Intensities and self-broadening coefficients of the strongest water vapour lines in the 2.7 and 6.25μm absorption bands

Ptashnik, I. V., McPheat, R., Polyansky, O. L., Shine, K. P. ORCID: https://orcid.org/0000-0003-2672-9978 and Smith, K. M. (2016) Intensities and self-broadening coefficients of the strongest water vapour lines in the 2.7 and 6.25μm absorption bands. Journal of Quantitative Spectroscopy and Radiative Transfer, 177. pp. 92-107. ISSN 00224073 doi: 10.1016/j.jqsrt.2016.02.001

Abstract/Summary

Intensities and self-broadening coefficients are presented for about 460 of the strongest water vapour lines in the spectral regions 1400–1840 cm−1 and 3440–3970 cm−1 at room temperature, obtained from rather unique measurements using a 5-mm-path-length cell. The retrieved spectral line parameters are compared with those in the HITRAN database ver. 2008 and 2012 and with recent ab-initio calculations. Both the retrieved intensities and half-widths are on average in reasonable agreement with those in HITRAN-2012. Maximum systematic differences do not exceed 4% for intensities (1600 cm−1 band) and 7% for self-broadening coefficients (3600 cm−1 band). For many lines however significant disagreements were detected with the HITRAN-2012 data, exceeding the average uncertainty of the retrieval. In addition, water vapour line parameters for 5300 cm−1 (1.9 μm) band reported by us in 2005 were also compared with HITRAN-2012, and show average differences of 4–5% for both intensities and half-widths.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/55564
Identification Number/DOI	10.1016/j.jqsrt.2016.02.001
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
Publisher	Elsevier
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