Self-broadened line parameters for water vapour in the spectral region 5000-5600 cm−1

The self-broadening coefficients and intensities of approximately 460 of the strongest water vapour lines (intensity S ⩾ 1.5 × 10−23 cm molec−1) in the spectral region 5000-5600 cm−1 have been derived from new laboratory measurements. The derived line intensities are on average in a good agreement with those in HITRAN-2001 (v.11.0) (within 0.5% for total band intensity). Self-broadening coefficients are compared with values estimated from the HITRAN-2001 foreign-broadening coefficients. Comparison has been also made with the recent HITRAN-2004 (v.12.0) compilation, which revealed marked systematic differences in the self-broadening coefficients (up to 20%) and in the line intensities (up to 5%). The possible reasons for these deviations are discussed.