Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 – 23 September 2022
Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 September – 23 September 2022
EPSC Abstracts
Vol. 16, EPSC2022-274, 2022
https://doi.org/10.5194/epsc2022-274
Europlanet Science Congress 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Martian Meteoric Mg+: Atmospheric Distribution and Variability from MAVEN/IUVS

Matteo Crismani1, Robert Tyo1, Nicholas Schneider2, John Plane3, Wuhu Feng3,4, Juan-Diego Carrillo-Sanchez5,6, Geronimo Villanueva5, Sonal Jain2, and Justin Deighan2
Matteo Crismani et al.
  • 1California State University, San Bernardino, Physics Department, San Bernardino, United States of America (matteo.crismani@csusb.edu)
  • 2Laboratory for Atmospheric and Space Physics, Boulder, CO USA
  • 3School of Chemistry, University of Leeds, Leeds, UK.
  • 4National Centre for Atmospheric Science, University of Leeds, Leeds, UK
  • 5NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 6Catholic University of America, Department of Physics, Washington DC, USA

Since the discovery of atmospheric Mg+ at Mars in 2015 by the Mars Atmosphere and Volatile Evolution (MAVEN) mission, there have been almost continuous observations of this meteoric ion layer in a variety of seasons, local times, and latitudes. Here we present the most comprehensive set of observations of the persistent metal ion layer at Mars, constructing the first grand composite maps of a metallic ion species. These maps demonstrate that Mg+ appears in almost all conditions when illuminated, with peak values varying between 100 and 500 cm-3, dependent on season and local time. There exists significant latitudinal variation within a given season, indicating that Mg+ is not simply an inert tracer, but instead may be influenced by the meteoric input distribution and/or atmospheric dynamics and chemistry. Geographic maps of latitude and longitude indicate that Mg+ may be influenced by atmospheric tides, and there is no apparent correlation with remnant crustal magnetic fields. This work also presents counter-intuitive results, such as a reduction of Mg+ ions in the northern hemisphere during Northern Winter in an apparent correlation with dust aerosols.

How to cite: Crismani, M., Tyo, R., Schneider, N., Plane, J., Feng, W., Carrillo-Sanchez, J.-D., Villanueva, G., Jain, S., and Deighan, J.: Martian Meteoric Mg+: Atmospheric Distribution and Variability from MAVEN/IUVS, Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-274, https://doi.org/10.5194/epsc2022-274, 2022.

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