ABSORPTION-SPECTRA OF HCFC-22 AROUND 829 CM(-1) AT ATMOSPHERIC CONDITIONS

Spectral absorption coefficients, which are also known as absorption cross-sections k(v)(cm-1 atm-1), of HCFC-22 have been measured around 829 cm-1 in the laboratory at various temperature-pressure combinations chosen to represent tangent heights (as in solar-occultation occultation experiments) or layers in the atmosphere. The k(v) data measured employing the Doppler-limited spectral resolution (approximately 10(-4) cm-1) of a tunable diode laser spectrometer are free of instrumental distortion and are more practical in this case than the spectral line parameters adapted in conventional line-by-line procedures for analysing atmospheric spectra. The present data obtained with N2, as the broadening gas are shown to be directly applicable to the real atmosphere.