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| Titel |
GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system |
| VerfasserIn |
N. Hao, M. E. Koukouli, A. Inness, P. Valks, D. G. Loyola, W. Zimmer, D. S. Balis, I. Zyrichidou, M. Van Roozendael, C. Lerot, R. J. D. Spurr |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 9 ; Nr. 7, no. 9 (2014-09-12), S.2937-2951 |
| Datensatznummer |
250115897
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| Publikation (Nr.) |
 copernicus.org/amt-7-2937-2014.pdf |
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| Zusammenfassung |
| The two Global Ozone Monitoring Instrument (GOME-2) sensors operated in
tandem are flying onboard EUMETSAT's (European Organisation for the Exploitation of Meteorological Satellites) MetOp-A and MetOp-B satellites,
launched in October 2006 and September 2012 respectively. This paper
presents 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 latest version of the GOME
Data Processor (GDP version 4.7). 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 using ground-based measurements
show that on average the GOME-2B total ozone data obtained with GDP 4.7 are
slightly higher than, both, 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 systematic effects, which
has been illustrated for the Antarctic ozone hole on 18 October 2013.
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. |
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