Solar Spectral Irradiance and Surface Ozone Changes at Carrollton, Georgia during the Great American Eclipse on August 21, 2017

Measurements of solar spectral irradiance and surface ozone at the University of West Georgia, Carrollton, during the Great American eclipse on August 21$^{\mathrm{st}}$, 2017, indicated changes in spectral irradiance and ozone surface concentration. The integrated spectral irradiance in defined wavelength ranges in the ultraviolet (300 -- 390 nm) and visible (391 -- 700 nm) reached a minimum at the maximum obscuration (\textasciitilde 95{\%}) of the sun, whereas in an infrared range (701 -- 1040 nm) reached a maximum. The method of analysis of observational data vividly displayed this effect originating mainly due to limb darkening. In the surface ozone measurement, a minimum in ozone concentration occurred thirty minutes after the instant of maximum obscuration. The observation is explained as a result of the kinetics of photo-chemical creation of ozone and its photo-chemical and non-photochemical degradation.