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| Titel |
Spatial patterns of observed and modelled total ozone trends 1995-2009 |
| VerfasserIn |
Melanie Coldewey-Egbers, Diego Loyola, Walter Zimmer, Michel Van Roozendael, Christophe Lerot, Martin Dameris, Hella Garny, Peter Braesicke, MariLiza Koukouli, Dimitris Balis |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050988
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| Zusammenfassung |
| The European satellite-borne sensors GOME/ERS-2, SCIAMACHY/ENVISAT, and GOME-2/METOP provide an accurate global total ozone data record starting in June 1995. We present a monthly-mean averaged ozone product, which has been developed in the framework of ESA's Climate Change Initiative. It is called GOME-type Total Ozone - Essential Climate Variable (GTO-ECV), and it is constructed by merging those measurements. Due to its excellent long-term stability the GOME data record is used as a reference standard, while SCIAMACHY and GOME-2 observations are adjusted using correction factors obtained with an extensive intercomparison and analysis.
Such high-quality and homogeneous data sets are required to analyse the long-term behaviour of the stratospheric ozone content and detect statistically significant changes. A multiple linear least-squares regression algorithm using different explanatory variables is applied to the monthly-mean ozone product. Spatial patterns of ozone trends as well as the influence of changes in the chemical and dynamical structure of the atmosphere are analysed.
Global trend estimates are also compared to long-term simulations obtained with two recent Chemistry-Climate Models (E39C-A and UMUKCA-UCAM), and total ozone observations of individual Dobson/Brewer ground instruments for selected geographical regions. |
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