Observations Of Dicke Narrowing And Speed-dependence In Co2 Lineshapes Near 2060nm

Bui, Thinh Quoc

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https://hdl.handle.net/2142/50975 Copy

Description

Title

Observations Of Dicke Narrowing And Speed-dependence In Co2 Lineshapes Near 2060nm

Author(s)

Bui, Thinh Quoc

Contributor(s)

• Okumura, Mitchio
• Rupasinghe, Priyanka
• Hogan, Daniel
• Sironneau, Vincent
• Agata, Cygan
• Long, David A.

Issue Date

2014-06-16

Keyword(s)

Linelists, Lineshapes, Collisions

Abstract

To achieve NASA's strategic scientific mission of monitoring global atmospheric CO$_2$ at a target precision of 0.25\%, we perform laser based measurements and lineshape studies of the reference atmospheric target CO$_2$ band (20013)$\gets$(00001) centered at 2060nm to meet the precision requirements of current (ACOS/GOSAT/TCCON) and future (OCO-2/OCO-3/ASCENDS) remote sensing applications. We utilize a frequency-stabilized cavity ringdown spectrometer, (FS-CRDS), to provide high precision and high spectral resolution for probing non-Voigt lineshape features (Dicke narrowing, speed dependence) of CO$_2$ currently unaccounted for in databases like HITRAN. We discuss our results for two R-branch lines R(24) and R(30) near 2055nm, which display concurrent collisional narrowing and speed dependence effects.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50975

DOI

https://doi.org/10.15278/isms.2014.MK12

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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