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Diurnal Variation in Mars Equatorial Odd Oxygen Species: Chemical Production and Loss Mechanisms

Viúdez-Moreiras, D. and Saiz-Lopez, A. and Blaszczak-Boxe, C. S. and Rodriguez Manfredi, J. A. and Yung, Y. L. (2020) Diurnal Variation in Mars Equatorial Odd Oxygen Species: Chemical Production and Loss Mechanisms. Icarus, 336 . Art. No. 113458. ISSN 0019-1035. doi:10.1016/j.icarus.2019.113458.

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Odd oxygen (O, O(¹D), O₃) abundance and its variability in the Martian atmosphere results from complex physical and chemical interactions among atmospheric species, which are driven mainly by solar radiation and atmospheric conditions. Although our knowledge of Mars’ ozone distribution and variability has been significantly improved with the arrival of several recent orbiters, the data acquired by such missions is not enough to properly characterize its diurnal variation. Thus, photochemical models are useful tools to assist in such a characterization. Here, both the Martian ozone vertical distribution and its diurnal variation for equatorial latitudes are studied, using the JPL/Caltech one-dimensional photochemical model and diurnally-variable atmospheric profiles. The chosen equatorial latitude-region is based on the recent and future plans of NASA and other agencies to study this region by different surface missions. A production and loss analysis is performed in order to characterize the chemical mechanisms that drive odd oxygen's diurnal budget and variability on Mars making use of the comprehensive chemistry implemented in the model. The diurnal variation shows large differences in the abundance between daytime and nighttime; and variable behavior depending on the atmospheric layer. The photolysis-driven ozone diurnal profile is obtained at the surface, whilst a sharp decrease is obtained in the upper troposphere at daytime, which originates from the large differences in atomic oxygen abundances between atmospheric layers. Finally, no clear anticorrelation between ozone and water vapor is found in the diurnal cycle, contrary to the strong correlation observed by orbiters on a seasonal timescale.

Item Type:Article
Related URLs:
URLURL TypeDescription
Blaszczak-Boxe, C. S.0000-0002-5288-961X
Rodriguez Manfredi, J. A.0000-0003-0461-9815
Yung, Y. L.0000-0002-4263-2562
Additional Information:© 2019 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license. Received 26 April 2019, Revised 23 September 2019, Accept ed 30 September 2019, Available online 15 October 2019. This research has been su pported by the Spanish Ministry of Economy and Competiveness(MINECO), under projects ESP2014-54256-C4-1-R and ESP2016-79612-C3-1-R. The authors thank Michael D. Smith and an anonymous reviewer, whose comments helped improve this paper. The authors declare no conflict of interest.
Group:Astronomy Department
Funding AgencyGrant Number
Ministerio de Economía, Industria y Competitividad (MINECO)ESP2014-54256-C4-1-R
Ministerio de Economía, Industria y Competitividad (MINECO)ESP2016-79612-C3-1-R
Subject Keywords:Ozone distribution; Photochemistry; Martian atmosphere modeling; Atmospheric characterization; NASA Mars Science Laboratory (MSL)
Record Number:CaltechAUTHORS:20191015-100957612
Persistent URL:
Official Citation:D. Viúdez-Moreiras, A. Saiz-Lopez, C.S. Blaszczak-Boxe, J.A. Rodriguez Manfredi, Y.L. Yung, Diurnal variation in Mars equatorial odd oxygen species: Chemical production and loss mechanisms, Icarus, Volume 336, 2020, 113458, ISSN 0019-1035, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99269
Deposited By: Tony Diaz
Deposited On:15 Oct 2019 17:30
Last Modified:16 Nov 2021 17:45

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