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GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system

Hao, Nan and Koukouli, M. and Inness, A. and Valks, Pieter and Loyola, Diego and Zimmer, Walter and Balis, Dimitris and Zyrichidou, I. and Van Roozendael, Michel and Lerot, C. and Spurr, Robert (2014) GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system. EUMETSAT 2014, 22-26, Sep., 2014, Geneva, Switzerland.

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The two Global Ozone Monitoring Instrument (GOME-2) sensors operated in tandem are flying onboard EUMETSAT’s MetOp-A and MetOp-B satellites, launched in October 2006 and September 2012 respectively. Here we present the operational GOME-2/MetOp-A (GOME-2A) and GOME-2/MetOp-B (GOME-2B) total ozone products provided by the EUMETSAT Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M-SAF). These products are generated using the retrieval algorithm GOME Data Processor (GDP) version 4.7, the latest version of the GDP 4.x algorithm, which was also employed for the generation of Level 2 total ozone and other trace gas products from GOME/ERS-2 and SCIAMACHY/ENVISAT. The enhancements in GDP 4.7, including the application of Brion-Daumont-Malicet ozone absorption cross-sections, are presented here. On a global scale, GOME-2B has the same high accuracy as the corresponding GOME-2A products. There is an excellent agreement between the ozone total columns from the two sensors, with GOME-2B values slightly lower with a mean difference of only 0.55±0.29%. First global validation results for 6 months of GOME-2B total ozone measurements using Brewer and Dobson measurements as references are also presented. On average the GOME-2B total ozone data obtained with GDP 4.7 slightly overestimate Dobson observations by about 2.0±1.0% and Brewer observations by about 1.0±0.8%. It is concluded that the total ozone columns (TOCs) provided by GOME-2A and GOME-2B are consistent and may be used simultaneously without introducing trends or other systematic effects. GOME-2A total ozone data have been used operationally in the Copernicus atmospheric service project MACC-II (Monitoring Atmospheric Composition and Climate - Interim Implementation) near-real-time (NRT) system since October 2013. The magnitude of the bias correction needed for assimilating GOME-2A ozone is reduced (to about -6 DU in the global mean) when the GOME-2 ozone retrieval algorithm changed to GDP 4.7.

Item URL in elib:https://elib.dlr.de/94948/
Document Type:Conference or Workshop Item (Lecture)
Title:GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hao, Nannan.hao (at) dlr.deUNSPECIFIED
Valks, Pieterpieter.valks (at) dlr.deUNSPECIFIED
Loyola, Diegodiego.loyola (at) dlr.deUNSPECIFIED
Zimmer, WalterWalter.Zimmer (at) dlr.deUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:ozone, GOME-2, MACC, MetOp
Event Title:EUMETSAT 2014
Event Location:Geneva, Switzerland
Event Type:international Conference
Event Dates:22-26, Sep., 2014
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 - Vorhaben Ozon-SAF (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Atmosphere
Deposited By: Hao, Dr. Nan
Deposited On:05 Feb 2015 10:35
Last Modified:05 Feb 2015 10:35

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