The update of the line positions and intensities in the line list of carbon dioxide for the HITRAN2020 spectroscopic database

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The update of the line positions and intensities in the line list of carbon dioxide for the HITRAN2020 spectroscopic database

Karlovets, EV; Gordon, IE; Rothman, LS; Hashemi, R; Hargreaves, RJ; Toon, GC; Campargue, A; ... Yurchenko, SN; + view all (2021) The update of the line positions and intensities in the line list of carbon dioxide for the HITRAN2020 spectroscopic database. Journal of Quantitative Spectroscopy and Radiative Transfer , 276 , Article 107896. 10.1016/j.jqsrt.2021.107896. Green open access

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Abstract

This paper describes the updates of the line positions and intensities for the carbon dioxide transitions in the 2020 edition of the HITRAN spectroscopic database. The new line list for all 12 naturally abundant isotopologues of carbon dioxide replaces the previous one from the HITRAN2016 edition. This update is primarily motivated by several issues related to deficient HITRAN2016 line positions and intensities that have been identified from laboratory and atmospheric spectra. Critical validation tests for the spectroscopic data were carried out to find problems caused by inaccuracies in CO2 line parameters. New sources of data were selected for the bands that were deemed problematic in the HITRAN2016 edition. Extra care was taken to retain the consistency in the data sources within the bands. The comparisons with the existing theoretical and semi-empirical databases (including ExoMol, NASA Ames, and CDSD-296) and with available experimental works were carried out. The HITRAN2020 database has been extended by including additional CO2 bands above 8000 cm−1, and magnetic dipole lines of CO2 were introduced in HITRAN for the first time by including the ν2+ν3 band in the 3.3-µm region. Although the main topic of this article is line positions and intensities, for consistency a recent algorithm for the line-shape parameters proposed in Hashemi et al. JQSRT (2020) was reapplied (after minor revisions) to the line list.

Type:	Article
Title:	The update of the line positions and intensities in the line list of carbon dioxide for the HITRAN2020 spectroscopic database
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1016/j.jqsrt.2021.107896
Publisher version:	https://doi.org/10.1016/j.jqsrt.2021.107896
Language:	English
Additional information:	This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords:	Carbon dioxide, CO2 line lists, HITRAN2020, Spectroscopic line parameters
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI:	https://discovery.ucl.ac.uk/id/eprint/10135316