Atmospheric Variation And Distribution Of Martian Meteoric Mg+ From Maven/Iuvs M. M. J. Crismani1, R. M. Tyo1, N. M. Schneider2, J. M. C. Plane3, W. Feng3,4, J.D. Carrillo-Sanchez5,6, G. L. Villanueva5, S. Jain2, J. Deighan2 1 California State University, San Bernardino, Department Of Physics, Ca Usa (Matteo.Crismani@Csusb.Edu) 2 Laboratory 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 Introduction: 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