{"title":"Temperature Dependence of Water Vapor Microwave Line Broadening","authors":"V. I. Starikov","doi":"10.1134/S1024856025700228","DOIUrl":null,"url":null,"abstract":"<p>Results of solving the problem of determining the temperature dependence of the broadening coefficient of water vapor lines by pressure of different buffer gases are presented. The broadening coefficients γ have been calculated for 18 microwave absorption lines of H<sub>2</sub>O molecule broadened by N<sub>2</sub>, O<sub>2</sub>, CO<sub>2</sub>, air, H<sub>2</sub>O, CO<sub>2</sub>, He, Ar, Kr, and Xe pressure in the temperature range 30 ≤ <i>T</i> ≤ 400 K. The models of rectilinear, parabolic, and exact trajectories of colliding particles are used. It is shown that the calculated dependence γ(<i>T</i>) for <i>T</i> <span>\\( \\lesssim \\)</span> 100 K is determined by the calculation method and model of the trajectories of colliding particles; in the case of broadening by monatomic gases, these results strongly depend on the chosen interaction potential. The results of the work can be useful for spectral calculations required by atmospheric applications.</p>","PeriodicalId":46751,"journal":{"name":"Atmospheric and Oceanic Optics","volume":"38 4","pages":"394 - 400"},"PeriodicalIF":0.9000,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric and Oceanic Optics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1024856025700228","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Results of solving the problem of determining the temperature dependence of the broadening coefficient of water vapor lines by pressure of different buffer gases are presented. The broadening coefficients γ have been calculated for 18 microwave absorption lines of H2O molecule broadened by N2, O2, CO2, air, H2O, CO2, He, Ar, Kr, and Xe pressure in the temperature range 30 ≤ T ≤ 400 K. The models of rectilinear, parabolic, and exact trajectories of colliding particles are used. It is shown that the calculated dependence γ(T) for T\( \lesssim \) 100 K is determined by the calculation method and model of the trajectories of colliding particles; in the case of broadening by monatomic gases, these results strongly depend on the chosen interaction potential. The results of the work can be useful for spectral calculations required by atmospheric applications.
期刊介绍：
Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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