Self-broadened line parameters for water vapour in the spectral region 5000-5600 cm |
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Authors: | Igor V. Ptashnik Kevin M. Smith |
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Affiliation: | a Department of Meteorology, The University of Reading, Earley Gate, Reading RG6 6BB, UK b Space Science and Technology Department, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, UK |
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Abstract: | 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. |
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Keywords: | HITRAN database Line parameters fitting Apodization |
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