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 Data Meteosat Metop Sentinel Tags Metop-B Metop Asia ASCAT GOME-2 MSG SEVIRI Sentinel-3 IASI Metop-A Europe Terra/Aqua MODIS Date 2020 2019 SHOW ALL Sort by Start Date Order Ascending Descending 2 results Case study Jan, Feb, March 2007-2020 Pollution levels drop during COVID-19 lockdown The COVID-19 lockdown in early 2020 had a visible effect on pollution. Case study 24 September, 24 October 2019–8 November Active Indian Ocean tropical cyclone season 2019 saw a lot of cyclonic activity in the northern Indian Ocean, with five systems.