The search of fine particles of Paris-Ball

Celine Serrat | AFP -

Type the west of the capital, Paris ball does not that tourists: it is a permanent device as unobtrusive an innovative, allowing the study of microscopic dust, a major source of pollution in the air.

"There's still fine in good working less than 10 microns (PM10) and 2.5 microns (PM2, 5), but were (are), is on the micrometer, n 'not," said Jean-Baptiste AFP Renard, CNRS/LPC2E investigator and director of the facility, the plane after the spring of 2013.

However, these ultrafine particles are also numerous, and from 10,000 to 100,000 and 100 to 1000 liters of air pollution during peak periods. Therefore, it should know better. Allowing a small white box attached to helium balloon basket and the Parc André Citroën (XV) connected cable.

By the laser beam "optics counter aerosol Light" (ILAC) and characterization of the microparticles (carbon, carbon compounds, minerals).

"The goal is to determine the vertical distribution of their movement," said specialist aerosols. "We are far ahead of regulation," he says.

In addition, the performance of the DCA, the device is determined by the continuity of research and the ability to perform in the range of 0 to 150 meters above the ground, adds Jean-Baptiste Renard.

Since 2008, the world of Paris, which is around 60,000 passengers per year, has been a "means for indicating the air quality in real time," the head of the company Aérophile Jerome Giacomoni says through a partnership with the city of Paris and Airparif.

- On the way to the pedestrianized areas -

With sixteen sensors scattered Airparif capital concentration of PM10, ozone, nitrogen dioxide and sulfur dioxide pollution detected and used to calculate two indices: one in the vicinity of the motion even at a distance.

"These two numbers are in Paris Ball, cars and monuments has to be found to the color (green, yellow, orange, red) according to the air quality change," says Ball operator in Paris.

The fouling index is rarely near the green, except in the night. This situation reflects the deterioration of air quality in the city and along the main roads in the region. In 2013, more than 3 million Parisians were to levels of PM10, PM2, 5, and nitrogen dioxide, the subject of the regulation indicators Airparif.

Ozone levels to be too high, but not to meet the standards demand.

The particles that act the respiratory and cardiovascular system, initially most of the procedures and warnings in Ile-de-France, 2013 (33, 36 days), caused when the average hourly concentrations exceed certain thresholds.

This Microdust fuel oil and wood, transport, industry and agriculture, according to a distribution that varies by location (urban, peri-urban, rural). Urban areas, the major source of emissions.

Anticyclonic conditions of the strong pollution episode Favored touches particles in mid-March and has led to the establish a good portion of the reciprocating motion of the Ile-de-France French government.

Be proactive, the bill provides an opportunity to create an energy shift to areas with limited circulation, is eco-car, first the old diesel and premiums for the purchase of vehicles with clean will also increase under certain conditions.