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TROPOMI/S5P total ozone column data: global ground-based validation and consistency with other satellite missions

Garane, Katerina and Koukouli, Maria-Elissavet and Verhoelst, Tijl and Lerot, Christophe and Heue, Klaus-Peter and Fioletov, Vitali and Balis, Dimitrios and Bais, Alkiviadis and Bazureau, Ariane and Dehn, Angelika and Goutail, Florence and Granville, Jose and Griffin, Debora and Hubert, Daan and Keppens, Arno and Lambert, Jean-Christopher and Loyola, Diego and McLinden, Chris and Pazmino, Andrea and Pommereau, Jean-Pierre and Redondas, Alberto and Romahn, Fabian and Valks, Pieter and Van Roozendael, Michel and Xu, Jian and Zehner, Claus and Zerefos, Christos and Zimmer, Walter (2019) TROPOMI/S5P total ozone column data: global ground-based validation and consistency with other satellite missions. Atmospheric Measurement Techniques (AMT), 12 (10), pp. 5263-5287. Copernicus Publications. doi: 10.5194/amt-12-5263-2019. ISSN 1867-1381.

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Official URL: http://dx.doi.org/10.5194/amt-12-5263-2019


n October 2017, the Sentinel-5 Precursor (S5P) mission was launched, carrying the TROPOspheric Monitoring Instrument (TROPOMI), which provides a daily global coverage at a spatial resolution as high as 7 km × 3.5 km and is expected to extend the European atmospheric composition record initiated with GOME/ERS-2 in 1995, enhancing our scientific knowledge of atmospheric processes with its unprecedented spatial resolution. Due to the ongoing need to understand and monitor the recovery of the ozone layer, as well as the evolution of tropospheric pollution, total ozone remains one of the leading species of interest during this mission. In this work, the TROPOMI near real time (NRTI) and offline (OFFL) total ozone column (TOC) products are presented and compared to daily ground-based quality-assured Brewer and Dobson TOC measurements deposited in the World Ozone and Ultraviolet Radiation Data Centre (WOUDC). Additional comparisons to individual Brewer measurements from the Canadian Brewer Network and the European Brewer Network (Eubrewnet) are performed. Furthermore, twilight zenith-sky measurements obtained with ZSL-DOAS (Zenith Scattered Light Differential Optical Absorption Spectroscopy) instruments, which form part of the SAOZ network (Système d'Analyse par Observation Zénitale), are used for the validation. The quality of the TROPOMI TOC data is evaluated in terms of the influence of location, solar zenith angle, viewing angle, season, effective temperature, surface albedo and clouds. For this purpose, globally distributed ground-based measurements have been utilized as the background truth. The overall statistical analysis of the global comparison shows that the mean bias and the mean standard deviation of the percentage difference between TROPOMI and ground-based TOC is within 0 -1.5 % and 2.5 %-4.5 %, respectively. The mean bias that results from the comparisons is well within the S5P product requirements, while the mean standard deviation is very close to those limits, especially considering that the statistics shown here originate both from the satellite and the ground-based measurements. Additionally, the TROPOMI OFFL and NRTI products are evaluated against already known spaceborne sensors, namely, the Ozone Mapping Profiler Suite, on board the Suomi National Polar-orbiting Partnership (OMPS/Suomi-NPP), NASA v2 TOCs, and the Global Ozone Monitoring Experiment 2 (GOME-2), on board the Metop-A (GOME-2/Metop-A) and Metop-B (GOME-2/Metop-B) satellites. This analysis shows a very good agreement for both TROPOMI products with well-established instruments, with the absolute differences in mean bias and mean standard deviation being below +0.7 % and 1 %, respectively. These results assure the scientific community of the good quality of the TROPOMI TOC products during its first year of operation and enhance the already prevalent expectation that TROPOMI/S5P will play a very significant role in the continuity of ozone monitoring from space.

Item URL in elib:https://elib.dlr.de/130476/
Document Type:Article
Title:TROPOMI/S5P total ozone column data: global ground-based validation and consistency with other satellite missions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Garane, KaterinaLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki,https://orcid.org/0000-0002-7113-4079
Koukouli, Maria-ElissavetAUTHhttps://orcid.org/0000-0002-7509-4027
Verhoelst, TijlRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0003-0163-9984
Heue, Klaus-PeterDLR-IMFhttps://orcid.org/0000-0001-8823-7712
Fioletov, VitaliEnvironment Climate Change Canada, Toronto, Ontario, Canadahttps://orcid.org/0000-0002-2731-5956
Balis, DimitriosLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greecehttps://orcid.org/0000-0003-1161-7746
Bais, AlkiviadisLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, Greecehttps://orcid.org/0000-0003-3899-2001
Goutail, FlorenceLATMOShttps://orcid.org/0000-0002-1431-1542
Griffin, DeboraEnvironment Climate Change Canada, Toronto, Ontario, Canadahttps://orcid.org/0000-0002-4849-9125
Hubert, DaanRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0002-4365-865X
Keppens, ArnoRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0002-9544-6392
Lambert, Jean-ChristopherBIRA-IASBUNSPECIFIED
Loyola, DiegoDiego.Loyola (at) dlr.dehttps://orcid.org/0000-0002-8547-9350
McLinden, ChrisEnvironment Climate Change Canada, Toronto, Ontario, Canadahttps://orcid.org/0000-0001-5054-1380
Pommereau, Jean-PierreLATMOShttps://orcid.org/0000-0002-8285-9526
Redondas, AlbertoAEMEThttps://orcid.org/0000-0002-4826-6823
Xu, JianDLR-IMF-ATPhttps://orcid.org/0000-0003-2348-125X
Zerefos, ChristosAcademy of Athens, GreeceUNSPECIFIED
Date:2 October 2019
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/amt-12-5263-2019
Page Range:pp. 5263-5287
Publisher:Copernicus Publications
Keywords:Satelliten Validierung
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):Vorhaben Spectroscopic Methods in Remote Sensing (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Heue, Klaus-Peter
Deposited On:14 Nov 2019 11:52
Last Modified:10 Jan 2020 13:16

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