FAIRMODE CT9

Benchmarking platform for air quality projections

Kick-off

FAIRMODE Technical Meeting

October 2020

FAIRMODE CTs

Need for assessing planning applications

Assessment Planning

Comparison S-CHIMERE / S-EMEP

POMI exercise (2012)

• Several models applied to Po valley

Lombardy region.

• After several adjustments and several

scenarios simulated normalized

results are similar!

We learn from inter-comparisons

QUESTION:

How to deal with the variability of model responses to emission

changes?

PROPOSAL:

An inter-comparison platform: To address the issue of the sensitivity of

model responses to emission changes, in particular to assess, discuss,

explain and minimize model discrepancies.

CT9 Platform | objective

Platform intended to benchmark

and understand differences

among modelling system

responses to emission changes

• Wide set of cities in Europe (mostly EU capitals)

plus a few regions were defined.

• Main pollutants: PM, NO2 and O3

• Addressing both episodes and yearly averages

• Theoretical scenarios

• Intended both to local & European scale

modelling systems

• Platform rather than an exerciseintention is not to compare cityresponses among themselves but tocompare model results over a given city

CT9 Platform proposal

8

EU-wide simulations

Short-term scenarios in

EU capitals and regions

• Sectorial

• Spatial

• Precursor

• Sensitivity analysis

Long-term scenarios in

few EU cities

• Sectorial

• Spatial

City and/or regional scenario modelling

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CT9 Platform proposal

CT9 Platform proposal | steps

1. Generate EU-wide results with episode scenarios

In progress

2. Generate EU-wide results with long term scenarios

Done

3. Upload local results (region/city) for comparison

In progress

4. Build an visualization interface

Done

5. Assessment and understanding of differences

Waiting for additional results

6. Build processes to allow downloading specific city data

(BC, emissions, meteorology) for sensitivity analysis.

To do

CT9 Platform proposal | steps

This inter-comparison platform would allow:

- understanding the variability of

models responses to emissions changes

- guide member states/cities in the

application of emission reduction

measures:

• Model system vs model system

(same/different scale)

• Model vs model

(with similar input data)

• Model version vs. model version

Results example and comparison indicators

𝑃𝑐𝑖𝑡𝑦𝑐𝑒𝑛𝑡𝑒𝑟𝑝𝑜𝑖𝑛𝑡

𝛼 =∆𝐶𝑐𝑖𝑡𝑦

𝑐𝑒𝑛𝑡𝑒𝑟𝑝𝑜𝑖𝑛𝑡𝛼

𝛼

𝐶𝑖𝑡𝑦 = 𝐹𝑈𝐴 %reduction

Similar results mean

a linear response

Results example and comparison indicators

𝑃𝑐𝑖𝑡𝑦𝑐𝑒𝑛𝑡𝑒𝑟𝑝𝑜𝑖𝑛𝑡

𝛼 =∆𝐶𝑐𝑖𝑡𝑦

𝑐𝑒𝑛𝑡𝑒𝑟𝑝𝑜𝑖𝑛𝑡𝛼

𝛼

CT9 platform tool

CT9 Platform proposal | NOTES

• Important to have model developers on board (local and European scales)

• The JRC has run EU-wide simulations with EMEP and will possibly do with WRF-CHEM to

populate the platform but other EU-wide with similar/other models/versions are welcome.

• Very important to get local scale modelling groups simulating their cities.

• (suggestions from some groups): inter-comparison up to the street level later stage

CT9 participants/volunteers

Cristina Guerreiro, NILULeonor Tarrasson, NILUDaniel Brookes, Ricardo UKA. Megaritis, Patras, GRStijn Janssen, VITO Angela Morabito, Sardenia, ITFernando Martin, CIEMATMark Theobald, CIEMAT, SPA Adamopoulos, YPEKA, GR E Deangelis, UNIBS, iTRahela Zabkar, SLOVENIAAles Padro, TECNALIA Stephan Nordmann, UBA, DE Rafael Borge, UPM, SP Eva Gabucio, GENCAT

Shyn Tong, DEFRA, UK Laurence Rouil, INERISAugustin Colette, INERIS Ilaria delia, ENEA, IT Mihaela Mircea, ENEA, IT Antonio Piersanti, ENEA, IT Luisella Ciancarella, ENEA, IT Martijn Schaap, TNO J. Matejovicova, SHMU, SLEmilia Georgieva, BULGARIAGuido Pirovano, SER, IT Horvathz, SXE, HU Eivind Wærsted, NORWAYJonilda Kushta, CY Les White, Aeris Europe

Interested people: potential volunteers?• Pawel Durka & Joanna Str., PL

• M. Stortini & Giovanni, ARPAE, IT

• Claudia Flandorfer & Kathrin, ZAMG, AT

• Christian Nagl, Umweltbundesamt, AT

• Nina Benesova, CHMI, CZ

• Ulas Im, ENVS, DK

• Maria Luisa Volta, UNIBS, IT

• Sonia Vidic, DHZ, HR

• Ranjeet Sokhi, UK

• Alexandra Monteiro, PT

• Alexander de Meij, Kees Cuvalier, JRC

Plans: next steps

Online meeting dedicated to CT9 work

DATE:

Middle of November?

WORKPLAN:

Explore the JRC results for Europe

Presentation and sharing the first local participants results

Discussion & brainstorming to next steps