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Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements

Pinardi, G. and Van Roozendael, M. and Hendrick, F. and Richter, A. and Valks, Pieter and Alwarda, R. and Bognar, K. and Friess, Udo and Granville, J. and Gu, Myojeong and Johnston, P. and Prados-Roman, C. and Querel, R. and Strong, K. and Wagner, T. and Wittrock, F. and Yela, M. (2022) Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements. Atmospheric Measurement Techniques (AMT), 15, pp. 3439-3463. Copernicus Publications. doi: 10.5194/amt-15-3439-2022. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/15/3439/2022/

Abstract

This paper reports on ground-based validation of the atmospheric OClO data record produced within the framework of EUMETSAT's Satellite Application Facility on Atmospheric Chemistry Monitoring (AC SAF) using the Global Ozone Monitoring Experiment (GOME)-2A and GOME-2B instrument measurements, covering the 2007–2016 and 2013–2016 periods, respectively. OClO slant column densities are compared to correlative measurements collected from nine Zenith-Scattered-Light Differential Optical Absorption Spectroscopy (ZSL-DOAS) instruments from the Network for the Detection of Atmospheric Composition Change (NDACC) distributed in both the Arctic and Antarctic. Sensitivity tests are performed on the ground-based data to estimate the impact of the different OClO DOAS analysis settings. On this basis, we infer systematic uncertainties of about 25 % (i.e., about 3.75×10^13 molec. cm−2) between the different ground-based data analyses, reaching total uncertainties ranging from about 26 % to 33 % for the different stations (i.e., around 4 to 5×10^13 molec. cm−2). Time series at the different sites show good agreement between satellite and ground-based data for both the inter-annual variability and the overall OClO seasonal behavior. GOME-2A results are found to be noisier than those of GOME-2B, especially after 2011, probably due to instrumental degradation effects. Daily linear regression analysis for OClO-activated periods yield correlation coefficients of 0.8 for GOME-2A and 0.87 for GOME-2B, with slopes with respect to the ground-based data ensemble of 0.64 and 0.72, respectively. Satellite minus ground-based offsets are within 8×10^13 molec. cm−2, with some differences between GOME-2A and GOME-2B depending on the station. Overall, considering all the stations, a median offset of about -2.2×10^13 molec. cm−2 is found for both GOME-2 instruments.

Item URL in elib:https://elib.dlr.de/186912/
Document Type:Article
Title:Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pinardi, G.BIRA-IASB – Royal Belgian Institute for Space Aeronomy, Brussels, BelgiumUNSPECIFIED
Van Roozendael, M.BIRA-IASB – Royal Belgian Institute for Space Aeronomy, Brussels, BelgiumUNSPECIFIED
Hendrick, F.BIRA-IASB – Royal Belgian Institute for Space Aeronomy, Brussels, BelgiumUNSPECIFIED
Richter, A.Institute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Valks, PieterPieter.Valks (at) dlr.dehttps://orcid.org/0000-0002-2846-7863
Alwarda, R.Department of Physics, University of Toronto, Toronto, CanadaUNSPECIFIED
Bognar, K.Department of Physics, University of Toronto, Toronto, CanadaUNSPECIFIED
Friess, UdoUniv. of Heidelberg, HeidelbergUNSPECIFIED
Granville, J.BIRAUNSPECIFIED
Gu, MyojeongMax-Planck-Institut für Chemie (MPIC), Mainz, GermanyUNSPECIFIED
Johnston, P.National Institute of Water & Atmospheric Research (NIWA), Lauder, New ZealandUNSPECIFIED
Prados-Roman, C.National Institute for Aerospace Technology (INTA), Madrid, SpainUNSPECIFIED
Querel, R.National Institute of Water & Atmospheric Research (NIWA), Lauder, New ZealandUNSPECIFIED
Strong, K.Department of Physics, University of Toronto, Toronto, CanadaUNSPECIFIED
Wagner, T.Max-Planck-Institut für Chemie, MainzUNSPECIFIED
Wittrock, F.Institute of Environmental Physics, University of Bremen, Bremen, GermanyUNSPECIFIED
Yela, M.National Institute for Aerospace Technology (INTA), Madrid, SpainUNSPECIFIED
Date:9 June 2022
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:15
DOI :10.5194/amt-15-3439-2022
Page Range:pp. 3439-3463
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:atmospheric OClO, GOME-2, ground-based validation, satellite
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 - Spectroscopic methods of the atmosphere
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Valks, Dr. Pieter
Deposited On:21 Jun 2022 11:14
Last Modified:22 Jun 2022 11:40

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