Solar absorption in a stratosphere perturbed by NO/x/ injection

Computer Science

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Gas Injection, Nitrogen Oxides, Ozone, Solar Energy Absorbers, Stratosphere, Ultraviolet Absorption, Atmospheric Heating, Molecular Absorption, Nitrogen Dioxide, Radiation Absorption, Radiative Transfer, Solar Heating

Scientific paper

Solar absorption in a stratosphere perturbed by the injection of oxides of nitrogen is investigated using a radiative transfer model assuming a cloudless, plane-parallel atmosphere in which there is molecular multiple scattering and gaseous absorption above an isotropically scattering ground. NO2 injection at the rate of 2000 molecules/cu cm/sec at 17 or 20 km is considered. Changes in solar absorption by NO2 and O3 are found to be complementary, although the NO2 absorption is only a small fraction of the O3 absorption for an unperturbed atmosphere. The most significant factor contributing to this effect is that the fractional increase in the NO2 column density is about six times the fractional decrease in the O3 column density. In addition, the fractional change in O3 absorption is about 0.6 times that in the O3 column density as the result of saturation of the O3 absorption in the Hartley band. An analysis of the perturbed solar radiation budget is given.

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