Infrared radiation models for atmospheric ozone

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Abstract
A hierarchy of line‐by‐line, narrow‐band and broadband infrared radiation models are discussed for ozone, a radiatively important atmospheric trace gas. It is shown that the narrow‐band (Malkmus) model is in near‐precise agreement with the line‐by‐line model, thus providing a means of testing narrow‐band Curtis‐Godson scaling, and it is found that this scaling procedure leads to errors in atmospheric fluxes of up to 10%. Moreover, this is a direct consequence of the altitude dependence of the ozone mixing ratio. Somewhat greater flux errors arise with use of the broadband model, due to both a lesser accuracy of the broadband scaling procedure and to inherent errors within the broadband model, despite the fact that this model has been tuned to the line‐by‐line model.

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