ber Die Absorptions- Und Emissionsstrahlung Der Atmosph rischen Ozonschicht Bei Der Wellenl nge 9,6 μ

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The apparatus consists of a coelostat and an infrared spectrometer coupled with an appropriate am- plifier, mechanical rectifier and arecorder. The coelostat was constructed for use at stations of different geographical latitude. With this apparatus the emission spectra of the sun and the earth's atmosphere between 8 IJ. and 111J. wave-length were measured on clear days at different zenith angles of the sun and the percentage absorp- tion and emission, respectively, of the atmospherical ozone layer were computed. Assuming the validity of the Lambert-Beer law the measured atmospherical transmission yielded the product of the absorption coefficient Ci and the total amount of ozone x; is a mean absorption coeff- cient. In the infrared the absorption coefficient is a function of pressure P and hence of the height h above the ground. Imagine the atmosphere up to a height of 50 km to be divided into any given number of homo- geneous layers, the absorption in each layer depends upon the respective absorption coefficient (Xi and the amount of ozone xi . A summation over all layers yields the total absorption which depends on the to- tal amount of ozone x and on a mean absorption coefficient Ci. This mean absorption coefficient is defined by the equation It was shown that ii is sufficiently constant even in consideration of the seasonal variations of the total amount of ozone x . Therefore, it was possible to derive the total amount of ozone x from the measured products ii . x.