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Validation of tropospheric NO2 column measurements of GOME-2A and OMI using MAX-DOAS and direct sun network observations

Pinardi, G. and Van Roozendael, M. and Hendrick, F. and Theys, N. and Abuhassan, N. and Bais, A. and Boersma, F. and Cede, A. and Chong, J. and Donner, S. and Drosoglou, T. and Dzhola, A. and Eskes, H. and Frieß, U. and Granville, J. and Herman, J. R. and Holla, R. and Hovila, J. and Irie, H. and Kanaya, Y. and Karagkiozidis, D. and Kouremeti, N. and Lambert, J.-C. and Ma, J. and Peters, E. and Piters, A. and Postylyakov, O. and Richter, A. and Remmers, J. and Takashima, H. and Tiefengraber, M. and Valks, P. and Vlemmix, T. and Wagner, T. and Wittrock, F. (2020) Validation of tropospheric NO2 column measurements of GOME-2A and OMI using MAX-DOAS and direct sun network observations. Atmospheric Measurement Techniques (AMT), 13 (11), pp. 6141-6174. Copernicus Publications. doi: 10.5194/amt-13-6141-2020. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/13/6141/2020/

Abstract

Multi-axis differential optical absorption spectroscopy (MAX-DOAS) and direct sun NO2 vertical column network data are used to investigate the accuracy of tropospheric NO2 column measurements of the GOME-2 instrument on the MetOp-A satellite platform and the OMI instrument on Aura. The study is based on 23 MAX-DOAS and 16 direct sun instruments at stations distributed worldwide. A method to quantify and correct for horizontal dilution effects in heterogeneous NO2 field conditions is proposed. After systematic application of this correction to urban sites, satellite measurements are found to present smaller biases compared to ground-based reference data in almost all cases. We investigate the seasonal dependence of the validation results as well as the impact of using different approaches to select satellite ground pixels in coincidence with ground-based data. In optimal comparison conditions (satellite pixels containing the station) the median bias between satellite tropospheric NO2 column measurements and the ensemble of MAX-DOAS and direct sun measurements is found to be significant and equal to -34 % for GOME-2A and -24 % for OMI. These biases are further reduced to -24 % and -18 % respectively, after application of the dilution correction. Comparisons with the QA4ECV satellite product for both GOME-2A and OMI are also performed, showing less scatter but also a slightly larger median tropospheric NO2 column bias with respect to the ensemble of MAX-DOAS and direct sun measurements.

Item URL in elib:https://elib.dlr.de/138660/
Document Type:Article
Title:Validation of tropospheric NO2 column measurements of GOME-2A and OMI using MAX-DOAS and direct sun network observations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pinardi, G.Royal Belgian Institute for Space Aeronomy, Brussels, BelgiumUNSPECIFIED
Van Roozendael, M.Royal Belgian Institute for Space Aeronomy, Brussels, BelgiumUNSPECIFIED
Hendrick, F.Belgian Institute for Space AeronomyUNSPECIFIED
Theys, N.Belgian Institute for Space AeronomyUNSPECIFIED
Abuhassan, N.NASA Goddard Space Flight Center, Greenbelt, Maryland, USAUNSPECIFIED
Bais, A.Aristotle University of Thessaloniki, GreeceUNSPECIFIED
Boersma, F.Royal Netherlands Meteorological Institute, KNMI, De Bilt, the NetherlandsUNSPECIFIED
Cede, A.LuftBlick Earth Observation Technologies, Mutters, AustriaUNSPECIFIED
Chong, J.Gwangju Institute of Science and Technology GIST, Gwangju, South KoreaUNSPECIFIED
Donner, S.Max Planck Institute for Chemistry, Mainz, GermanyUNSPECIFIED
Drosoglou, T.Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Thessaloniki, GreeceUNSPECIFIED
Dzhola, A.A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, IAP/RAS, Moscow, RussiaUNSPECIFIED
Eskes, H.Royal Dutch Meteorological Institute, KNMI, P.O. Box 201, 3730 AE De Bilt, the NetherlandsUNSPECIFIED
Frieß, U.Institute of Environmental Physics, University of Heidelberg, Heidelberg, GermanyUNSPECIFIED
Granville, J.BIRAUNSPECIFIED
Herman, J. R.NASA Goddard Space Flight Center, Greenbelt, Maryland, USAUNSPECIFIED
Holla, R.Robert.Holla (at) dwd.deUNSPECIFIED
Hovila, J.FMIUNSPECIFIED
Irie, H.Center for Environmental Remote Sensing, Chiba University, Chiba, JapanUNSPECIFIED
Kanaya, Y.Research Institute for Global Change, JAMSTEC, Yokohama, JapanUNSPECIFIED
Karagkiozidis, D.Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, AUTH, Thessaloniki, GreeceUNSPECIFIED
Kouremeti, N.Aristotle Univ. of Thessaloniki, GRUNSPECIFIED
Lambert, J.-C.Belgian Institute for Space Aeronomy, BIRA-IASB, Ringlaan 3, 1080 Brussels, BelgiumUNSPECIFIED
Ma, J.Chinese Academy of Meteorological Sciences, Beijing, ChinaUNSPECIFIED
Peters, E.Institute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Piters, A.Royal Netherlands Meteorological Institute, De Bilt, the NetherlandsUNSPECIFIED
Postylyakov, O.A. M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, RussiaUNSPECIFIED
Richter, A.Inst. f. Umweltphysik, Univ. BremenUNSPECIFIED
Remmers, J.Max Planck Institute for Chemistry, Mainz, GermanyUNSPECIFIED
Takashima, H.Research Institute for Global Change, JAMSTEC, Yokohama, JapanUNSPECIFIED
Tiefengraber, M.LuftBlick Earth Observation Technologies, Mutters, AustriaUNSPECIFIED
Valks, P.pieter.valks (at) dlr.deUNSPECIFIED
Vlemmix, T.Royal Netherlands Meteorological Institute, KNMI, De Bilt, the NetherlandsUNSPECIFIED
Wagner, T.Max Planck Institute for Chemistry, Mainz, GermanyUNSPECIFIED
Wittrock, F.Institute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Date:November 2020
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.5194/amt-13-6141-2020
Page Range:pp. 6141-6174
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:NO2, MAX-DOAS, GOME-2, OMI, Validation
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):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Valks, Dr. Pieter
Deposited On:30 Nov 2020 17:36
Last Modified:30 Nov 2020 17:36

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