@Article{OliveiraFränEcheFran:2021:AdMaCr,
               author = "Oliveira, Isabela de and Fr{\"a}nz, M. and Echer, Ezequiel and 
                         Franco, Adriane Marques de Souza",
          affiliation = "{Max-Planck-Institute for Solar System Research} and 
                         {Max-Planck-Institute for Solar System Research} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Advection of Martian Crustal Magnetic Fields by Ionospheric Plasma 
                         Flow Observed by the MAVEN Spacecraft",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2021",
               volume = "126",
               number = "9",
                pages = "e2021JA029242",
                month = "Sept.",
             keywords = "advection of magnetic fields, ionospheric plasma flow, Mars 
                         crustal magnetic fields, Mars ionosphere.",
             abstract = "The plasma environment of Mars is highly influenced by its crustal 
                         magnetic fields. In this work, we investigate whether the crustal 
                         magnetic fields can be displaced from their original positions due 
                         to advection by ionospheric plasma flow. The ranges of interest 
                         are altitudes between (Formula presented.) km and solar zenith 
                         angles between (Formula presented.). We examine magnetic field 
                         data using measurements from the Magnetometer (MAG) onboard the 
                         Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. We 
                         conduct statistical analyses ((Formula presented.) years of data) 
                         in order to investigate if horizontal shifts are observed between 
                         the data and the crustal magnetic field model by Langlais et al. 
                         (2019), 
                         https://doi-org.ez61.periodicos.capes.gov.br/10.1029/2018je005854. 
                         We also show two case studies of individual measurements within a 
                         specific region of Mars. The results show statistical and 
                         observational evidence that the crustal magnetic fields are often 
                         being advected towards the night-side of the planet. The 
                         displacement seems to increase exponentially as a function of 
                         altitude, reaching a horizontal shift of 100 km at 650 km 
                         altitude. Moreover, we use measurements from the SupraThermal And 
                         Thermal Ion Composition (STATIC) instrument in order to compare 
                         the dynamic pressure of ionospheric plasma flow to the magnetic 
                         pressure of the crustal magnetic fields. There are two possible 
                         causes for the displacement: a forcing by external magnetic 
                         pressure or an advection of the field to the electron fluid, which 
                         follows the ion fluid. In this paper, we argue that by the 
                         observed relation between ion fluid and displacement, the latter 
                         explanation is more probable.",
                  doi = "10.1029/2021JA029242",
                  url = "http://dx.doi.org/10.1029/2021JA029242",
                 issn = "2169-9402",
             language = "en",
           targetfile = "oliveira_advection.pdf",
        urlaccessdate = "03 maio 2024"
}