atmospheric ‘window’ The range of wavelengths (about 8.5–11 μm) at which radiation is only slightly absorbed by water vapour. Terrestrial radiation within this range may escape into space unless it is absorbed by cloud (water droplets can absorb in this range). See also ‘greenhouse effect’ and terrestrial radiation.

atmospheric ‘window’ The range of wavelengths (about 8.5–11 μm) at which radiation is only slightly absorbed by water vapour. Terrestrial radiation within this range may escape into space unless it is absorbed by cloud (water droplets can absorb in this range). See also GREENHOUSE EFFECT; and TERRESTRIAL RADIATION.