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| Titel |
Measurements of total and tropospheric ozone from IASI: comparison with correlative satellite, ground-based and ozonesonde observations |
| VerfasserIn |
A. Boynard, C. Clerbaux, P.-F. Coheur, D. Hurtmans, S. Turquety, M. George, J. Hadji-Lazaro, C. Keim, J. Meyer-Arnek |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 16 ; Nr. 9, no. 16 (2009-08-31), S.6255-6271 |
| Datensatznummer |
250007598
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| Publikation (Nr.) |
 copernicus.org/acp-9-6255-2009.pdf |
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| Zusammenfassung |
| In this paper, we present measurements of total and tropospheric ozone,
retrieved from infrared radiance spectra recorded by the Infrared
Atmospheric Sounding Interferometer (IASI), which was launched on board the
MetOp-A European satellite in October 2006. We compare IASI total ozone
columns to Global Ozone Monitoring Experiment-2 (GOME-2) observations and
ground-based measurements from the Dobson and Brewer network for one full
year of observations (2008). The IASI total ozone columns are shown to be in
good agreement with both GOME-2 and ground-based data, with correlation
coefficients of about 0.9 and 0.85, respectively. On average, IASI ozone
retrievals exhibit a positive bias of about 9 DU (3.3%) compared to both
GOME-2 and ground-based measurements. In addition to total ozone columns,
the good spectral resolution of IASI enables the retrieval of tropospheric
ozone concentrations. Comparisons of IASI tropospheric columns to 490
collocated ozone soundings available from several stations around the globe
have been performed for the period of June 2007–August 2008. IASI
tropospheric ozone columns compare well with sonde observations, with
correlation coefficients of 0.95 and 0.77 for the [surface–6 km] and
[surface–12 km] partial columns, respectively. IASI retrievals tend to
overestimate the tropospheric ozone columns in comparison with ozonesonde
measurements. Positive average biases of 0.15 DU (1.2%) and 3 DU (11%)
are found for the [surface–6 km] and for the [surface–12 km]
partial columns respectively. |
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