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Article A matter of chemistry
The chemistry of our atmosphere is complex. The atmosphere contains layers with different densities and different chemical compositions. We asked Professor David Fowler from the Centre for Ecology & Hydrology of the Natural Environment Research Council in the United Kingdom, about the air pollutants and chemical processes in our atmosphere that impact our health and the environment.
Located in Signals — Living in a changing climate Signals 2013 Interviews
Daviz Visualization Attainment situation for NO2
Located in Data and maps Data visualisations
Figure PM2.5 - Annual target value for the protection of human health
In the air quality directive (2008/EC/50), the EU has set a target value for fine particulate matter (PM2.5) for the protection of human health: the PM2.5 annual mean value may not exceed 25 micrograms per cubic metre (µg/m3).
Located in Data and maps Maps and graphs
Figure Sulphur dioxide - Hourly limit value for the protection of human health
In the air quality directive (2008/EC/50) the EU has set two limit values for sulphur dioxide (SO2) for the protection of human health: the SO2 hourly mean value may not exceed 350 micrograms per cubic metre (µg/m3) more than 24 times in a year and the SO2 daily mean value may not exceed 125 micrograms per cubic metre (µg/m3) more than 3 times in a year.
Located in Data and maps Maps and graphs
Daviz Visualization Change in emissions of non-methane volatile organic compounds compared with the 2010 NECD and 2010/2020 Gothenburg protocol targets
Located in Data and maps Data visualisations
Figure Percentage of urban population resident in areas for days per year with PM10 concentration exceeding daily limit value, 2001-2010 (EU-27)
The limit value is 50 µg PM10/m3 (24 hour average, i.e. daily), not to be exceeded more than 35 times a calendar year and to be met by 2005. Over the years 2001-2010 the total population for which exposure estimates are made, increased from 68 to 107 million people due to an increasing number of monitoring stations reporting air quality data under the Exchange of Information Decision. Year-to-year variations in exposure classes are partly caused by the changes in spatial coverage. Only urban and sub-urban background monitoring stations have been included in the calculations. Data for Greece and Malta are not included due to missing availability of operational urban and sub-urban background monitoring stations in the Urban Audit cities.
Located in Data and maps Maps and graphs
Daviz Visualization Annual variation in the ozone AOT40 value for crops (May-July)
Located in Data and maps Data visualisations
Daviz Visualization Percentile 90.4 of the daily PM10 concentrations observed at (sub)urban background stations
Located in Data and maps Data visualisations
Figure Attainment situation for CO, reference years 2010, 2005, 2001
The graphs are based on the 8-hourly mean concentration values; they present the range of concentrations at all station types (in mg/m3) officially reported by the EU Member States and how the concentrations relate to the limit value set by EU legislation (marked by the red line). The diagram indicates the lowest and highest observations, the means and the lower and upper quartiles. The lower quartile splits the lowest 25 % of the data and the upper quartile splits the highest 25 % of the data.
Located in Data and maps Maps and graphs
Figure Exceedance of critital loads of acidity
Maps showing changes in the extent to which European ecosystems are exposed to acid deposition (i.e. where the critical load limits for acidification are exceeded). Values for 2010 are predicted based on adherence to implementation of NEC Directive.
Located in Data and maps Maps and graphs
European Environment Agency (EEA)
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