Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products
The GOME-type Total Ozone Essential Climate Variable (GTO-ECV) is a level-3 data record, which combines individual sensor products into one single cohesive record covering the 22-year period from 1995 to 2016, generated in the frame of the European Space Agency's Climate Change Initiative Ph...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-03-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/11/1385/2018/amt-11-1385-2018.pdf |
| _version_ | 1819098286657634304 |
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| author | K. Garane C. Lerot M. Coldewey-Egbers T. Verhoelst M. E. Koukouli I. Zyrichidou D. S. Balis T. Danckaert F. Goutail J. Granville D. Hubert A. Keppens J.-C. Lambert D. Loyola J.-P. Pommereau M. Van Roozendael C. Zehner |
| author_facet | K. Garane C. Lerot M. Coldewey-Egbers T. Verhoelst M. E. Koukouli I. Zyrichidou D. S. Balis T. Danckaert F. Goutail J. Granville D. Hubert A. Keppens J.-C. Lambert D. Loyola J.-P. Pommereau M. Van Roozendael C. Zehner |
| author_sort | K. Garane |
| collection | DOAJ |
| description | The GOME-type Total Ozone Essential Climate Variable (GTO-ECV) is a level-3
data record, which combines individual sensor products into one single
cohesive record covering the 22-year period from 1995 to 2016, generated in
the frame of the European Space Agency's Climate Change Initiative Phase II.
It is based on level-2 total ozone data produced by the GODFIT (GOME-type
Direct FITting) v4 algorithm as applied to the GOME/ERS-2, OMI/Aura,
SCIAMACHY/Envisat and GOME-2/Metop-A and Metop-B observations. In this paper
we examine whether GTO-ECV meets the specific requirements set by the
international climate–chemistry modelling community for decadal stability
long-term and short-term accuracy. In the following, we present the
validation of the 2017 release of the Climate Research Data Package Total
Ozone Column (CRDP TOC) at both level 2 and level 3. The inter-sensor
consistency of the individual level-2 data sets has mean differences
generally within 0.5 % at moderate latitudes (±50°),
whereas the level-3 data sets show mean differences with respect to the OMI
reference data record that span between −0.2 ± 0.9 % (for GOME-2B)
and 1.0 ± 1.4 % (for SCIAMACHY). Very similar findings are reported
for the level-2 validation against independent ground-based TOC observations
reported by Brewer, Dobson and SAOZ instruments: the mean bias between GODFIT
v4 satellite TOC and the ground instrument is well within 1.0 ± 1.0 %
for all sensors, the drift per decade spans between −0.5 % and 1.0 ± 1.0 % depending on the sensor, and the peak-to-peak seasonality of the
differences ranges from ∼ 1 % for GOME and OMI to
∼ 2 % for SCIAMACHY. For the level-3 validation, our first goal was to show that the level-3 CRDP produces findings consistent with the level-2 individual sensor comparisons.
We show a very good agreement
with 0.5 to 2 % peak-to-peak amplitude for the monthly mean difference
time series and a negligible drift per decade of the differences in the Northern Hemisphere
of −0.11 ± 0.10 % decade<sup>−1</sup> for Dobson and +0.22 ± 0.08 % decade<sup>−1</sup>
for Brewer collocations. The exceptional quality
of the level-3 GTO-ECV v3 TOC record temporal stability satisfies well the
requirements for the total ozone measurement decadal stability of
1–3 % and the short-term and long-term accuracy requirements of 2
and 3 %, respectively, showing a remarkable inter-sensor consistency, both
in the level-2 GODFIT v4 and in the level-3 GTO-ECV v3 datasets, and
thus can be used for longer-term analysis of the ozone layer, such as decadal
trend studies, chemistry–climate model evaluation and data assimilation
applications. |
| first_indexed | 2024-12-22T00:28:34Z |
| format | Article |
| id | doaj.art-76795afc27f3456483ef057abdec24b4 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-22T00:28:34Z |
| publishDate | 2018-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-76795afc27f3456483ef057abdec24b42022-12-21T18:45:00ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482018-03-01111385140210.5194/amt-11-1385-2018Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data productsK. Garane0C. Lerot1M. Coldewey-Egbers2T. Verhoelst3M. E. Koukouli4I. Zyrichidou5D. S. Balis6T. Danckaert7F. Goutail8J. Granville9D. Hubert10A. Keppens11J.-C. Lambert12D. Loyola13J.-P. Pommereau14M. Van Roozendael15C. Zehner16Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, GreeceRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumDeutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Methodik der Fernerkundung (IMF), 82234 Oberpfaffenhofen, GermanyRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, GreeceLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, GreeceLaboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, GreeceRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumLATMOS, CNRS, University Versailles Saint-Quentin-en-Yvelines, Guyancourt, FranceRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumDeutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Methodik der Fernerkundung (IMF), 82234 Oberpfaffenhofen, GermanyLATMOS, CNRS, University Versailles Saint-Quentin-en-Yvelines, Guyancourt, FranceRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), 3, Avenue Circulaire, 1180 Brussels, BelgiumEuropean Space Agency, ESRIN, Frascati, ItalyThe GOME-type Total Ozone Essential Climate Variable (GTO-ECV) is a level-3 data record, which combines individual sensor products into one single cohesive record covering the 22-year period from 1995 to 2016, generated in the frame of the European Space Agency's Climate Change Initiative Phase II. It is based on level-2 total ozone data produced by the GODFIT (GOME-type Direct FITting) v4 algorithm as applied to the GOME/ERS-2, OMI/Aura, SCIAMACHY/Envisat and GOME-2/Metop-A and Metop-B observations. In this paper we examine whether GTO-ECV meets the specific requirements set by the international climate–chemistry modelling community for decadal stability long-term and short-term accuracy. In the following, we present the validation of the 2017 release of the Climate Research Data Package Total Ozone Column (CRDP TOC) at both level 2 and level 3. The inter-sensor consistency of the individual level-2 data sets has mean differences generally within 0.5 % at moderate latitudes (±50°), whereas the level-3 data sets show mean differences with respect to the OMI reference data record that span between −0.2 ± 0.9 % (for GOME-2B) and 1.0 ± 1.4 % (for SCIAMACHY). Very similar findings are reported for the level-2 validation against independent ground-based TOC observations reported by Brewer, Dobson and SAOZ instruments: the mean bias between GODFIT v4 satellite TOC and the ground instrument is well within 1.0 ± 1.0 % for all sensors, the drift per decade spans between −0.5 % and 1.0 ± 1.0 % depending on the sensor, and the peak-to-peak seasonality of the differences ranges from ∼ 1 % for GOME and OMI to ∼ 2 % for SCIAMACHY. For the level-3 validation, our first goal was to show that the level-3 CRDP produces findings consistent with the level-2 individual sensor comparisons. We show a very good agreement with 0.5 to 2 % peak-to-peak amplitude for the monthly mean difference time series and a negligible drift per decade of the differences in the Northern Hemisphere of −0.11 ± 0.10 % decade<sup>−1</sup> for Dobson and +0.22 ± 0.08 % decade<sup>−1</sup> for Brewer collocations. The exceptional quality of the level-3 GTO-ECV v3 TOC record temporal stability satisfies well the requirements for the total ozone measurement decadal stability of 1–3 % and the short-term and long-term accuracy requirements of 2 and 3 %, respectively, showing a remarkable inter-sensor consistency, both in the level-2 GODFIT v4 and in the level-3 GTO-ECV v3 datasets, and thus can be used for longer-term analysis of the ozone layer, such as decadal trend studies, chemistry–climate model evaluation and data assimilation applications.https://www.atmos-meas-tech.net/11/1385/2018/amt-11-1385-2018.pdf |
| spellingShingle | K. Garane C. Lerot M. Coldewey-Egbers T. Verhoelst M. E. Koukouli I. Zyrichidou D. S. Balis T. Danckaert F. Goutail J. Granville D. Hubert A. Keppens J.-C. Lambert D. Loyola J.-P. Pommereau M. Van Roozendael C. Zehner Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products Atmospheric Measurement Techniques |
| title | Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products |
| title_full | Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products |
| title_fullStr | Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products |
| title_full_unstemmed | Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products |
| title_short | Quality assessment of the Ozone_cci Climate Research Data Package (release 2017) – Part 1: Ground-based validation of total ozone column data products |
| title_sort | quality assessment of the ozone cci climate research data package release 2017 part 1 ground based validation of total ozone column data products |
| url | https://www.atmos-meas-tech.net/11/1385/2018/amt-11-1385-2018.pdf |
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