Fanny VELAY-LASRY

1. ARIA Technologies SA
8-10, rue de la Ferme – 92100 Boulogne Billancourt – France
Telephone: +33 (0)1 46 08 68 60 – Fax: +33 (0)1 41 41 93 17
E-mail: info@aria.fr – http://www.aria.fr
ARIA Technologies
The Arve Valley project
Modeling the air quality in a narrow valley
Fanny VELAY-LASRY fvelay@aria.fr
Team manager Regional air quality and climate

2. Company Profile
ARIA Technologies SA
• Founded in 1990 by researchers from EDF R&D
One single focus: the atmospheric environment
• Software and systems
• Study and consults R&D collaboration with large universities
(CNRS-IPSL) and research center (US-NCAR)
SME
Headquarter in Boulogne-Billancourt
• Offices in Grenoble, Toulouse, Brest, Mexico
• Subsidiary company in Milan (Italy) since 2000: ARIANET
• Subsidiary company in Turin (Italy) since 2010: SIMULARIA
• Subsidiary company in Rio (Brazil) since 2010 : ARIA do
Brazil
ARIA Technologies 2

3. Our domains of activity
3
Industries Sustainable cities Risks
Climate Renewables

4. 4
 Air quality forecast system
 Arve Valley Project in
collaboration with ARIANET
 Prospective studies for air quality
improvement
• Trafic studies « Air and health »
• Neighborhood development
• Pedestrian comfort studies
Sustainable cities

5. Regional air quality
ARIA Technologies 5
Turin
Italy
Paris
Rio de Janeiro I
Israel
Bari/Katowice
Qatar
Kaliningrad
Beijing
Rome
Antananarivo
Casablanca
Romania
Delhi
Rio de Janeiro II
Tunisia
Indonesia
ARIA Regional Air Quality Management
tools are now operational in many cities

6. MITIGATION
• Monitoring Reporting Verification
ADAPTATION
• Climate Change Impact – Downscaling methods
• Risk Assessment
• Business Operational Tools
6ARIA Technologies
Climat
ARIA Technologies is involved in Climate Change projects
since 2009
Developping decision support operational information and tools

7. Atmospheric
Chemistry
Transport
Model
CHIMERE
Comparison of simulated
CO2 concentration with in
situ measurements
Prior CO2 emission CO2 concentration fields
Time evolution of simulated and observed
CO2 concentration at Gif/Yvette
Inverse
Modeling
Technique
In situ
observations
network around
Paris
Posterior CO2 emission Probabilistic tools to compute
the best CO2 emission estimate
that reduces the
observations/simulation
discrepancy
MITIGATION
• Monitoring Reporting Verification
Climate

8. Paris
Very precise bottom-up inventory
initially available
3 years of CO2 measurements
over 7 stations running
Rotterdam
Precise bottom-up inventory
initially available
1 years of CO2 measurements
over 3 stations running
Recife
Global and unprecise bottom-up
inventory initially available
5 months of CO2 measurements
over 2 stations running

9. 9
Climate
ADAPTATION
• Future water resource in the Israel/Palestine/Jordan region

10. Climate
An « open-source » platform to compute the risk for
insurances dues to storms, fire forest, floods…
Insurance for forest fires : brasilian forest plantation
• Model of forest fire biomass hazard: collaboration with the IUSTI lab
for fire propagation models
• Damage risk evaluation: collaboration with ForestRe (R&D – forest
insurance)
Eucalyptus
dunii
Pinus taeda
Veg Nat
APP
10

11. 11
 Air quality forecast systems
 Arve Valley Project
 Development of an air quality
forecast system over the Arve
Valley for the industrial group
BONTAZ CENTRE
Sustainable cities

12. Context
• Particles pollution peaks in winter and especially this last
december (traffic, wood heating sources)
Objectives
• Bring information to the population in the Arve Valley in
complement to the information published by the air quality
network ATMO AURA…
• Improve the knowledge (meteorological process, wood heating
emissions)
3 complementary partners
• The Bontaz group
• ATMO AURA
• ARIA
The Arve Valley project
12ARIA Technologies

13. Our expertise…
Similar system developped by ARIANET in Aosta Valley
• Performance tests for the Kalman Filter implementation for year 2016
(ARIANET) over Aosta Valley

14. The Arve modeling chain
FARM Configuration : 2 nesting levels
Domains :
• Father Domain (“Grand Domaine”) : 1 km horizontal resolution (53 x 36 cells)
• Son Domain (“Domaine d’intérêt”) : 100 m horizontal resolution (201 x 151 cells)
• 16 vertical levels from between 20 and 10 000 m
Gas and aerosol processes
• Full chemistry for Father domain
• Reduced one for Son domain
Anthropogenic emission provided by ATMO AURA
Boundary conditions: Provided by CHIMERE 3km operated by ATMO AURA
Meteorology: Provided by WRF operated by ATMO AURA
Statistical correction : Kalman filter + Spatial interpolation (landuse )
FARM
FARM

15. First results…
December 2016 episode
• PM10 for the 06/12/2016
CHIMERE 3 km
ATMO AURA
FARM 1km
ARIA
ATMO AURA
Published
forecast
FARM 1km
Corrected with
ATMO AURA +
BONTAZ
measures

16. First results…
[PM10] Daily mean
Marnaz Sallanches
Passy

17. To go further…
17ARIA Technologies
Improvements and tests to be carried out
• Adjustment of the dynamical modelling (representativeness of the
stability of air masses in the valley)
• Adjustment of wood heating emissions data . High source of uncertainty
in term of total mass emitted as well as temporal variation of the
heating activity
Objectives : improve the modeling results before the application of the
statistical correction
and understand the main processes at the origin of an air pollution episode