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https://doi.org/10.5194/amt-2017-447
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Jan 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
Quality assessment of the Ozone_cci Climate Research Data Package (release 2017): 2. Ground-based validation of nadir ozone profile data products
Arno Keppens1, Jean-Christopher Lambert1, José Granville1, Daan Hubert1, Tijl Verhoelst1, Steven Compernolle1, Barry Latter2, Brian Kerridge2, Richard Siddans2, Anne Boynard3,4, Juliette Hadji-Lazaro3, Cathy Clerbaux3,5, Catherine Wespes5, Daniel R. Hurtmans5, Pierre-François Coheur5, Jacob C. A. van Peet6, Ronald J. van der A6, Katerina Garane7, Maria Elissavet Koukouli7, Dimitris S. Balis7, Andy Delcloo8, Rigel Kivi9, Réné Stübi10, Sophie Godin-Beekmann3, Michel Van Roozendael1, and Claus Zehner11 1Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, 1180, Belgium
2Rutherford Appleton Laboratory (RAL) & National Centre for Earth Observation (NCEO), Chilton, Didcot, OX11, UK
3LATMOS/IPSL, UPMC Univ. Paris 06 Sorbonne Universités, UVSQ, CNRS, Paris, 78280, France
4SPASCIA, Ramonville-Saint-Agne, 31520, France
5Université Libre de Bruxelles (ULB), Brussels, 1050, Belgium
6Royal Netherlands Meteorological Institute (KNMI), De Bilt, 3731, the Netherlands
7Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki (AUTH), Thessaloniki, 54124, Greece
8Royal Meteorological Institute of Belgium (RMIB), Brussels, 1180, Belgium
9Finnish Meteorological Institute (FMI-ARC), Sodankylä, 99601, Finland
10Federal Office of Meteorology and Climatology, Payerne, 1530, Switzerland
11European Space Agency (ESA/ESRIN), Frascati, 00044, Italy
Abstract. Atmospheric ozone plays a key role in air quality and the radiation budget of the Earth, both directly and through its chemical influence on other trace gases. Assessments of the atmospheric ozone distribution and associated climate change therefore demand accurate vertically-resolved ozone observations with both stratospheric and tropospheric sensitivity, both on the global and regional scales, and both in the long term and at shorter timescales. Such observations have been acquired by two series of European nadir-viewing ozone profilers, namely the scattered-light UV-visible spectrometers of the GOME family, launched regularly since 1995 (GOME, SCIAMACHY, OMI, GOME-2A/B, TROPOMI, and the upcoming Sentinel-5 series), and the thermal infrared emission sounders of the IASI type, launched regularly since 2006 (IASI on Metop platforms and the upcoming IASI-NG on Metop-SG). In particular, several Level-2 retrieved, Level-3 monthly gridded, and Level-4 assimilated nadir ozone profile data products have been improved and harmonised in the context of the ozone project of the European Space Agency’s Climate Change Initiative (ESA Ozone_cci). To verify their fitness-for-purpose, these ozone datasets must undergo a comprehensive quality assessment (QA), including (a) detailed identification of their geographical, vertical and temporal domains of validity, (b) quantification of their potential bias, noise and drift and their dependences on major influence quantities, and (c) assessment of the mutual consistency of data from different sounders. For this purpose we have applied to the Ozone_cci Climate Research Data Package (CRDP) released in 2017 the versatile QA/validation system Multi-TASTE which has been developed in the context of several heritage projects (ESA’s Multi-TASTE, EUMETSAT’s O3M-SAF, and the European Commission’s FP6 GEOmon and FP7 QA4ECV). This work, as the second in a series of four Ozone_cci validation papers, reports for the first time on data content studies, information content studies and ground-based validation for both the GOME- and IASI-type climate data records combined. The ground-based reference measurements have been provided by the Network for the Detection of Atmospheric Composition Change (NDACC), NASA’s Southern Hemisphere Additional Ozonesonde programme (SHADOZ), and other ozonesonde and lidar stations contributing to the World Meteorological Organisation’s Global Atmosphere Watch (WMO GAW). Dependence of the Ozone_cci data quality on major influence quantities – resulting in data screening suggestions to users – and perspectives for the Copernicus Sentinel missions are discussed.

Citation: Keppens, A., Lambert, J.-C., Granville, J., Hubert, D., Verhoelst, T., Compernolle, S., Latter, B., Kerridge, B., Siddans, R., Boynard, A., Hadji-Lazaro, J., Clerbaux, C., Wespes, C., Hurtmans, D. R., Coheur, P.-F., van Peet, J. C. A., van der A, R. J., Garane, K., Koukouli, M. E., Balis, D. S., Delcloo, A., Kivi, R., Stübi, R., Godin-Beekmann, S., Van Roozendael, M., and Zehner, C.: Quality assessment of the Ozone_cci Climate Research Data Package (release 2017): 2. Ground-based validation of nadir ozone profile data products, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-447, in review, 2018.
Arno Keppens et al.
Arno Keppens et al.
Arno Keppens et al.

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Short summary
This work, performed at the Royal Belgian Institute for Space Aeronomy and the second in a series of four Ozone_cci papers, reports for the first time on data content studies, information content studies, and comparisons with co-located ground-based reference observations for all thirteen nadir ozone profile data products that are part of the Climate Research Data Package (CRDP) on atmospheric ozone of the European Space Agency’s Climate Change Initiative.
This work, performed at the Royal Belgian Institute for Space Aeronomy and the second in a...
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