Variations In Vertical Co/Co2 Profiles In The Martian Mesosphere And Lower Thermosphere Measured By Exomars Tgo/Nomad: Implications Of Variations In Eddy Diffusion Coefficient N. Yoshida, Graduate School Of Science, Tohoku University, Sendai, Japan (Nao.Yoshida.Q7@Dc.Tohoku.Ac.Jp), H. Nakagawa, Graduate School Of Science, Tohoku University, Sendai, Japan, S. Aoki, Graduate School Of Frontier Sciences, The University Of Tokyo, Kashiwa, Japan, J. Erwin, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium, A. C. Vandaele, Royal Belgian Institute For Space Aeronomy, Biraiasb, Brussels, Belgium, F. Daerden, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium, I. Thomas, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium, L. Trompet, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium, S. Koyama, Graduate School Of Science, Tohoku University, Sendai, Japan, N. Terada, Graduate School Of Science, Tohoku University, Sendai, Japan, L. Neary, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium, I. Murata, Graduate School Of Science, Tohoku University, Sendai, Japan, G. Villanueva, Nasa Goddard Space Flight Center, Md, Usa, G. Liuzzi, Nasa Goddard Space Flight Center, Md, Usa, M. A. Lopez-Valverde, Instituto De Astrofisica De Andalucia (Iaa/Csic), Granada, Spain, A. Brines, Instituto De Astrofisica De Andalucia (Iaa/Csic), Granada, Spain, A. Modak, Instituto De Astrofisica De Andalucia (Iaa/Csic), Granada, Spain, Y. Kasaba, Graduate School Of Science, Tohoku University, Sendai, Japan, B. Ristic, Royal Belgian Institute For Space Aeronomy, Bira-Iasb, Brussels, Belgium G. Bellucci, Institute Di Astrofisica E Planetologia Spaziali (Iaps/Inaf), Rome, Italy, J. J. López-Moreno, Instituto De Astrofisica De Andalucia (Iaa/Csic), Granada, Spain, And M. Patel, School Of Physical Sciences, The Open University, Uk Introduction: