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| Titel |
Comparison between assimilated and non-assimilated experiments of the MACCii global reanalysis near surface ozone |
| VerfasserIn |
Athanasios Tsikerdekis, Eleni Katragou, Prodromos Zanis, Dimitrios Melas, Henk Eskes, Johannes Flemming, Vincent Huijnen, Antje Inness, Ioannis Kapsomenakis, Martin Schultz, Olaf Stein, Christos Zerefos |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086664
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| Publikation (Nr.) |
 EGU/EGU2014-652.pdf |
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| Zusammenfassung |
| In this work we evaluate near surface ozone concentrations of the MACCii global reanalysis
using measurements from the EMEP and AIRBASE database. The eight-year long
reanalysis of atmospheric composition data covering the period 2003–2010 was
constructed as part of the FP7-funded Monitoring Atmospheric Composition and
Climate project by assimilating satellite data into a global model and data assimilation
system (Inness et al., 2013). The study mainly focuses in the differences between the
assimilated and the non-assimilated experiments and aims to identify and quantify
any improvements achieved by adding data assimilation to the system. Results are
analyzed in eight European sub-regions and region-specific Taylor plots illustrate
the evaluation and the overall predictive skill of each experiment. The diurnal and
annual cycles of near surface ozone are evaluated for both experiments. Furthermore
ozone exposure indices for crop growth (AOT40), human health (SOMO35) and the
number of days that 8-hour ozone averages exceeded 60ppb and 90ppb have been
calculated for each station based on both observed and simulated data. Results
indicate mostly improvement of the assimilated experiment with respect to the
high near surface ozone concentrations, the diurnal cycle and range and the bias in
comparison to the non-assimilated experiment. The limitations of the comparison between
assimilated and non-assimilated experiments for near surface ozone are also discussed. |
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