Air-broadening of H2O as a function of temperature:: 696-2163 cm-1

The temperature dependence of air-broadened half-widths are reported for some 500 transitions in the (000)-(000) and (010)-(000) bands of (H2O)-O-16 using gas sample temperatures ranging from 241 to 388 K. These observations were obtained from infrared laboratory spectra recorded at 0.006-0.011 cm(-1) resolution with the McMath-Pierce Fourier transform spectrometer located at Kitt Peak. The experimental values of the temperature dependence exponents, eta, were grouped into eight subsets and fitted to empirical functions in a semi-global procedure. Overall, the values of eta were found to decrease with increasing rotational quantum number J. The number of measurements (over 2200) and transitions (586) involved exceeds by a large margin that of any other comparable reported study. (C) 2005 Elsevier Ltd. All rights reserved.