1 The Italian National Topic Centre on Atmosphere Climate and Emissions in air Modelling techniques for air quality evaluation and managing: the work of the National Topic Center. Marco Deserti (1); Francesco Lollobrigida (2); Elisabetta Angelino (3); Giovanni Bonafè (1), Enrico Minguzzi (1), Michele Stortini (1) ; Cinzia Cascone (2), Roberta De Maria (2), Monica Clemente (2) Stefano Mossetti (3), Silvana Angius (3) (1) Regional Environmental Protection Agency (ARPA) Emilia Romagna,Bologna, Italia (2) Regional Environmental Protection Agency (ARPAP) Piemonte,Torino, Italia (3) Regional Environmental Protection Agency (ARPAL) Lombardia, Milano, Italia 9 th Harmo Garmisch, June
2 The CTN-ACE: The Italian National Topic Centre on Atmosphere Climate and Emissions in air (CTN-ACE) was founded in 1999 by the Italian National Environmental Protection Agency (APAT, formerly ANPA). CTN-ACE is a network between the Italian Regional Environmental Agencies (ARPA) and several national research institutions. CTN-ACE, since its foundation, has been working to produce and review guidelines for several topics related to air quality. One of these topics is air quality modelling.
3 Law and technical references: Modelling is one of the main tools to evaluate air quality and to prepare plans and programmes, as requested by the framework EU Directive on air quality evaluation and management (96/62/CE) and related daughter directives. Therefore the main task of the CTN-ACE WG on air quality modelling is to prepare the national guidelines for models application. the Italian law (D.Lvo. 4 agosto 1999 n. 351, DM 2 aprile 2002 n. 60 and DM 1 ottobre 2002 n. 261) included the early guidelines prepared by the CTN-ACE as technical annex.
4 Why environmental agencies and local authorities apply models? 1. Preliminary assessment of ambient AQ, where no measurements are available, to design monitoring networks; 2. Annual A.Q. assessment throughout the territory (AQ analysis combining modelling and monitoring); 3. A.Q. daily forecast and analysis to inform population and take short term abatement measures; 4. Scenario analysis for AQ management (i.e. evaluate the effectiveness of practical measures, prepare plane and programs); 5. Environmental impact assessment (example: take decision about new plants authorisation)
5 The status report on modelling in Italy: A review on model applications in Italy, performed by the Italian WG during , put into evidence that modelling techniques were scarcely applied in the daily working routine by environmental agencies and local authorities; Modelling received poor funding and was scarcely supported; It was often difficult to prepare the input data, especially for the photochemical models; there is a gap between the needs and the true availability of models for practical purposes.
6 Conference The first stage of the work: Support the models users to: choose Harmonisation the models to apply prepare the input data correctly run the model Evaluate the results The reports: RTI CTN_ACE 4/2001, RTI CTN_ACE 5/2001 The WEB9 th Taratura del modello modifica dei parametri interni miglioramento dell input NO Definizione del problema: inquinanti da valutare indicatori da valutare scala spazio - temporale Raccolta dei dati: qualità dell aria meteorologia emissioni dati geografici Selezione del modello: definizione dei requisiti ricerca del codice adatto valutazione risorse disponibili installazione del modello connessione con i dati Applicazione del modello definizione input - parametri interni - output definizione griglia e passo temporale esecuzione test e prove calcolo degli indicatori Verifica dei risultati: assimilazione confronto con dati calcolo indicatori di qualità I risultati sono soddisfacenti? SI Utilizzo dei risultati: mappatura individuazione aree critiche
7 The website of the National Environmental Information System (SINA) and the hyper textual guide to air quality modelling: CONTENTS: basic concepts, a list of air quality models and links; guide to meteorological input data (abstracts and links to the COST710 and 715); guide to emission input data; download the technical reports didactic documents.
8 Models application typology and scales: (1) urban areas (2) industrial sources (3 ) large scale models
9 A list of air quality models, selected on the basis of main Italian experiences (example: list of large scale models) name type reference CALGRID Euleriano 3D Atmospheric Studies Group Earth Tech., Concord MA 01742, USA (formerly Sigma Research Corporation) Open source YES/NO CAMx Euleriano 3D ENVIRON Yes CHIMERE Euleriano 3D Institut Pierre-Simon Laplace CNRS FRANCE Yes STEM Euleriano 3D Centre for Global & Regional Environmental Research (CGRER) No FARM Euleriano 3D Arianet srl No For each model the guide provides some basic information, a link to the international databases (such as MDS and EPA-SCRAM) and/or to the web site containing more detailed information, and a description of the model availability (open source or commercial). Some examples describing the models application in Italy are included. Yes
10 Needs for the new guidelines on modelling: Guidelines on models applications should be better detailed to provide all the information on modelling techniques required by the EC directives: The reference techniques and the spatial resolution for modelling should be indicated (as requested by the 96/62/CE framework directive); the uncertainty of models should be evaluated (DM 2 aprile 2002 n. 60 daughter directive 1999/30/CE annex VIII, ozone Directive 2002/3/CE annex VII). the models should be evaluated on long term runs (season/year time periods).
11 Pollutant SO 2, NO, NO 2 Av. time 1 h 1 d 1 y Data-quality objectives for Modelling (*) % 50 % 30 % Data-quality objectives Data-quality objectives for continuous measurement Italian law EC Directive (*) the accuracy for modelling is defined as the maximum deviation of the measured and calculated concentration levels, over the period considered by the limit value, without taking into account the timing of events. 15 % PM, lead 1 y 50 % 25 % CO 8 h 50 % 15 % Benzene 1 y 50 % 25 % O 3, NO, NO 2 1 h day 8 h max 50 % 50 % DM 2 aprile 2002, N % To be received 1999/30/EC 2000/69/EC 2002/3/EC
12 An industrial stack with complex orography Wind and turbulence field The pollution at the Environmental impact assessment at the local scale, single stack or arrays of sources. surface
13 Emissions from many linear street sources Pollution map Air quality assessment and management in the urban areas and industrial agglomerates, generic passive pollutants, a large number of sources. The street canyon
14 Large scale CTMs CTMs: air quality assessment and management in zones and agglomerates throughout the territory, chemically reactive pollutants (ozone and PM10). Map of ozone exceedences
15 Some practical features of the urban models Atmospheric processes: diffusion and transport, dry deposition (simplified chemistry), at least emission sources; pollutants: generic passive (CO, NO2, Benzene, PM10); Application area: small/medium urban areas or part of an agglomerate; Typical domain: around 10x10 km 2; Simulation periods: 1 year/6months winter season; Data-quality objectives: annex X DM 2 aprile 2002 n. 60 for sulphur dioxide, nitrogen dioxide, particulate matter and lead, benzene and carbon monoxide. Models under evaluation by CTN-ACE WG: Large number of sources: ADMS-URBAN, IMPACT, Can be adapted for urban areas: CALPUFF, SPRAY, Only road links : CALINE-4, Only street canyon: CFX-TASCflow, MERCURE (now Aria Locale), OSPM, PROKAS-B, WINMISKAM Input data format: Line sources (road links), point sources (stacks), area sources, Simple meteorology: data from one met. station + 1d pre-processor, Initial and boundary conditions: background concentration from monitoring stations or large scale models.
16 some practical features of large scale models: Atmospheric processes: diffusion and transport, dry deposition, chemistry and particulate matter, dry/wet deposition, pollutants: ozone, nitrous dioxide, PM Application area: large urban agglomerates; throughout the country. Typical application domain: 300 x 300 Km 2 or larger, nested approach; Simulation periods: : 1 year/6 months summer Data-quality objectives: annex VII 2002/3/EC for ozone. Models under evaluation by CTN-ACE WG: Including PM10 modules: CAMx, CHIMERE, FARM Not including PM10: CALGRID, STEM Input data format: hourly emissions on a regular grid at the same model resolution, all type of sources, all chemical species requested by the chemical mechanism. Meteorological fields from a 3D pre-processor or from a NWP meteorological model, Initial and boundary conditions: 3D concentration fields from a CTM.
17 Evaluating the uncertainty of models The main method to quantify the uncertainty of modelling techniques is to realize a model inter comparison exercise. In an inter comparison exercises, to insure the results comparability, all the models should be applied in the same conditions and evaluated on the same criteria. method: prepare a common data set containing the input data needed to run the models and evaluate the results. the data set is distributed to the largest possible group of modellers and left open for a certain time, in order to increase the number of application that can be used to evaluate the range of results. Because the results of a model application can differ depending from the set up and control parameters chosen, it is recommended that the same model is applied by different users. Several exercises realized (example EUROTRAC, CityDelta..), but not focused on defining ; reference techniques and verify data-quality objectives
18 The urban exercise: Aim: verify if the listed models can comply with the EC quality objectives for modelling; Domain: 12 x 12 Km 2, mainly flat land; Middle sized urban area of inhabitants; Reference period: 1 year (1999 January December); Pollutants: CO, NO x -NO 2 Input data: emissions and meteorology; Verification data: concentrations 1 at a monitoring station; ; km Orzinuovi Milano Broletto Ziziola Folzano Triumplina Turati Bettole
19 Centro Tematico Nazionale Emissions input data: COPERTIII-CORINAIR methodology Centro storico Urbane 1 Urbane 2 Provinciali, statali Autostrade Line sources: road network extension 650 km, 948 road links; point sources: 6 NOx and 2 CO; CO and NOx hourly emissions are provided for each source. The road network
20 Meteorological and physiographic Input data: CALMET-SMR: (300 x 300 km2), ECMWF+ Synop, local surface met. stations and upper air data. Physiographic data estimated from "Corine (land use, roughness, albedo, Soil heat flux constant, bowen ratio, leaf area index, terrain elevation). Meteorological data units Temperature K Wind Direction Gradi * Wind Module Vertical Wind Velocity m/s m/s Stability class 1-6 ** U* m/s Mixing Height Monin-Ob-length m m W* m/s
21 Verification data set: NOx, NO, NO2, CO 1 h average data from an urban background monitoring station located in the core of the domain. Annual mean, 50 th and 98 th percentile provided for comparison. Background concentration is also provided. µg/m Pollutant gen feb Annual average (µg/m3) mar apr mag 50 th percentile (µg/m3) giu lug NOX ago 98 th percentile (µg/m3) set CO ott Background conc. (µg/m3) CO NO NO nov dic 2,0 1,5 1,0 0,5 0,0 mg/m3
22 models evaluation: the computed CO and NO x yearly average (expressed as NO 2 ) at the monitoring station location, compared with the measured concentration; the coordinates of the maximum CO and NOx calculated concentration; the matrix of the calculated yearly average concentrations values for the model domain. Some preliminary results: The data set was tested on two urban models used for routine applications among the Env. Agencies participating to CTN-ACE, Both models underestimate the measured NO X concentration (expressed as NO 2 ); Both models satisfy the Data-Quality Objectives set by the EU directive. Model NOx C.Y.A (µg/m 3 ) NOx M.Y.A (µg/m 3 ) Diff % D.Q.O. 1999/30/EC % ADMS Urban ARIA Impact
23 Conc. maps: there is a strong dependence from the grid resolution! ADMS Urban, variable grid, CO ARIA Impact, Regular grid 100 m hor.. res., CO
24 Centro Tematico Nazionale ARIA Impact, Regular grid 100 m hor. res., CO th 9 H n o m r a G a is m r a n o ti n o C e r fe e c n ARIA Impact, Regular grid 1 Km hor. res., CO n e t r a P h c is c r ki n e h
25 Next work: Test different urban models/different users of the same model; The data set has been sent to several modellers and users in Italy that accepted to participate to the exercise; The exercise is still open: modellers/users which are interested to participate, please send an . You will receive the instructions and the data set. You will be asked to provide your results to the CTN-ACE workgroup, according to a common protocol. CTN-ACE workgroup will review all the results and prepare the guideline report. Test CTMs models: an exercise will be prepared.
26 A further data set to evaluate the large scale Chemical Transport Models (CTMs) will be prepared during 2004; two Italian domains: BPA and MED The data set will include: Gridded emission data, 10 km horizontal resolution; Meteorological data from the LAMI met. model; BPA EST NORD Boundary conditions; O 3, NO 2, Pm 10 verification data from selected monitoring stations EST NORD EST NORD EST NORD Corine land cover data available
27 AKNOWLEDGEMENTS: The research institutions which participate to the activities of the CTN-ACE on modelling where the ENEA, CNR-IA, Università degli Studi di Brescia, ENEL and the environmental regional agencies (ARPA) of the Emilia Romagna, Lombardia, Piemonte, Basilicata, Toscana, Veneto regions. We wish to acknowledge all the colleagues who participate to the working group, with special regards to Mario Cirillo, Patrizia Bonanni, Franco Desiato, Gabriele Zanini, Giuseppe Brusasca and Giovanna Finzi for their contribution in preparing the reports and the useful discussion.
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