Tropospheric Ozone

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Validation Summary

The Sentinel-5p TROPOMI L2_O3_TCL data (CCD) are in good overall agreement with correlative ground-based measurements (SHADOZ ozonesonde) and with EOS-Aura OMI and Metop-B GOME-2 satellite data. Bias and dispersion estimates meet mission requirements (<25%).

Product IDStreamProductVersionOrbitsBiasDispersionSpecial features
L2_O3_TCL OFFL CCD 02.04.01
02.03.00
02.02.01
02.01.04
02.01.03
01.01.08
01.01.07
01.01.06
01.01.05		 24546-current
22659-24532
19311-22645
16104-19140
14132-16090
12288-14075
7804-12273
7435-7791
2824-7421		 +17%
+3.3 DU		 25%
4.7 DU
  • Processor switches introduce step change in bias (+1.0 DU after 2 July 2020 and +0.6 DU after 2 July 2021).
  • Seasonal change of the bias at several sites (e.g., Atlantic region).
  • Geographical imprints of sampling-related biases.
  • Dispersion includes considerable contribution from co-location mismatch.

 

The graphs below display the up-to-date estimates of TROPOMI tropospheric O3 data quality (combining V01 and V02) obtained from comparisons to ozonesonde. Shown are the median value (left) and the dispersion (right, 68% interpercentile) of the absolute difference TROPOMI minus ozonesonde, at each SHADOZ site (marker) in the 20o S - 20o N tropical belt. The blue line and light blue shade indicate the mean value and the standard deviation of the sample of station estimates for the SHADOZ network.

A detailed description of the method and a comprehensive discussion of validation results can be found in the Quarterly Validation Report #17: April 2018 - November 2022.

TROPOMI vs SHADOZ ozonesonde