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| Titel |
Construction of merged satellite total O3 and NO2 time series in the tropics for trend studies and evaluation by comparison to NDACC SAOZ measurements |
| VerfasserIn |
M. Pastel, J.-P. Pommereau, F. Goutail, A. Richter, A. Pazmino, D. Ionov, T. Portafaix |
| 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. 10 ; Nr. 7, no. 10 (2014-10-07), S.3337-3354 |
| Datensatznummer |
250115922
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| Publikation (Nr.) |
 copernicus.org/amt-7-3337-2014.pdf |
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| Zusammenfassung |
| Long time series of ozone and NO2 total column measurements in the
southern tropics are available from two ground-based SAOZ (Système
d'Analyse par Observation Zénithale) UV-visible spectrometers operated
within the Network for the Detection of Atmospheric Composition Change
(NDACC) in Bauru (22° S, 49° W) in S-E Brazil since 1995
and Reunion Island (21° S, 55° E) in the S-W Indian
Ocean since 1993. Although the stations are located at the same latitude,
significant differences are observed in the columns of both species,
attributed to differences in tropospheric content and equivalent latitude in
the lower stratosphere. These data are used to identify which satellites
operating during the same period, are capturing the same features and are
thus best suited for building reliable merged time series for trend studies.
For ozone, the satellites series best matching SAOZ observations are EP-TOMS (1995–2004) and OMI-TOMS (2005–2011), whereas for NO2,
best results are obtained by combining GOME version GDP5 (1996–2003) and SCIAMACHY – IUP (2003–2011), displaying lower noise and seasonality
in reference to SAOZ.
Both merged
data sets are fully consistent with the larger columns of the two species
above South America and the seasonality of the differences between the two
stations, reported by SAOZ, providing reliable time series for further trend
analyses and identification of sources of interannual variability in the
future analysis. |
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