Impact of water vapor continuum absorption on carbon dioxide radiative forcing at upper and bottom boundaries of the atmosphere in Lower Volga Region

The longwave radiative fluxes in the cloudless atmosphere are calculated for meteorological conditions of Lower Volga Region. The radiative forcing due to CO2 concentration increase for the latest 50 years is estimated. Modern models of water vapor continual absorption in the 3-5 and 8-12 􀁐m atmospheric transparency windows are compared. It is shown that the H2O continual absorption reduces the CO2 radiative forcing in case of high concentrations of atmospheric water vapor.