Water vapor continuum absorption in the 2.7 and 6.25 μm bands at decreased temperatures

Abstract

High-resolution Fourier transform spectroscopy laboratory measurements of pure water vapor absorption have been performed for the first time at temperatures from–9 to 15°С in the near-IR spectral region. As the result, the water vapor continuum absorption is retrieved within 1600 and 3600 cm^–1 absorption bands (6.25 and 2.7 μm, respectively). Spectral features of the continuum retrieved at 15°С are in good agreement with the known data. It is shown that different spectral peaks of the continuum have different temperature dependencies.