0000000000504923
AUTHOR
Jean-pierre Chabin
Concentrations de NO2 développement d'un SIG et influence de la météorologie à Dijon durant l'hiver 1999
ACTI; International audience; A nitrogen dioxide (NO2) measurements campaign, with passive diffusion tubes, realised by ATMOSF'Air during the winter 1999, allows to realise an atmospheric pollution study in the Dijon urban area. In order to understand the spatial NO2 distribution in the urban area, NO2 is correlated with NO emissions and topography thanks to a Geographical Information System (GIS). With a multiple linear regression, NO2 concentrations are explained principally by traffic and topography. A Principal Components Analysis shows the necessity to nuance the relation between these variables. So, the meteorological datas of Dijon-Longvic, could explain the different NO2 distributio…
Une nouvelle approche de la forêt bourguignonne : intérêt et limites de l'utilisation de satellites
National audience
Pollution en ozone en Bourgogne Orientale
International audience; Ozone concentrations in Burgundy, and particularly for the two principal agglomerations, Dijon and Chalon-sur-Saône, are studied on the 1998 and 1999 summers (April-September). A Principal Component Analysis is carried out to examine their relationships with meteorological conditions and nitrogen oxides (NOx). The episodes are associated with summer warm, dry and sunny weather conditions, which are established during several days when Northerly or Easterly winds prevail. The entire region is affected. Night patterns of ozone are more heterogeneous with a higher chemical destruction in Chalon. Outside episodes, night concentrations are for a large part controlled by t…