University of Illinois Urbana-Champaign

Multispectrum analysis of the oxygen A-band

Drouin, Brian

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1700.pdf
623900.pptx

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https://hdl.handle.net/2142/91176

Description

Title
Multispectrum analysis of the oxygen A-band
Author(s)
Drouin, Brian
Contributor(s)
  • Wishnow, Edward H.
  • Robichaud, David
  • Mlawer, Eli J.
  • Hodges, Joseph T.
  • Devi, V. Malathy
  • Benner, D. Chris
  • Yu, Shanshan
  • Sung, Keeyoon
  • Payne, Vivienne H.
  • Oyafuso, Fabiano
  • Guillaume, Alexander
  • Crawford, Timothy J.
  • Cich, Matthew J.
  • Brown, Linda R.
Issue Date
2016-06-22
Keyword(s)
Spectroscopy in Atmospheric Chemistry
Date of Ingest
2017-01-26T21:37:22Z
Abstract
Retrievals of atmospheric composition from near-infrared measurements require measurements of airmass to better than the desired precision of the composition. The oxygen bands are obvious choices to quantify airmass since the mixing ratio of oxygen is fixed over the full range of atmospheric conditions. The OCO-2 mission is currently retrieving carbon dioxide concentration using the oxygen A-band for airmass normalization. The 0.25\% accuracy desired for the carbon dioxide concentration has pushed the required state-of-the-art for oxygen spectroscopy. To measure O$_2$ A-band cross-sections with such accuracy through the full range of atmospheric pressure requires a sophisticated line-shape model (Rautian or Speed-Dependent Voigt) with line mixing (LM) and collision induced absorption (CIA). Models of each of these phenomena exist, however, this work presents an integrated self-consistent model developed to ensure the best accuracy. It is also important to consider multiple sources of spectroscopic data for such a study in order to improve the dynamic range of the model and to minimize effects of instrumentation and associated systematic errors. The techniques of Fourier Transform Spectroscopy (FTS) and Cavity Ring-Down Spectroscopy (CRDS) allow complimentary information for such an analysis. We utilize multispectrum fitting software to generate a comprehensive new database with improved accuracy based on these datasets. The extensive information will be made available as a multi-dimensional cross-section (ABSCO) table and the parameterization will be offered for inclusion in the HITRANonline database.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
En
Permalink
http://hdl.handle.net/2142/91176
Copyright and License Information
Copyright 2016 by the authors

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Abstracts & Presentations - 2016 International Symposium on Molecular Spectroscopy PRIMARY