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

Date of Ingest

• 2014-09-17T16:55:40Z
• 2015-04-14T18:37:40Z

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

Genre of Resource

Conference Paper / Presentation

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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