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Uniform error bounds for fast calculation of approximate Voigt profiles
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering. (VOSIA)ORCID iD: 0000-0002-7018-6248
2021 (English)In: Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN 0022-4073, E-ISSN 1879-1352, Vol. 270, article id 107715Article in journal (Refereed) Published
Abstract [en]

This paper presents uniform error bounds for fast calculation of approximate Voigt profiles that can be useful with the computationally demanding broadband line-by-line analysis of radiative transfer in the atmosphere. Formal proofs are given and rigorous criteria are provided to determine the domain on which the Voigt profile can be approximated by the Lorentz profile within any required accuracy. The most accurate Voigt-implementation to date can then be used to determine the required threshold parameters. Since most of the broadband radiative transfer calculations in the atmosphere will pertain to far wing computations, the potential saving in time is almost the same as by replacing the Voigt computation for the Lorentzian altogether completely. The error bounds can furthermore be used to derive a simple and efficient subband adaptive line selection strategy which can be used to rigorously exclude lines that will contribute to the resulting absorption coefficient less than any given threshold.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 270, article id 107715
National Category
Atom and Molecular Physics and Optics
Research subject
Physics, Waves and Signals
Identifiers
URN: urn:nbn:se:lnu:diva-103483DOI: 10.1016/j.jqsrt.2021.107715ISI: 000662228300003Scopus ID: 2-s2.0-85111021324Local ID: 2021OAI: oai:DiVA.org:lnu-103483DiVA, id: diva2:1556244
Available from: 2021-05-20 Created: 2021-05-20 Last updated: 2022-05-17Bibliographically approved

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Nordebo, Sven

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