Stratospheric Age of Air Derived from ACE-FTS and MIPAS SF6

Monthly zonal mean stratospheric age of air derived from the Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) v3.5/3.6 SF6 measurements and from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) V5R_222 and V5R_223 SF6 measurements. Age of air is provided on a 3km altitude (8-32km) and 10 degree latitude grid. The method for deriving age of air is described in Saunders et al. (2024). Two netCDF files are produced per dataset for the entire February 2004 to February 2021 period: one where a correction has been applied to account for the mesospheric SF6 sink and one where no correction has been applied. The different datasets include: ACE-FTS v3.5/3.6, ACE-FTS v3.5/3.6 coincident with MIPAS V5R, MIPAS V5R, MIPAS V5R coincident with ACE-FTS v3.5/3.6. Months without any data (i.e. MIPAS after April 2012) are left as blank entries. The standard deviation, standard error of the mean, and the number of measurements used are also provided for each age of air value.