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Validation of the IASI FORLI/Eumetsat ozone products using satellite (GOME-2), ground-based (Brewer-Dobson, SAOZ) and ozonesonde measurements

Boynard, A. and Hurtmans, D. and Garane, Katerina and Goutail, F. and Hadji-Lazaro, J. and Koukouli, M. and Wespes, C. and Keppens, Arno and Pommereau, J. P. and Pazmino, Andrea and Balis, Dimitris and Loyola, Diego and Valks, Pieter and Coheur, P.-F. and Clerbaux, C. (2018) Validation of the IASI FORLI/Eumetsat ozone products using satellite (GOME-2), ground-based (Brewer-Dobson, SAOZ) and ozonesonde measurements. Atmospheric Measurement Techniques (AMT), 11, pp. 5125-5152. Copernicus Publications. DOI: 10.5194/amt-11-5125-2018 ISSN 1867-1381

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Official URL: https://www.atmos-meas-tech.net/11/5125/2018/amt-11-5125-2018.pdf

Abstract

This paper assesses the quality of IASI/Metop-A (IASI-A) and IASI/Metop-B (IASI-B) ozone (O3) products (total and partial O3 columns) retrieved with the Fast Optimal Retrievals on Layers for IASI Ozone (FORLI-O3) v20151001 software for nine years (2008–2017) through an extensive inter-comparison and validation exercise using independent observations (satellite, ground-based and ozonesonde). IASI-A and IASI-B Total O3 Columns (TOCs) are generally consistent, with a global mean difference less than 0.3 % for both day- and nighttime measurements, IASI-A being slightly higher than IASI-B. A global difference less than 2.4 % is found for the tropospheric (TROPO) O3 column product (IASI-A being lower than IASI-B), which is partly due to a temporary issue related to IASI-A viewing angle in 2015. Our validation shows that IASI-A and IASI-B TOCs are consistent with GOME-2, Dobson, Brewer and SAOZ retrieved ones, with global mean differences in the range 0.1–2 % depending on the instruments. The IASI-A and ground-based TOC comparison for the period 2008–July 2017 shows good long-term stability (negative trends within 3 % decade−1). The comparison results between IASI-A and IASI-B against smoothed ozonesonde partial O3 columns vary in altitude and latitude, with maximum standard deviation for the 300–150 hPa column (20–40 %) due to strong ozone variability and a priori uncertainty. The worst agreement with the ozonesondes and with UV-vis retrieved TOC [satellite and ground] is found at the southern high latitudes. Compared to ozonesonde data, IASI-A and IASI-B O3 products overestimate the O3 abundance in the stratosphere (up to 20 % for the 150–25 hPa column) and underestimates the O3 abundance in the troposphere (within 10 % for the mid-latitudes and ~ 18 % for the tropics). Based on the period 2011–2016, non-significant drift is found for the northern hemispheric tropospheric columns while a small drift prevails for the period before 2011.

Item URL in elib:https://elib.dlr.de/119491/
Document Type:Article
Title:Validation of the IASI FORLI/Eumetsat ozone products using satellite (GOME-2), ground-based (Brewer-Dobson, SAOZ) and ozonesonde measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Boynard, A.LATMOSUNSPECIFIED
Hurtmans, D.ULB, Brussel, BUNSPECIFIED
Garane, KaterinaauthUNSPECIFIED
Goutail, F.LATMOS, CNRS, FranceUNSPECIFIED
Hadji-Lazaro, J.LATMOSUNSPECIFIED
Koukouli, M.AUTHUNSPECIFIED
Wespes, C.Catherine.Wespes (at) ulb.ac.beUNSPECIFIED
Keppens, ArnoBIRA-IASBUNSPECIFIED
Pommereau, J. P.LATMOSUNSPECIFIED
Pazmino, AndreaLATMOSUNSPECIFIED
Balis, DimitrisAUTHUNSPECIFIED
Loyola, DiegoDLR-IMFUNSPECIFIED
Valks, PieterDLR-IMFUNSPECIFIED
Coheur, P.-F.ULB, Brussel, BUNSPECIFIED
Clerbaux, C.LATMOSUNSPECIFIED
Date:10 September 2018
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:11
DOI :10.5194/amt-11-5125-2018
Page Range:pp. 5125-5152
Publisher:Copernicus Publications
ISSN:1867-1381
Status:Published
Keywords:ozone, satellite, IASI, Validation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Valks, Dr. Pieter
Deposited On:09 Jul 2018 12:41
Last Modified:30 Oct 2018 14:08

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