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Air quality: the Metropolis continues its actions

Air quality: the Metropolis continues its actions
Air quality: the Metropolis continues its actions

On the occasion of National Air Quality Day this Thursday, October 14, an update on the actions taken by the Metropolis to improve air quality in the territory by aiming to reduce atmospheric pollutant emissions.

Through its Climate Air Energy Policy and its partnership with Atmo Normandie, the Metropolis is committed to contributing to the improvement of the air quality in its territory and aims to reduce atmospheric pollutant emissions. The strategy of the Metropolis is based on three main axes:

– The reduction of background pollution levels by targeting the recommendations, established in 2005, of the World Health Organization (WHO) by 2030,

– The elimination of exposure of populations to exceedances of regulatory thresholds (limit values) by 2024,

– Reduction of atmospheric pollutant emissions, including the three main pollutants identified in the Seine Valley Atmosphere Protection Plan: nitrogen dioxide (NO2) and fine particles (PM10 and PM2.5).

Several actions were implemented in 2021 with a view to guiding public policies and developing participatory science approaches with citizens.

Creation of a network of citizen “noses”

The Metropolis and Atmo Normandie will form a “nose network” made up of volunteer citizens trained in odor recognition. Their mission: to note chronic odors and provide precise information on odors in the event of significant significant events. Thanks to the work of these citizens, it will become possible to characterize the types of odors (“olfactory profiles”) to which the territory is exposed, and thus help to better identify the sources. Volunteers, currently being recruited, will be trained by early 2022.

Experimentation of a micro-sensor assembly workshop

The Rouen Normandy Metropolis is organizing, in partnership with Atmo Normandie, an experiment with micro-sensors measuring the concentrations of fine particles PM10 and PM2.5 as well as the ambient temperature and humidity. The principle is to develop the use of 10 portable sensors produced during an assembly workshop with the contribution of volunteer citizens. The objectives of this experiment are to make the population aware of the related air quality issues, according to their behavior and their exposure, and to develop participatory science on these subjects.

The assembly workshops will take place in the Pasteur annex town hall (11, avenue Pasteur, 76000 Rouen – Micheline-Ostermeyer room) in two successive sessions of a maximum of ten citizens.

Session n°1 :
October 16 from 2 p.m. to 6 p.m. (realization of the workshop)
November 6 from 9 a.m. to 11 a.m. (presentation of the results)

Session n°2 :
November 13 from 2 p.m. to 6 p.m. (realization of the workshop)
November 27 from 2 p.m. to 4 p.m. (presentation of the results)

Following the workshop, each participant will have the opportunity to test a micro-sensor in their daily life for a week, at the end of which it will be returned to Atmo Normandie who will analyze the measurements and present the results on November 6 for the first group, and November 27 for the second.

Workshop registration

Deployment of a network of fixed micro-sensors

A network of fixed micro-sensors installed on traffic lights and public lighting will be gradually deployed over the coming months. Ten sensors will be installed between the end of November and the beginning of December and if the tests are conclusive, twenty additional sensors will be installed in spring 2022. The creation of this complementary network is carried out within the framework of the TIGA Rouen project intelligent mobilities for all. It will strengthen Atmo Normandie’s models on the territory of the Metropolis, via the statistical analysis of the data.

Experimentation with pollen sensors

The Rouen Normandy Metropolis, in partnership with Atmo Normandie, is supporting the company LIFY AIR for an experimentation, over a period of one year, of a solution comprising a network of innovative sensors, the aim of which is to be able to inform populations allergic to pollens of a potential risk in the territory, by providing geolocated and real-time information on the presence of pollen. Ten sensors will be installed by the end of the year to anticipate the next pollen season.

Incub’air: innovative projects on the territory of the Metropolis in favor of air quality

In order to bring out solutions in favor of air quality, including odors, Atmo Normandie has created Incub’air dedicated to the incubation and dissemination of innovative solutions and the development of training for the general public. and professionals. The Metropolis wishes to contribute to the development of Incub’air in order to continue to offer and structure experiments and innovation partnerships in its territory.

Improving local knowledge on air quality

Realization of the air diagnostic card (2020)

A unique mapping of the annual average concentrations of three pollutants (NO2, PM10 and PM2.5) over a period of 5 years (2014 to 2018) was carried out by Atmo Normandie at the end of 2020. A real decision-making tool for politicians public, this map is based on the WHO guideline values ​​of 2005 and the European Union limit values. It illustrates the territorial issues of air quality and exposure of the population to atmospheric pollution.

Air diagnostic map – Rouen Normandy metropolitan area annual average

LOCAL IPCC study on air / climate interactions

The LOCAL IPCC is a committee of local and independent experts on climate change, created in 2018 during the local COP 21, whose mission is to provide an inventory of the local impacts of climate change in order to contribute to the territory’s adaptation policy. Six summaries have already been published in several fields, and in particular on air quality.

The role played by climate on air quality remains complex due to the variability of meteorological factors and actions aimed at reducing emissions of air pollutants and greenhouse gases.

The air quality of the Metropolis has improved over the past ten years, although episodes of pollution occur occasionally. Fine particles (PM10 and PM2.5) and nitrogen dioxide (NO2) still represent an issue for air quality in urban and peri-urban areas, especially near highways. Ozone (O3) in the summer is also an issue.

The increase in global methane emissions will probably impact the quality of the air in Europe, and therefore that of the Rouen region, since methane is a precursor gas for ozone. In addition, higher temperatures and a higher CO2 concentration could promote the production and release of pollens and allergens in the air, as well as the establishment of very allergenic species such as ragweed, already spotted in some municipalities. of the Metropolis. These prospects induce a greater risk of allergy for the inhabitants.

Beyond the risk that is still poorly understood today of the impact of global warming on air quality, with probably a deterioration of the latter, it will be necessary to constantly seek measures to reduce greenhouse gas emissions. greenhouse those that will be the most beneficial for air quality.

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