earth's surface through
thermal radiation in the
infrared frequency. Although our
eyes are not sensitive to IR, we can feel changes in temperature. The invisible effect of radiational cooling is ongoing day and night, however; we only notice the drop in
temperature at night when there is no solar heating to mask the effect. Radiational cooling is especially noticeable in clear sky conditions when the effect is most pronounced.
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