Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Satellites Atmospheric Composition Sentinel Metop Tags GOME-2 Sentinel-3 IASI Metop-A Metop-B EPS Europe Asia Date 2020 Date January SHOW ALL Sort by Start Date Order Ascending Descending 1 result Case study Jan, Feb, March 2007-2020 EUMETSAT Science Blog Pollution levels drop during COVID-19 lockdown The COVID-19 lockdown in early 2020 had a visible effect on pollution.