The TCOM-O3 Version 2.0 dataset provides a gap-free daily zonal stratospheric profile record of ozone (O3) volume mixing ratios spanning 9,132 daily time steps (2000–2024) across 64 latitude bands (87.86°N to 87.86°S) as part of the NCEO Core Datasets collection. The dataset is distributed in two CF-1.7 compliant NetCDF files containing daily zonal median mixing ratios (zmo3, in mol/mol) alongside level-specific uncertainty estimates (zmo3_uncertainty) derived using quantile regression. Height-level profiles are stored in "zmo3_tcom_hlev_2000-2024_V2.0.nc" (~234 MB) across 50 geometric altitude levels (1 to 50 km at 1 km resolution), while pressure-level profiles are stored in zmo3_tcom_plev_2000-2024_V2.0.nc" (~103 MB) interpolated onto 22 standard pressure levels ranging from 300 to 1 hPa
. Outside the scientifically valid observational retrieval range (5 km to 50 km), uncertainty values are set to NaN to explicitly denote uncorrected TOMCAT CTM model data.