Water vapor line profile at 183-GHz: Temperature dependence of broadening, shifting, and speed-dependent shape parameters

•First measurement of SD ЫВ broadening and shifting of the 183-GHz water line for self- and air-broadening, and their temperature dependences.•MCRB calculations of the line shape parameters, their temperature and speed-dependence over the range of 200–3000 K agree with measurements.•The impact of the updated spectroscopic parameters on radiative-transfer calculations and atmospheric water-vapor retrievals is calculated.•Consideration of speed-dependence is necessary for accurate atmospheric water vapor profile retrieval with the 183-GHz line.