Estimation of the areas of air quality limit value exceedances on national and local scales. A geostatistical approach

Laure Malherbe (1) , Maxime Beauchamp (1) , Laurent Letinois (1) , Anthony Ung (1) , Chantal de Fouquet (2)

1 INERIS - Institut National de l'Environnement Industriel et des Risques
2 GEOSCIENCES - Centre de Géosciences

Each year Member States have to report to the European Commission on the exceedances of air quality limit values which occurred on their territory. Quantitative information is required about the areas and population exposed to such exceedances. A probabilistic methodology for defining exceedance zones has been developed, based on preliminary air quality mapping. Atmospheric concentration fields estimated by kriging and the corresponding kriging variance are used to identify areas where the exceedance or non-exceedance can be considered as certain and areas where the situation with respect to the limit value is indeterminate. The methodology is applied on national and urban scales focusing on exceedances of PM10 daily limit value and NO2 annual limit value. Results are discussed from operational perspectives.

Keywords: THRESHOLD EXCEEDANCE; GEOSTATISTICS; KRIGING; NO2; PM10

Domains: Environmental Sciences

Laure Malherbe, Maxime Beauchamp, Laurent Letinois, Anthony Ung, Chantal de Fouquet. Estimation of the areas of air quality limit value exceedances on national and local scales. A geostatistical approach. European Regional TIES Conference "Spatial Data Methods for Environmental and Ecological Processes -2. Edition", Sep 2011, Foggia, Italy. pp.NC. ⟨ineris-00973623⟩