Benna, M., Mahaffy, P. R., Grebowsky, J. M., Fox, J. L., Yelle, R. V., and Jakosky, B. M.: First measurements of composition and dynamics of the Martian ionosphere by MAVEN's Neutral Gas and Ion Mass Spectrometer, Geophys. Res. Lett., 42, 8958–8965, https://doi.org/10.1002/2015GL066146, 2015.
Bjoland, L. M., Ogawa, Y., Løvhaug, U. P., Lorentzen, D. A., Hatch, S. M., and Oksavik, K.: Electron Density Depletion Region Observed in the Polar Cap Ionosphere, Geophys. Res. Lett.-Space, 126, e2020JA028432, https://doi.org/10.1029/2020JA028432, 2021.
Brace, L. H., Theis, R. F., Mayr, H. G., Curtis, S. A., and Luhmann, J. G.: Holes in the nightside ionosphere of Venus, J. Geophys. Res., 87, 199–211, https://doi.org/10.1029/JA087iA01p00199, 1982.
Cao, Y., Niu, D., Liang, W., Cui, J., Wu, X., Wan, X., Zhong, J., Li, L., Rong, Z., and Wei, Y.: Total electron content depression in the nightside Martian ionosphere
: statistical results from Mars Express MARSIS measurements and implications, Mon. Not. R. Astron. Soc., 519, 2262–2267, https://doi.org/10.1093/mnras/stac3641, 2022.
Chu, F., Girazian, Z., Gurnett, D. A., Morgan, D. D., Halekas, J., Kopf, A. J., Thiemann, E. M. B., and Duru, F.: The Effects of Crustal Magnetic Fields and Solar EUV Flux on Ionopause Formation at Mars, Geophys. Res. Lett., 46, 10257–10266, https://doi.org/10.1029/2019GL083499, 2019.
Collinson, G. A., McFadden, J., Grebowsky, J., Mitchell, D., Lillis, R., Withers, P., Vogt, M. F., Benna, M., Espley, J., and Jakosky, B.: Constantly forming sporadic E-like layers and rifts in the Martian ionosphere and their implications for Earth, Nat. Astron., 4, 486–491, https://doi.org/10.1038/s41550-019-0984-8, 2020.
Connerney, J. E. P., Espley, J., Lawton, P., Murphy, S., Odom, J., Oliversen, R., and Sheppard, D.: The MAVEN Magnetic Field Investigation, Space Sci. Rev., 195, 257–291, https://doi.org/10.1007/s11214-015-0169-4, 2015.
Cravens, T. E., Hoppe, A., Ledvina, S. A., and McKenna-Lawlor, S.: Pickup ions near Mars associated with escaping oxygen atoms: PICKUP IONS NEAR MARS, J. Geophys. Res., 107, SMP 7-1–SMP 7-10, https://doi.org/10.1029/2001JA000125, 2002.
Dubinin, E., Fraenz, M., Andrews, D., and Morgan, D.: Martian ionosphere observed by Mars Express, 1. Influence of the crustal magnetic fields, Planet. Space Sci., 124, 62–75, https://doi.org/10.1016/j.pss.2016.02.004, 2016.
Dunn, P. A.: MAVEN Insitu Key Parameters Data Bundle, NASA Planetary Data System [data set],
https://pds-ppi.igpp.ucla.edu/search/view/?id=pds://PPI/maven.insitu.calibrated, last accessed: 30 November 2023.
Duru, F., Gurnett, D. A., Morgan, D. D., Winningham, J. D., Frahm, R. A., and Nagy, A. F.: Nightside ionosphere of Mars studied with local electron densities: A general overview and electron density depressions: Nightside Ionosphere Of Mars, J. Geophys. Res., 116, A10316, https://doi.org/10.1029/2011JA016835, 2011.
Duru, F., Frahm, R. A., Hughes, D., Caplice, T., Pierce, J., and Madanian, H.: Local Electron Density Depletions in the Martian Upper Ionosphere Obtained From MARSIS: Comparison With ASPERA-3, and MAVEN, and the Connection With Crustal Magnetic Fields, J. Geophys. Res.-Space, 128, e2023JA031327, https://doi.org/10.1029/2023JA031327, 2023.
Fan, K., Fraenz, M., Wei, Y., Han, Q., Dubinin, E., Cui, J., Chai, L., Rong, Z., Zhong, J., Wan, W., Mcfadden, J., and Connerney, J. E. P.: Reduced Atmospheric Ion Escape Above Martian Crustal Magnetic Fields, Geophys. Res. Lett., 46, 11764–11772, https://doi.org/10.1029/2019GL084729, 2019.
Flynn, C. L., Vogt, M. F., Withers, P., Andersson, L., England, S., and Liu, G.: MAVEN Observations of the Effects of Crustal Magnetic Fields on Electron Density and Temperature in the Martian Dayside Ionosphere, Geophys. Res. Lett., 44, 10812–10821, https://doi.org/10.1002/2017GL075367, 2017.
Fowler, C. M., McFadden, J., Hanley, K. G., Mitchell, D. L., Curry, S., and Jakosky, B.: In-Situ Measurements of Ion Density in the Martian Ionosphere: Underlying Structure and Variability Observed by the MAVEN-STATIC Instrument, Geophys. Res. Lett.-Space, 127, e2022JA030352, https://doi.org/10.1029/2022JA030352, 2022.
Girazian, Z., Mahaffy, P., Lillis, R. J., Benna, M., Elrod, M., Fowler, C. M., and Mitchell, D. L.: Ion Densities in the Nightside Ionosphere of Mars: Effects of Electron Impact Ionization, Geophys. Res. Lett., 44, 11248–11256, https://doi.org/10.1002/2017GL075431, 2017.
Girazian, Z., Luppen, Z., Morgan, D. D., Chu, F., Montabone, L., Thiemann, E. M. B., Gurnett, D. A., Halekas, J., Kopf, A. J., and Němec, F.: Variations in the Ionospheric Peak Altitude at Mars in Response to Dust Storms: 13 Years of Observations From the Mars Express Radar Sounder, J. Geophys. Res.-Planet., 125, e2019JE006092, https://doi.org/10.1029/2019JE006092, 2020.
González-Galindo, F., Eusebio, D., Němec, F., Peter, K., Kopf, A., Tellmann, S., and Paetzold, M.: Seasonal and Geographical Variability of the Martian Ionosphere From Mars Express Observations, J. Geophys. Res.-Planet., 126, e2020JE006661, https://doi.org/10.1029/2020JE006661, 2021.
Haider, S. A., Mahajan, K. K., and Kallio, E.: Mars ionosphere: A review of experimental results and modeling studies, Rev. Geophys., 49, RG4001, https://doi.org/10.1029/2011RG000357, 2011.
Hanley, K. G., McFadden, J. P., Mitchell, D. L., Fowler, C. M., Stone, S. W., Yelle, R. V., Mayyasi, M., Ergun, R. E., Andersson, L., Benna, M., Elrod, M. K., and Jakosky, B. M.: In Situ Measurements of Thermal Ion Temperature in the Martian Ionosphere, J. Geophys. Res.-Space, 126, e2021JA029531, https://doi.org/10.1029/2021JA029531, 2021.
Lundin, R., Barabash, S., Yamauchi, M., Nilsson, H., and Brain, D.: On the relation between plasma escape and the Martian crustal magnetic field: Plasma Escape And Martian Magnetic Field, Geophys. Res. Lett., 38, L02102, https://doi.org/10.1029/2010GL046019, 2011.
Mahaffy, P. R., Benna, M., Elrod, M., Yelle, R. V., Bougher, S. W., Stone, S. W., and Jakosky, B. M.: Structure and composition of the neutral upper atmosphere of Mars from the MAVEN NGIMS investigation: State Of The Upper Atmosphere Of Mars, Geophys. Res. Lett., 42, 8951–8957, https://doi.org/10.1002/2015GL065329, 2015a.
McFadden, J. P., Kortmann, O., Curtis, D., Dalton, G., Johnson, G., Abiad, R., Sterling, R., Hatch, K., Berg, P., Tiu, C., Gordon, D., Heavner, S., Robinson, M., Marckwordt, M., Lin, R., and Jakosky, B.: MAVEN SupraThermal and Thermal Ion Compostion (STATIC) Instrument, Space Sci. Rev., 195, 199–256, https://doi.org/10.1007/s11214-015-0175-6, 2015.
Mitchell, D. L., Mazelle, C., Sauvaud, J.-A., Thocaven, J.-J., Rouzaud, J., Fedorov, A., Rouger, P., Toublanc, D., Taylor, E., Gordon, D., Robinson, M., Heavner, S., Turin, P., Diaz-Aguado, M., Curtis, D. W., Lin, R. P., and Jakosky, B. M.: The MAVEN Solar Wind Electron Analyzer, Space Sci. Rev., 200, 495–528, https://doi.org/10.1007/s11214-015-0232-1, 2016.
Morschhauser, A., Lesur, V., and Grott, M.: A spherical harmonic model of the lithospheric magnetic field of Mars, J. Geophys. Res.-Planet., 119, 1162–1188, https://doi.org/10.1002/2013JE004555, 2014.
Nielsen, E., Fraenz, M., Zou, H., Wang, J.-S., Gurnett, D. A., Kirchner, D. L., Morgan, D. D., Huff, R., Safaeinili, A., Plaut, J. J., Picardi, G., Winningham, J. D., Frahm, R. A., and Lundin, R.: Local plasma processes and enhanced electron densities in the lower ionosphere in magnetic cusp regions on Mars, Planet. Space Sci., 55, 2164–2172, https://doi.org/10.1016/j.pss.2007.07.003, 2007.
Rodger, A. S., Moffett, R. J., and Quegan, S.: The role of ion drift in the formation of ionisation troughs in the mid- and high-latitude ionosphere – a review, J. Atmos. Terr. Phys., 54, 1–30, https://doi.org/10.1016/0021-9169(92)90082-V, 1992.
Schunk, R. and Nagy, A.: Ionospheres: Physics, Plasma Physics, and Chemistry, 2nd Edn., Cambridge University Press, Cambridge, https://doi.org/10.1017/CBO9780511635342, 2009.
St.-Maurice, J.-P. and Torr, D. G.: Nonthermal rate coefficients in the ionosphere: The reactions of O
+ with N
2, O
2, and NO, J. Geophys. Res., 83, 969–977, https://doi.org/10.1029/JA083iA03p00969, 1978.
Viggiano, A. A., Morris, R. A., Van Doren, J. M., and Paulson, J. F.: Temperature, kinetic energy, and internal energy dependences of the rate constant and branching fraction for the reaction of O
+ (
4S) with CO
2, J. Chem. Phys., 96, 270–274, https://doi.org/10.1063/1.462514, 1992.
Vogt, M. F., Withers, P., Fallows, K., Andersson, L., Girazian, Z., Mahaffy, P. R., Benna, M., Elrod, M. K., Connerney, J. E. P., Espley, J. R., Eparvier, F. G., and Jakosky, B. M.: MAVEN observations of dayside peak electron densities in the ionosphere of Mars, J. Geophys. Res.-Space, 122, 891–906, https://doi.org/10.1002/2016JA023473, 2017.
Withers, P.: Ionospheric characteristics above Martian crustal magnetic anomalies, Geophys. Res. Lett., 32, L16204, https://doi.org/10.1029/2005GL023483, 2005.
Withers, P., Matta, M., Lester, M., Andrews, D., Edberg, N. J. T., Nilsson, H., Opgenoorth, H., Curry, S., Lillis, R., Dubinin, E., Fränz, M., Han, X., Kofman, W., Lei, L., Morgan, D., Pätzold, M., Peter, K., Opitz, A., Wild, J. A., and Witasse, O.: The morphology of the topside ionosphere of Mars under different solar wind conditions: Results of a multi-instrument observing campaign by Mars Express in 2010, Plane. Space Sci., 120, 24–34, https://doi.org/10.1016/j.pss.2015.10.013, 2016.
Withers, P., Flynn, C. L., Vogt, M. F., Mayyasi, M., Mahaffy, P., Benna, M., Elrod, M., McFadden, J. P., Dunn, P., Liu, G., Andersson, L., and England, S.: Mars's Dayside Upper Ionospheric Composition Is Affected by Magnetic Field Conditions, J. Geophys. Res.-Space, 124, 3100–3109, https://doi.org/10.1029/2018JA026266, 2019.
Xu, S., Mitchell, D. L., McFadden, J. P., Fillingim, M. O., Andersson, L., Brain, D. A., Weber, T., Schneider, N. M., Jain, S., Fowler, C. M., Lillis, R., Mazelle, C., and Espley, J.: Inverted-V Electron Acceleration Events Concurring With Localized Auroral Observations at Mars by MAVEN, Geophys. Res. Lett., 47, e2020GL087414, https://doi.org/10.1029/2020GL087414, 2020.
