Click on the file of your choice to download the original Polymath archive or PDF archive for the Ozone Depletion problem and the Challenge problem. Feel free to change the initial conditions to gain more understanding about this Web Module case.

Model_chlorine.pol - This file includes all of the differential equations, rate coefficients, and initial concentrations of the chlorine model, for a time run of 1000 s. You will need to change the initial chlorine concentration to solve Part 2 of the Problems section.

Model.pol - This file includes all of the differential equations, rate coefficients, and initial concentrations of the chlorine + nitrogen oxides + bromine model, for a time run of 7000 s.

Equations_chlorine.pdf - This file includes a step-by-step procedure of the PSSH applied to the chlorine model, from the original algebraic expression of consumption/production to the final differential equations per species.

Equations.pdf - This file includes a step-by-step procedure of the PSSH applied to the chlorine + nitrogen oxides + bromine model, from the original algebraic expression of consumption/production to the final differential equations per species.