The ion escape rate in the Martian magnetotail

Ion escape constitutes one of the key processes driving Martian atmospheric evolution, and the magnetotail serves as a crucial channel for ion escape from Mars. Based on 10-years in-situ magnetic field and particle data obtained by the MVAEN satellite, we selected 220 Martian magnetotail current sheet crossing events that satisfy the 1-D Harris current sheet model. Through systematic statistical analysis of ion flux and density in the current sheet and tail lobe regions, we clarified the ion distribution characteristics in these two regions. Furthermore, combined with the induced magnetosphere boundary model, we calculated the escape rates of various ion species in the current sheet and tail lobe regions, and investigated the effect of solar wind conditions on the magnetotail ion escape process.