University of Illinois Urbana-Champaign

Cavity Ring-down Spectroscopy Of Water Vapor In The Near-uv Region

Yang, Q.-Y.

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WI10_1.pptx
5982.pdf

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https://hdl.handle.net/2142/116510

Description

Title
Cavity Ring-down Spectroscopy Of Water Vapor In The Near-uv Region
Author(s)
Yang, Q.-Y.
Contributor(s)
  • Gordon, Iouli E.
  • Conway, Eamon K.
  • Hu, Shui-Ming
  • Tan, Y.
Issue Date
2022-06-22
Keyword(s)
Mini-symposium: Benchmarking in Spectroscopy
Abstract
\begin{wrapfigure}{l}{0pt} \includegraphics[scale=0.22]{cross-section.eps} \end{wrapfigure} Water vapor absorption in the near-ultraviolet region is essential to describing the energy budget of Earth, but little spectroscopic information is currently available since it is a challenging spectral region for both experimental and theoretical studies. A continuous-wave cavity ring-down spectroscopic experiment was built to record the weak absorption of water vapor in the \textit{near}-UV region around 415~nm. This is a region that is still missing in laboratory measurements. A minimum absorption coefficient detection of around $4\times10^{-10}~cm^{-1}$ was reached and over 40 ro-vibrational transitions of H$_2^{16}$O determined in this work. A comparison of line positions and intensities determined in this work to the most recent HITRAN2020 database will be presented. We calculate water vapor absorption cross-sections from our measurements and compare them with recent observations (Pei et al., 2019\footnote{Pei, et al., Journal of Geophysical Research: Atmospheres; 124(24):14310-14324.}; Du et al., 2013\footnote{Du et al., Geophysical Research Letters; 40(17):4788-4792.}; Dupr\'e et al., 2005\footnote{Dupr\'e et al., The Journal of Chemical Physics; 123(15): 154307}; Wilson et al., 2016\footnote{Wilson et al., Journal of Quantitative Spectroscopy and Radiative Transfer; 295(170): 194-199.}; Lampel et al., 2017\footnote{Lampel et al., Atmospheric Chemistry and Physics; 17(2): 1271–1295.}) and simulations (Gordon et al., 2022\footnote{Gordon et al., Journal of Quantitative Spectroscopy and Radiative Transfer; 277.}).
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116510
DOI
https://doi.org/10.15278/isms.2022.WI10
Copyright and License Information
Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY