Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Atmospheric composition Weather Metop Data Meteosat Tags GOME-2 MSG SEVIRI IASI Metop-A Metop-B Europe Date 2014 Date April SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study 1 April 02:56 UTC–2 April 2014 02:58 High air pollution in parts of Western Europe On 1 April GOME-2 instruments on Metop-A and -B observed elevated levels of NO2 total column concentration over parts of Europe.