Five years of Sentinel-5p TROPOMI operational ozone profiling and geophysical validation using ozonesonde and lidar ground-based networks

Arno Keppens (1) , Serena Di Pede (2) , Daan Hubert (1) , Jean-Christopher Lambert (1) , Pepijn Veefkind (2) , Maarten Sneep (2) , Johan de Haan (2) , Mark ter Linden (2) , Thierry Leblanc (3) , Steven Compernolle (1) , Tijl Verhoelst (1) , José Granville (1) , Oindrila Nath (1) , Ann Mari Fjaeraa (4) , Ian Boyd (5) , Sander Niemeijer (6) , Roeland van Malderen (7) , Herman G J Smit (8) , Valentin Duflot (9) , Sophie Godin-Beekmann (10) , Bryan J Johnson (11) , Wolfgang Steinbrecht (12) , David W Tarasick (13) , Debra E Kollonige (14) , Ryan M Stauffer (14) , Anne M Thompson (14) , Angelika Dehn (15) , Claus Zehner (15)

1 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique
2 KNMI - Royal Netherlands Meteorological Institute
3 JPL - Jet Propulsion Laboratory
4 NILU - Norwegian Institute for Air Research
5 Bryan Scientific Consulting LLC
6 Science and Technology B.V.
7 IRM - Institut Royal Météorologique de Belgique [Bruxelles] - Royal Meteorological Institute of Belgium
8 IEK-8 - Institut für Energie- und Klimaforschung - Troposphäre
9 LACy - Laboratoire de l'Atmosphère et des Cyclones
10 STRATO - LATMOS
11 GML - ESRL Global Monitoring Laboratory [Boulder]
12 DWD - Deutscher Wetterdienst [Offenbach]
13 ECCC - Environment and Climate Change Canada
14 Atmospheric Chemistry and Dynamics Laboratory [ Greenbelt]
15 ESRIN - ESA Centre for Earth Observation

The Sentinel-5 Precursor (S5P) satellite operated by the European Space Agency (ESA) carries the TROPOspheric Monitoring Instrument (TROPOMI) on a Sun-synchronous low-Earth orbit since October 13, 2017. The S5P mission has acquired more than five years of TROPOMI nadir ozone profile data retrieved from the Level-0-to-1B processor version 2.0 and the Level-1B-to-2 Optimal Estimation based processor version 2.4.0. The latter is described in detail in this work, followed by the geophysical validation of the resulting ozone profiles for the period May 2018 to April 2023. Comparison of TROPOMI 5 ozone profile data to co-located ozonesonde and lidar measurements used as references, concludes to a median agreement better than 5 to 10 % in the troposphere. The bias goes up to-15 % in the upper stratosphere (35-45 km) where it can exhibit vertical oscillations. The comparisons show a dispersion of about 30 % in the troposphere and 10 to 20 % in the upper troposphere to lower stratosphere (UTLS) and in the middle stratosphere, which is close to mission requirements. Chi-square tests of the observed differences confirm on average the validity of the ex-ante (prognostic) satellite and ground-based data 10 uncertainty estimates in the middle stratosphere, above about 20 km. Around the tropopause and below, the mean chi-square 1

Domaines: Océan, Atmosphère

Arno Keppens, Serena Di Pede, Daan Hubert, Jean-Christopher Lambert, Pepijn Veefkind, et al.. Five years of Sentinel-5p TROPOMI operational ozone profiling and geophysical validation using ozonesonde and lidar ground-based networks. Atmospheric Measurement Techniques Discussions, 2024, ⟨10.5194/amt-2023-264⟩. ⟨insu-04383525v1⟩