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A. Ghazi and J. J. Becker

Abstract

Instead of measuring total ozone by observing the direct sun (if visible) or at the zenith, photometric measurements of sky radiation were made in the solar vertical. The newly developed spectrophotometer uses filters and a photomultiplier as the light sensor.

Applying a theoretical model of the atmosphere as a primary reduction parameter, the measured spectral intensifies of skylight are compared to deduce total ozone amount. Preliminary results show fair correlation with the ozone values obtained by the Dobson spectrophotometer, the standard instrument.

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A. Ghazi, Pi-Huan Wang, and M. P. McCormick

Abstract

Satellite ozone observations made by the Stratospheric Aerossol and Gas Experiment (SAGE) and corresponding meteorological temperature data are used to study the radiative damping processes associated with planetary waves during stratospheric warmings. Ramanathan's model has been adapted fox. the radiative heating and cooling calculations. The derived infrared damping coefficients, based on observed stratospheric ozone and temperature, are compared with the Newtonian cooling coefficients of Dickinson and Fels. It is also shown that the negative correlation between temperature and ozone solar heating in the upper stratosphere accelerates the damping rate due to infrared cooling alone, in agreement with the theoretical analysis and an earlier report based on observations. In addition, it is also found in this analysis that the phase relationship between ozone and solar heating waves is characterized by its behavior in three distinct layers. In the regions above about 2 mb and also below about 10 mb, the waves are closely in-phase. Between approximately 2 and 10 mb, they show a departure from the in-phase relationship which can be attributed to the so-called “opacity effect.” This effect significantly determines the magnitude of radiative damping.

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