Mahlman, J. D., 1973: Preliminary results from a three-dimensional, general-circulation/tracer model. In Proceedings of the Second Conference on the Climatic Impact Assessment Program, Department of Transportation Report, No. DOT-TSC-OST-73-4, 321-337.

Abstract: Some initial results from a three-dimensional tracer model are presented. The tracer model uses time-evolving, three-dimensional output from the general-circulation model described by Mahlman and Manabe. In the tracer integrations, three-dimensional advection and horizontal sub-grid-scale diffusion are calculated. Arbitrary parameterizations of sources and sinks can be included. The advective terms and time differencing are formulated so as to suppress artificial numerical damping.
Currently, two major experiments are being conducted. The first is a diffuse point-source injection into the Northern Hemisphere, mid-latitude winter stratosphere. The other is a vertically stratified tracer with a crudely simulated photochemical equilibrium at the upper level and a precipitation-dependent sink at the lowest levels.
The results of both experiments show many similarities to the behavior of analagous stratospheric trace substances. The first experiment shows features close to those of radioactive debris from recent Chinese bomb tests. The second experiment exhibits many features in common with those of observed ozone.