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WG4: Evaluation, validation and applications

Integrated meteorology-atmospheric chemistry models for the regional scale have been developed only recently and most modeling systems are still in a premature, not well tested state. To support the further development and to demonstrate the strengths and identify the weaknesses of current models, a thorough evaluation against observations or other known solutions is of great importance. The overall objective of WG4 is therefore to identify the specific needs for evaluation of integrated meteorology-chemistry models and to develop the necessary tools and methodologies. A further important objective is to provide recommendations on suitable applications of these modeling systems.


Figure: Model evaluation example. Comparison of tropospheric NO2 columns simulated with the COSMO-ART model for two different 20-day periods with corresponding satellite observations by OMI (adapted from Knote et al., Geosci. Model Dev. 2011)

WG4 co-ordinated the European contribution to phase-2 of the Air Quality Modelling Evaluation International Initiative (AQMEII-2). 16 European modeling groups participated in the exercise operating 7 different coupled meteorology-chemistry models allowing for an unprecedented evaluation of this new generation of models and an assessment of the current state-of-the-art in this field. A list of the publications lead by members of WG4 is provided below.

Selected publications

Brunner et al.: Comparative analysis of meteorological performance of coupled chemistry-meteorology models in the context of AQMEII phase 2
Im et al.: Evaluation of operational on-line-coupled regional air quality models over Europe and North America in the context of AQMEII phase 2. Part I: Ozone
Im et al.: Evaluation of operational online-coupled regional air quality models over Europe and North America in the context of AQMEII phase 2. Part II: Particulate matter
Curci et al.: Uncertainties of simulated aerosol optical properties induced by assumptions on aerosol physical and chemical properties: An AQMEII-2 perspective
Balzarini et al.: WRF-Chem model sensitivity to chemical mechanisms choice in reconstructing aerosol optical properties
Baro et al.: Sensitivity analysis of the microphysics scheme in WRF-Chem contributions to AQMEII phase 2.
Giordano et al.: Assessment of the MACC reanalysis and its influence as chemical boundary conditions for regional air quality modeling in AQMEII-2.
Relevant links:
AQMEII - Air Quality Modelling Evaluation International Initiative

Model data base at University of Hamburg:

Meeting minutes:
- AQMEII Workshop, May 8, 2012, Utrecht, The Netherlands
These minutes contain the timeline for the AQMEII model evaluation exercise.
- COST MCM meeting 29-30 May 2012, Copenhagen, Denmark
Pages 8-11 are the minutes of the WG4 side meeting.
Other documents:
-Definition of European model domain
The domain adopted for the European AQMEII simulations is called CORDEX_Europe_new and described on page 5 in this document.