= Umkehr effect
{wiki=Umkehr_effect}
The Umkehr effect, also known as the "Umkehr phenomenon," refers to a specific spectral phenomenon in atmospheric science relating to the absorption of solar radiation by atmospheric gases, particularly ozone. The term "Umkehr" is derived from the German word meaning "reversal." This effect occurs during the scattering and absorption processes of sunlight in the atmosphere, where the distribution of ozone alters the vertical profile of solar radiation.
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