The photochemical effects of dynamically induced variations in solar insolation

Details The photochemical effects of dynamically induced variations in solar insolation The photochemical effects of dynamically induced variations in solar insolation

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63..781s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 8, p. 781-797.

Physics

5

Scientific paper

In this paper, the question of what happens when an air parcel in which photochemical processes take place moves around the earth with a certain velocity is considered. When the characteristic chemical system time corresponds to the rotation period of the earth (1 day) an influence of the diurnal variation of the chemical constituents on the zonal wind is found. We term this finding the zonal wind effect on the photochemistry (ZWEPC). The period of forcing of the chemical system within the air parcel changes depending on the direction and strength of the zonal wind. The alteration of the respective frequency has been described by a modified Doppler formula. A remarkable influence of the zonal wind on the photochemistry was found in the upper mesosphere//mesopause region where the characteristic chemical system time ranges in the order of one day and the system represents a nonlinear chemical oscillator which is able to create nonlinear effects such as subharmonics. The zonal wind influences such magnitudes as the occurring time of the daytime ozone maximum or the diurnal amplitude of atomic hydrogen and others. As the zonal wind changes with season the ZWEPC has to be taken into consideration when interpreting observations.

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