[708] - 3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model

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Zyryanov, D., Foret, G., Eremenko, M., Beekmann, M., Cammas, J. P., D’Isidoro, M., Elbern, H., Flemming, J., Friese, E., Kioutsoukis, I., Maurizi, A., Melas, D., Meleux, F., Menut, L., Moinat, P., Peuch, V. H., Poupkou, A., Razinger, M., Schultz, M., Stein, O., Suttie, M., Valdebenito, A., Zerefos, C., Dufour, G., Bergametti, G., Flaud, J. M., 2012. 3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model. Atmospheric Chemistry and Physics, 12, 3219 - 3240. DOI: 10.5194/acp-12-3219-2012.
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Title(s):Main Title: 3-D evaluation of tropospheric ozone simulations by an ensemble of regional Chemistry Transport Model
Description(s):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(s):DOI: 10.5194/acp-12-3219-2012
Responsible Party
Creator(s):Author: 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
Publisher:European Geosciences Union
TR32 Topic:Atmosphere
Subject(s):CRC/TR32 Keywords: Chemistry, Atmosphere
File Details
File Name:2012_Zyryanov_ACP.pdf
Data Type:Text
Size(s):22 Pages
File Size:4923 kB (4.808 MB)
Date(s):Date Accepted: 2012-03-23
Issued: 2012-04-03
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Other
Measurement Location:--Other--
Specific Informations - Publication
Article Type:Journal
Source:Atmospheric Chemistry and Physics
Number Of Pages:22
Page Range:3219 - 3240
Metadata Details
Metadata Creator:Hendrik Elbern
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-12
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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