Technical Discussion Related to the Choice of Photolytic Rates for Carbon Bond Mechanisms in OZIPM4/EKMA

摘要

The report proposes to explain the methods, and to identify the sources of information used to calculate photolytic rates, for the chemical models Carbon Bond III (CB3) and Carbon Bond IV (CB4) for use in the OZIPM3 and OZIPM4 oxidant modeling programs. The mixed layer photolytic rates described in Chapter 4 are also the default rates for CB4 in the OZIPM4 program, expected to be used in new State Implementation Plan calculations. The report also reviews previous recommendations for photolytic rates used in the original OZIPP program and in the revised program OZIPM2.