the euro- and city-delta model intercomparison exercises p. thunis, k. cuvelier joint research...
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The Euro- and City-Delta model intercomparison exercises
P. Thunis, K. Cuvelier
Joint Research Centre, Ispra
EuroDeltaA project to evaluate uncertainty in modelling source-
receptor relationships used in air quality policy
Organised by:
JRC-IES, IIASA, EMEP, TNO-MEP, CONCAWE, INERIS, SMHI, FUB
Objectives:
• Do regional air quality models produce a consistent response to emission changes ?
• What is the range of modelled responses to emission changes ?
• What are confidence limits for the modelling used in policy ?
CityDeltaA project to include sub-grid effects into a Europe-
wide health impact assessment for PM and O3
Organised by:
JRC-IES, IIASA, EMEP, TNO-MEP, CONCAWE
Objectives: Identify systematic differences (deltas) between rural and urban background AQ (scale)
• How these delta vary in terms of urban emissions?• How these delta vary accross cities?• How these delta vary accross models?• How these delta vary accross pollutants ?
City-Delta CitiesCity-Delta Cities:: Comparisons are conducted for a number of European cities with distinct differences in climatic conditions, geographical settings, and emission densities.
London
Paris
Prague
Berlin
Copenhagen
Katowice
Milan
Marseille
Participating Models
EURODELTA
CHIMERE
REM
EMEP
MATCH
LOTOS
TM5
CITYDELTA
CALGRID MUSE
CAMX TRANSCHIM
MUSCAT EUROS
OFIS MOCAGE
STEM REM
LOTOS CHIMERE
EPISODE EMEP
Emission Scenarios
EURODELTA
• European Wide reductions (from 2000 to 2020 with 2 sets of meteorology)
• Beyond 2020 specific NOx, Sox, NH3 and VOC reductions for Italy, Germany, France and Sea-areas
• In total 28 emission scenarios
• Current phase: 55 additional scenarios (5 groups)
CITYDELTA
8 emission scenarios for each city
• 1999 Base Case• 2010 Current Legislation• NOx, VOC, PM25, PMc
Maximum Feasible reductions
• Current Phase: 7 cities for 4 scenarios (3-4 modelling groups)
• Input data: EMEP emissions, Met year 1999• Area Covered: Europe (resolution 50 km)• Output: Surface fields (hourly, daily and monthly) organised in monthly files and reported on individual model grid. Interpolation to Lat-lon and EMEP
ED: Input / Output
Data Management
The Euro- & City-delta tool
Original Participant data (~Tb)
Pre-processing (JRC)
Processed data (20 Gb) and graphical tool
available on Web
Visualisation of raw monitoring data
• Various statistics: observation availability, mean, max, stddev,…• Only for ground stations up to now.
Comparison of measurements/model results
• Numerous statistics available including Taylor, AOT, SOMO, scatter-plots…• Comparison of different model versions, ENSEMBLE approach• restricted to ground stations
Visualisation of input emission data
• Sector, pollutant, country/region-wise visualisation• No time or species disaggregation.
2-D visualisation
• Selected statistics available for 2-D monthly surface maps• Comparison of different model versions, ENSEMBLE approach but pre-calculated
Mean Ozone
Max ensemble min
Countries
OBSERVATIONSMODEL 1 MODEL 2 MODEL 3, …
4-D Fields: Meteo, Chemistry, Aerosols
Pre-processing (Window Interface)ASCII-BIN CDF
MONIT
Observations Overview
SHOWALL
4D model data analysis
XZ, YZ, SZ, XY Sections
Comparison with obs.
VALID
Statistical Module Multi-models
(obs .vs. models)
EMIS
Emissions QAQCRatio checks
EMISSIONS
Conclusions
- Surface field- Control of ext parameters (biogenics, BC, …) - 2-D functions only for pre-defined variables
+ Common interactive graphical tool + Common input (emission, meteo) as far as possible)
? Data transfert? Data interpolation? Grid structure (e.g. emission release height)
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