Abstract: Variations in global photodissociation rates in the troposphere are calculated and the consequences of these variations for tropospheric chemistry are examined. Most of the variations are due to the effects of clouds, surface reflection and stratospheric ozone. Parameterizations are developed and they permit the photodissociation rates to be calculated rapidly as a function of these three factors. The errors introduced by using the parameterization are considered to be acceptable in view of the uncertainty in the data available. The daily-integ...
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Topics: 
Atmospheric sciences
Climatology