Cavity ring-down spectroscopy of water vapor in the deep-blue region
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Published:2022-08-02
Issue:15
Volume:15
Page:4463-4472
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Yang Qing-Ying, Conway Eamon K., Liang Hui, Gordon Iouli E.ORCID, Tan YanORCID, Hu Shui-MingORCID
Abstract
Abstract. Water vapor absorption in the near-ultraviolet region is essential to describe the energy budget of Earth, but little spectroscopic information is 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 absorption lines of water vapor around 415 nm.
With a precision of 4×10-10 cm−1, 40 rovibrational transitions of H216O were observed in this work, and 27 of them were assigned to the (224), (205), (710), (304), (093), (125) and (531) vibrational bands.
A comparison of line positions and intensities determined in this work to the most recent HITRAN database is presented.
Water vapor absorption cross-sections near 415 nm were calculated based on our measurements,
which vary between 1×10-26 and 5×10-26cm2 molec.−1.
These data will also significantly impact the spectroscopy detection of trace gas species in the near-UV region.
Funder
National Natural Science Foundation of China Bureau of Development and Planning, Chinese Academy of Sciences
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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