Case studies Imagery and case studies of weather phenomena and environmental events observed by EUMETSAT's fleet of weather satellites. Sort Refine results Categories Sentinel Atmospheric composition Ocean Data Metop Tags Sentinel-3 Europe Asia GOME-2 OLCI IASI Metop-A Metop-B Metop Polar Date 2020 2017 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 2 March 2017, 28 April, 7 May, 16 July, 30 July, 11 August and 21 August 2018 Phytoplankton blooms spotted by Sentinel-3 Images of the variety of species of phytoplankton that bloom in the world’s oceans and lakes in 2017 & 2018.