Stratospheric chemical and thermal response to long-term variability in solar UV irradiance

Details Stratospheric chemical and thermal response to long-term variability in solar UV irradiance Stratospheric chemical and thermal response to long-term variability in solar UV irradiance

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.7343b&link_type=abstract

Journal of Geophysical Research, vol. 86, Aug. 20, 1981, p. 7343-7362.

Physics

85

Atmospheric Chemistry, Atmospheric Temperature, Solar Activity Effects, Solar Radiation, Solar Terrestrial Interactions, Stratosphere, Ultraviolet Radiation, Atmospheric Composition, Atmospheric Heating, Long Term Effects, Ozone, Photodissociation, Reaction Kinetics, Sunspot Cycle, Two Dimensional Models, Vertical Distribution

Scientific paper

Taking into account the thermal feedback effect on the reaction rates, a theoretical analysis of the chemical response of the stratosphere to the possible long-term variability of solar ultraviolet irradiance is presented. The variability, related to the 11-year solar cycle, is introduced in a two-dimensional stratosphere model simulating the zonally averaged distribution of chemical species related to oxygen, hydrogen, nitrogen and chlorine families. It is found that: (1) a total variation of ozone on the order of 3 percent results from the minimum to the maximum solar activity, with a peak of about 10 percent in the upper stratosphere; (2) at upper stratospheric heights, the calculated temperature change is close to 2-4 deg; and (3) the N2O concentration appears to be one of the most sensitive to long-term solar variability, and is therefore a good candidate for future monitoring.

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