3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model
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| Title: | Main Title: 3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model |
| Description: | Abstract: A detailed 3-D evaluation of an ensemble of five regional Chemistry Transport Models (RCTM) and one global CTM with focus on free tropospheric ozone over Europe is presented. It is performed over a summer period (June to August 2008) in the context of the GEMS-RAQ project. A data set of about 400 vertical ozone profiles from balloon soundings and commercial aircraft at 11 different locations is used for model evaluation, in addition to satellite measurements with the infrared nadir sounder (IASI) showing largest sensitivity to free tropospheric ozone. In the middle troposphere, the four regional models using the same top and boundary conditions from IFS-MOZART exhibit a systematic negative bias with respect to observed profiles of about −20 %. Root Mean Square Error (RMSE) values are constantly growing with altitude, from 22% to 32% to 53 %, respectively for 0–2 km, 2–8 km and 8–10 km height ranges. Lowest correlation is found in the middle troposphere, with minimum coefficients (R) between 0.2 to 0.45 near 8 km, as compared to 0.7 near the surface and similar values around 10 km. A sensitivity test made with the CHIMERE mode also shows that using hourly instead of monthly chemical boundary conditions generally improves the model skill (i.e. improve RMSE and correlation). Lower tropospheric 0–6 km partial ozone columns derived from IASI show a clear North- South gradient over Europe, which is qualitatively reproduced by the models. Also the temporal variability showing decreasing ozone concentrations in the lower troposphere (0– 6 km columns) during summer is well reproduced by models even if systematic bias remains (the value of the bias being also controlled by the type of used boundary conditions). A multi-day case study of a trough with low tropopause was conducted and showed that both IASI and models were able to resolve strong horizontal gradients of middle and upper tropospheric ozone occurring in the vicinity of an upper tropospheric frontal zone. |
| Identifier: | 10.5194/acp-12-3219-2012 (DOI) |
Responsible Party
| Creators: | D. Zyryanov (Author), Gilles Foret (Author), Maxim Eremenko (Author), Matthias Beekmann (Author), Jean Pierre Cammas (Author), Massimo D’Isidoro (Author), Hendrik Elbern (Author), Johannes Flemming (Author), Elmar Friese (Author), Ioannis Kioutsoukis (Author), Alberto Maurizi (Author), Dimitrios Melas (Author), Frederik Meleux (Author), Laurent Menut (Author), Philippe Moinat (Author), Vincent Henri Peuch (Author), Anastasia Poupkou (Author), Miha Razinger (Author), Martin Schultz (Author), Olaf Stein (Author), Martin Suttie (Author), A. Valdebenito (Author), Christos Zerefos (Author), Gaelle Dufour (Author), Gilles Bergametti (Author), Jean Marie Flaud (Author) |
| Publisher: | European Geosciences Union |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Atmosphere |
| Related Subproject: | D3 |
| Subjects: | Keywords: Chemistry, Atmosphere |
File Details
| Filename: | 2012_Zyryanov_ACP.pdf |
| Data Type: | Text - Article |
| Size: | 22 Pages |
| File Size: | 4.8 MB |
| Dates: | Accepted: 23.03.2012 Issued: 03.04.2012 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Atmospheric Chemistry and Physics |
| Source Website: | www.atmos-chem-phys.net |
| Volume: | 12 |
| Number of Pages: | 22 (3219 - 3240) |
Metadata Details
| Metadata Creator: | Hendrik Elbern |
| Metadata Created: | 03.12.2013 |
| Metadata Last Updated: | 03.12.2013 |
| Subproject: | D3 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 916 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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