Harmonised satellite tropospheric ozone Climate Data Records (TAPIOWCA)

Harmonised satellite Climate Data Records of monthly 1° latitude x 1° longitude gridded tropospheric ozone columns described in Keppens et al. (2025, https://doi.org/10.5194/amt-18-6893-2025), created under the Belgian TAPIOWCA project (https://tapiowca.aeronomie.be/) for the second __Tropospheric Ozone Assessment Report__ (https://igacproject.org/activities/TOAR/TOAR-II/) and the __CEOS__ VC-20-01 Activity on Tropospheric Ozone (https://ceos.org/ourwork/virtual-constellations/acc/).

##Data contents##
This file contains 16 satellite tropospheric ozone column Climate Data Records (monthly, 1° latitude x 1° longitude gridded) that were processed to harmonise their vertical top levels as well as their prior information. This netCDF file contains the following data records with various horizontal and temporal coverages: GOME, SCIAMACHY, OMI, GOME-2A, and GOME-2B (RAL/ESA); GOP-ECV (DLR/ESA); TROPOMI (KNMI/ESA); IASI-CDR (ULB/LATMOS/EUMETSAT); IASI-GOME2-B (LISA/AERIS); GTTO-ECV (DLR/BIRA-IASB/ESA); GTO-LIMB and OMI-LIMB (FMI/DLR/ESA); OMPS-LNM (IUP-UB); and OMI-MLS, OMPS-MERRA2, and EPIC-MERRA2 (GSFC/NASA).
The Copernicus Atmosphere Monitoring Service ReAnalysis (CAMSRA) was used as a transfer standard for harmonisation, limiting the output CDRs to 2003-2023.