The model is suggested to describe the temperature dependence of mm-wave and infrared continua absorption in terms of absorption by weakly bound binary complexes. Present approach is applicable to a mixture of water vapor with various gases. It is shown that accurate consideration of mass action law for (H2O)2 dimers and H2O-N2 , H2O-CO2 , and H2O-Ar complexes allows to reproduce temperature dependencies of continua absorption measured at di!erent wavelengths in mixtures containing various amount of water vapor. The model can be generalized to rigorously account for details of potential energy and dipole surfaces relevant to water-water and water-foreign gas interactions.
Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer:
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Absolute absorption rates of water vapor have been measured in the high-frequency wing of the 183 GHz rotational line. Measurements have been carried out for pure water vapor and mixtures with N2 at atmospheric pressure. Pressure and temperature dependences are compared with models involving different types of lineshapes.
