The temperature dependences of the integrated intensities of the absorption bands of H2O, H2S, SO2, and NO2

In this work the temperature dependences of the integrated intensities of the absorption bands of the asymmetric top molecules – H 2 O, H 2 S, SO 2 , and NO 2 were analyzed. A different view of the temperature dependences was shown for cold bands including fundamental ones. For calculating the integrated intensities, the spectral line intensities were used from the known and author’s spectroscopic databases. The reasons are discussed which lead to increasing and decreasing the integrated intensities at high temperatures (T>300 K).