Macda Ii: A New Reanalysis For The Martian Atmosphere Using Vertically-Resolved Dust Opacity Observations P. L. Read, A. Valeanu, Ruan Tao, Atmospheric, Oceanic & Planetary Physics, University Of Oxford, Uk (Peter.Read@Physics.Ox.Ac.Uk), L. Montabone, Space Science Institute, Boulder, Co, Usa, & Laboratoire De Météorologie Dynamique, Ipsl, Sorbonne Université, Paris, France, S. R. Lewis, The Open University, Uk, R. M. B. Young, Department Of Physics & National Space Science And Technology Center, Uae University, Al Ain, United Arab Emirates. Introduction: The Dust Cycle Is A Key Component Of The Martian Climate, And Is Extremely Important For Understanding The Interannual, Seasonal And Synoptic Evolution Of The Martian Environment. (E.G., Kahre Et Al., 2017; Newman Et Al., 2002a, And References Therein). Intensive Measurements Of Atmospheric Temperature And Dust Extending Over More Than Eleven Mars Years (My) Now Exist With Unprecedented Spatial Coverage, Thanks To Various Orbital Spacecraft. Such Observations Have Already Helped To Improve Our Understanding Of Mars' Weather And Climate. However, The Incomplete Coverage Of These Measurements Across The Planet Constrains Our Ability To Study The General Circulation In Full Detail, Particularly Those Aspects Related To Dust Opacity. On The Other Hand, Numerical Models Provide Four-Dimensional Simulated Data With Moderate To High Temporal And Spatial Resolution And Complete