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

作者：Arno Keppens, Serena Di Pede, Daan Hubert, Jean‐Christopher Lambert, Pepijn Veefkind, Maarten Sneep, Johan de Haan, Mark ter Linden, Thierry Leblanc, Steven Compernolle, Tijl Verhoelst, J. Granville, Oindrila Nath, Ann Mari Fjæraa, Ian Boyd, Sander Niemeijer, Roeland Van Malderen, H. G. J. Smit, Valentin Duflot, Sophie Godin‐Beekmann, B. J. Johnson, Wolfgang Steinbrecht, D. W. Tarasick, Debra E. Kollonige, Ryan M. Stauffer, Anne M. Thompson, Angelika Dehn, Claus Zehner · 发表于：Atmospheric measurement techniques · 年份：2024 · DOI：10.5194/amt-17-3969-2024 · 被引用次数：22 · 研究领域：Atmospheric Ozone and Climate、Atmospheric and Environmental Gas Dynamics、Atmospheric chemistry and aerosols

Abstract. The Sentinel-5 Precursor (S5P) satellite operated by the European Space Agency has carried the TROPOspheric Monitoring Instrument (TROPOMI) on a Sun-synchronous low-Earth orbit since 13 October 2017. The S5P mission has acquired more than 5 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 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 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 uncertainty estimates in the middle stratosphere above about 20 km. Around the tropopause and below, the mean chi-square value increases up to about four, meaning that the ex ante TROPOMI uncertainty is underestimated. The information content of the ozone profile retrieval is characterised ...