The Mars Climate Database, Version 6.1 E. Millour1, F. Forget 1, A. Spiga1, T. Pierron1, A. Bierjon1, L. M Ontabone1,2, M . Vals 1,3, F. Lefèvre3, F. M Ontmessin3, J.-Y. Chaufray 3, M . A. López-Valverde4, F. González-Galindo4, S. R. Lewis 5, P. L. Read6, M .-C. Desjean7, F. Cipriani8 And The M Cd Development Team. 1 Laboratoire De M Étéorologie Dynamique (Lm D), Ipsl, Sorbonne Université, Paris, France, (Millour@Lmd.Jussieu.Fr), 2space Science Institute, Boulder, Usa, 3laboratoire Atmosphères, M Ilieux, Observations Spatiales (Latm Os), Ipsl, Paris, France, 4instituto De Astrofisica De Andalucia (Iaa-Csic), Granada, Spain, 5department Of Physical Sciences, The Open University, M Ilton Keynes, Uk, 6atmospheric, Oceanic And Planetary Physics (Aopp), Oxford, Uk, 7centre National D’Etudes Spatiales (Cnes), Toulouse, France, 8european Space Research And Technology Center (Estec), Noordwijk, The Netherlands Introduction: The Mars Climate Database (Mcd) Is A Database Of Meteorological Fields Derived From General Circulation Model (Gcm) Numerical Simulations Of The Martian Atmosphere And Validated Using Available Observational Data. The Mcd Includes Complementary Post-Processing Schemes Such As High Spatial Resolution Interpolation Of Environmental Data And Means Of Reconstructing The Variability Thereof. The Gcm That Is Used To Create The Mcd Data Is Developed At Laboratoire De Météorologie Dynamique Du Cnrs (Paris, France) [1] In Collaboration With Latmos (Paris, France), The Open University