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Sunday, 11 May 2008 |
Stable between 2000 and 2002, air quality has deteriorated significantly in 2003 with a 5% increase concentrations of pollutants, then improved in 2004 and 2005, with a lower level of pollution by 10% in the years 2000-2002. This general trend is the result of a downward trend in primary emissions
Ozone is likely to be decisive in the future development of air quality in France
and the effects of weather, explains the french Institute of the Environment in a statement.
The analysis conducted by the IFEN confirms an index of ozone and PM10 very high in August 2003, corresponding to the episode of heat wave. The ozone index rose 180 for a 100 level corresponding to the average for the year 2000 while for PM10, it amounted to 130. However, the 2003 heat wave does not explain alone the poor performance of the year. If the month of August 2003 was the same level of pollution that other month since August 2000, 2003 results would have been the worst period for ozone and for particulate matter, wishes to emphasize the IFEN.
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Last Updated ( Thursday, 03 July 2008 )
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Sunday, 27 April 2008 |
Definitions
This indicator aims to monitor trends in the medium and long-term background pollution in urban and peri-urban areas. It is calculated from the monthly average hourly concentrations of pollutants 5 reported on measuring stations in operation in major cities. It is defined as the arithmetic mean of the monthly averages calculated on each city.The pollutants are sulphur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), ozone (O3), fine particulates less than 10 microns in diameter (PM10).
Carbon monoxide (CO)
Concentrations peak, located in winter, are also down for 6 years.
The suspended particulates (PM10) The concentrations in air particles with a diameter less than 10 micrometers (PM10) tend to decrease in urban areas Burgundy over the last five years, for which there is a significant number of analyzers.Fine particles are relatively constant over the years, except in the winter months where values are higher. From time to time, the network can record episodes of particulate pollution resulting from weather on a large scale.It is noteworthy that knowledge of the composition of the particles is just as important as the extent of their concentration in the atmosphere.
The nitrogen dioxide (NO2)
Concentrations of nitrogen dioxide recorded on the Burgundian towns tend to stabilize since 1996. At the national level, concentrations of nitrogen dioxide have declined slightly over the last seven years in most cities. Nitrogen dioxide is mainly emitted by motor vehicles. Technological developments (including vehicles catalyzed) tend to significantly reduce emissions unit vehicles, as the renewal of the park. But this development is offset by other factors: the overall increase in traffic, the number of short journeys made cold cities, namely the use of air conditioning, which leads to over-consumption of the vehicle and an increase in emissions pollutants, including nitrogen oxides. The increase in the proportion of diesel vehicles, which emit more nitrogen oxides than gasoline vehicles, was also accompanied by an increase in emissions of the pollutant.
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Last Updated ( Thursday, 03 July 2008 )
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Sunday, 27 April 2008 |
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Monitoring air quality
The National Network of air pollution monitoring (NAPS) monitors and evaluates the quality of ambient air in cities and municipalities in Canada. It was established in 1969 as a joint initiative of federal, provincial and municipal governments. The coordination of operations is provided by the Division of analysis and air quality Environment Canada. Most stations NAPS monitor the five common air pollutants, which are sulphur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), ground-level ozone (O3) and particulate airborne. The readings of sulphur dioxide, nitrogen dioxide and ground-level ozone are averages for an hour and are taken every hour during the year. Those of carbon monoxide are the averages of the moving average over an interval of eight hours and are also taken every hour during the year. Readings on suspended particulates are the results of sampling periods of 24 hours made all six days at each station. The NAPS monitors contaminants currents to 173 stations across Canada.
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Last Updated ( Thursday, 03 July 2008 )
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Wednesday, 23 April 2008 |
Un spike in Strasbourg, another in Lyon, then in Paris ... The alerts pollution particles have been frequent in recent weeks. The results of air quality in Ile-de-France in 2007, published Tuesday, February 12 by the association Airparif, confirms the importance of this pollution caused mainly by road transport, industrial combustion, home heating and the incineration of waste.
 Their impact on life expectancy has to be quantified in 26 European cities. "If the annual average of fine particulates was reduced to 15 mg/m3, it would be between one month and two years of life expectancy on average, according to the city," said Sylvia Medina, an epidemiologist at the Institute of Health, co-author this work. Many scientists consider too high value guide adopted by the Union, which sets a target of 25 mg/m3 to be met by 2015 for fine particles. France, it has set itself a target of 15 mg/m3 in 2010, which will become mandatory in 2015.
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Last Updated ( Thursday, 03 July 2008 )
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Urban Air Quality 
