J. Phys. Colloques
Volume 41, Numéro C9, Novembre 1980Third International Symposium on Gas-Flow and Chemical Lasers
|Page(s)||C9-101 - C9-105|
J. Phys. Colloques 41 (1980) C9-101-C9-105
CO2 - LASER RADIATION ABSORPTION IN 1000 CM-1 WATER VAPOR CONTINUUMV.N. Aref'ev1, N.I. Sizov1, V.I. Dianov-Klokov2 et V.M. Ivanov2
1 Institute of Experimental Meteorology, Obninsk, U.S.S.R.
2 Institute of Atmospheric Physics, Moscow, U.S.S.R.
Water vapor absorption of CO2-laser radiation at R 40, R 10, P 20, P 32 lines of the 10.4µ band and R 10, R 18, R 44 lines of the 9.4µ band has been investigated in the laboratory. The results obtained are compared with the measurements of 10-13µ solar radiation attenuation. The experimental facts strongly support the assumption that water dimers play an important role in the 8-13µ region. The analysis of field and laboratory experiments allow the following conclusion : under most meteorological conditions occuring in a cloudless atmosphere the continuum absorption by water vapor must be taken into account in the CO2 - laser radiation absorption. Estimates of the attenuation can be successfully obtained by making use of approximate expressions deduced from the laboratory data.