Cavity ring-down spectroscopy of water vapor in the deep-blue region

Autor: Q.-Y. Yang, E. K. Conway, H. Liang, I. E. Gordon, Y. Tan, S.-M. Hu
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Atmospheric Measurement Techniques, Vol 15, Pp 4463-4472 (2022)
Druh dokumentu: article
ISSN: 1867-1381
1867-8548
49252011
DOI: 10.5194/amt-15-4463-2022
Popis: 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.
Databáze: Directory of Open Access Journals
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