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Title:Modeling Planetary Opacities With Hitran And Hapi: Test Case Of Ammonia Microwave Absorption Spectra Under Jovian Condition
Author(s):Skinner, Frances M
Contributor(s):Gordon, Iouli E.; Hargreaves, Robert J.
Abstract:The HITRAN (high-resolution transmission molecular spectroscopic database) is an international standard for reference molecular spectroscopy, particularly in simulating planetary and terrestrial atmospheric spectra [1]. HITRAN recently added new broadening parameters that are relevant to planetary atmospheres for many chemical species in the database. For NH$_3$, new broadening parameters include H$_2$, He, CO$_2$ [2] and H$_2$O [3]. These additional broadening parameters for NH$_3$ allowed for validations of HITRAN data with the HITRAN Application Programming Interface (HAPI) [4] against the NH$_3$ opacity models and laboratory data utilized by the Juno Mission. The Juno spacecraft carries with it a microwave radiometer which probes the atmospheric composition of Jupiter in the microwave range (0.02-0.73 cm$^{-1}$) [5,6]. At these frequencies, Jupiter’s atmospheric spectra is dominated by the inversion of NH$_3$ and is broadened by H$_2$, He, and H$_2$O. This work required three new line shapes to be incorporated into HAPI in order to accurately compare to available laboratory data and standard NH$_3$ opacity models (the Ben-Reuven [7], Gross [8] and Van Vleck and Weisskopf [9] line shapes). The results of this work demonstrate that HAPI can be used with HITRAN data, to model NH$_3$ opacities under Jovian conditions in the microwave region. It also shows great promise to produce opacities for other species of interest to the planetary community.\newline \newline \noindent\scriptsize{\underline{References}}\newline [1] I. E. Gordon, et al. JQSRT, 203:3–69, 2017.\newline [2] J. S. Wilzewski, et al. JQSRT, 168:193–206, 2016.\newline [3] Y. Tan, et al. JGR (Atmospheres), 124(21): 11580–11594, 2019.\newline [4] R. V. Kochanov, et al. JQSRT, 177:15–30, 2016.\newline [5] M. A. Janssen, et al. Space Science Reviews, 213(1–4):139–185, 2017.\newline [6] S. J. Bolton, et al. Science, 356(6340):821–825, 2017.\newline [7] A. Ben-Reuven, Physical Review, 145:7–22, 1966.\newline [8] E. P. Gross, Physical Review, 97: 395–403, 1955.\newline [9] J. H. Van Vleck and V.F. Weisskopf, Review Modern Physics, 17:227–236, 1945.
Issue Date:2021-06-23
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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