Most simulations since 2010 have been ‘Hindcasts’, that is, simulations of the recent past using reanalysis meteorology.
Descriptions of all simulations and how to obtain them can be found on the Simulations pages. They are grouped by our most recent (MERRA2 Hindcasts), simulations from ~2010-2015 (MERRA Hindcasts), and everything that came before (pre-MERRA Simulations).
Outputs are saved at various frequencies including daily instantaneous, monthly average, daily column, and daily satellite overpass times. Other outputs, such as rates for thermal and photolytic reactions, fluxes, and tendencies, are also available. The linux command ncdump –h filename is useful for peeking inside the file to see all variable names and types.
Hourly output from the more than 300 stations saved is concatenated into single *profile.nc file located in the ‘stations’ subdirectory, directly under each simulation’s main directory (see the Summary of Production Runs for experiment directories).
