New data and analysis for SF6 absorption modelling in the 10 micron atmospheric window

Manceron, Laurent

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https://hdl.handle.net/2142/100492 Copy

Description

Title

New data and analysis for SF6 absorption modelling in the 10 micron atmospheric window

Author(s)

Manceron, Laurent

Contributor(s)

• Roy, P.
• Richard, Cyril
• Loete, Michel
• Boudon, Vincent
• Faye, Mbaye

Issue Date

2018-06-19

Keyword(s)

Atmospheric science

Abstract

Modelling correctly the SF6 atmospheric absorption requires the knowledge of the spectroscopic parameters of all states involved in the many hot bands in the 10 µm atmospheric window used for remote sensing. Since a direct analysis of the hot bands near the ν3 absorption of SF6 in this atmospheric window is not possible, due to their overlapping, we use another strategy, gathering information in the far and mid infrared regions on initial and final states to compute the relevant total absorption. In this talk, we present new results of an analysis of spectra recorded at the AILES beam line at the SOLEIL Synchrotron facility. For these measurements, we used an IFS125HR interferometer in the 100 to 3200 cm−1 range, coupled to a cryogenic multiple pass cell. The optical path length was varied from 45 to 141 m with 223 and 153 K temperatures. New information has been obtained on the ν3 + ν5 band which, combined with improved parameters for ν5, is used to model the important ν3+ν5 - ν5 hot band contribution [1]. Also, data have been obtained on the ν3 band of the 36SF6 isotopic species present in very low abundance (0.0002) [2]. These new parameters will be included in the XTDS model [3] and VAMDC/SheCaSDa database [4], thus improving the previous SF6 parameters. [1] M. Faye, L. Manceron, P. Roy, V. Boudon, M. Loete, “First analysis of the ν3+ν5 combination band of SF6 observed at Doppler-limited resolution and effective model for the ν3+ν5-ν5 hot band” J. Mol. Spectrosc., in press. [2] M. Faye, L. Manceron, P. Roy, V. Boudon, M. Loete, “First high resolution analysis of the ν3 band of the 36SF6 isotopologue”, J. Mol. Spectrosc., in press. [3] C. Wenger, V. Boudon, M. Rotger, M. Sanzharov, and J.-P. Champion,”XTDS and SPVIEW: Graphical tools for Analysis and Simlation of High Resolution Molecular Spectra”, J. Mol. Spectrosc. 251, 102 (2008). [4] http://vamdc.icb.cnrs.fr/PHP/shecasda.php

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/100492

DOI

10.15278/isms.2018.TF03

Copyright and License Information

Copyright 2018 Laurent Manceron

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