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 Meteosat Weather Data Tags AVHRR Europe MODIS MSG SEVIRI NOAA Terra/Aqua Date 2011 SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study 21 January 2011 00:00 UTC Pollution causes cloud-free gaps in clouds Elongated cloud-free gaps in stratus clouds caused by industrial air pollution.