|Title||The MACC reanalysis: An 8-year data set of atmospheric composition|
|Publication Type||Technical memorandum|
|Secondary Title||ECMWF Technical Memorandum|
|Authors||Inness, A, Baier, F, Benedetti, A, Bouarar, I, Chabrillat, S, Clark, H, Clerbaux, C, Coheur, P, Engelen, R, Errera, Q, Flemming, J, George, M, Granier, C, Hadji-Lazaro, J, Huijnen, V, Hurtmans, D, Jones, L, Kaiser, J, Kapsomenakis, J, Lefever, K, Leitao, J, Razinger, M, Richter, A, Schultz, MG, Simmons, A, Suttie, M, Stein, O, Thépaut, J-N, Thouret, V, Vrekoussis, M, Zerefos, C, team, theMACC|
An eight-year long reanalysis of atmospheric composition data covering the period 2003-2010 was constructed as part of the FP7 funded Monitoring Atmospheric Composition and Climate project by assimilating satellite data into a global model and data assimilation system. This reanalysis provides fields of chemically reactive gases, namely carbon monoxide, ozone, nitrogen oxides, and formaldehyde, as well as aerosols and greenhouse gases globally at a resolution of about 80 km for both the troposphere and the stratosphere. This paper describes the assimilation system for the reactive gases and presents validation results for the reactive gases analysis fields to document the dataset and to give a first indication of its quality.