Approximate Absorption Cross Sections of F12, F11, ClONO2, N2O5, HNO3, CCl4, CF4, F21, F113, F114, and HNO4

摘要

The technical note displays approximate absorption cross sections for selected infrared bands of F12 (CF2Cl2), F11 (CFCl3), ClONO2, N2O5, HNO3, CCl4, CF4, F21 (CHCl2F), F113 (C2Cl3F3), F114 (C2Cl2F4), and HNO4. These species play active roles in the chemistry and radiation budgets of the troposphere and stratosphere, but are difficult to analyze on a line-by-line basis. Indeed, with the exception of line parameters of some of the HNO3 bands on the 1982 AFGL catalog, high resolution spectral parameters are not available for any of the bands presented here. The cross sections were derived from analysis of laboratory transmission data acquired at the University of Denver. Each cross section was obtained by dividing the natural log of the transmittance by the negative of the column density.