Concentrations of sulphur dioxide in polluted areas in India have decreased by around 40% between April 2019 and April 2020. Using data from the Copernicus Sentinel-5P satellite, from the European Union Copernicus programme, scientists have produced new maps which show the drop in concentrations across the country in times of COVID-19. (source: www.esa.int).
While carbon dioxide is more abundant in the atmosphere and therefore more commonly associated with global warming, methane is around 30 times more potent as a heat-trapping gas. Given its importance, Canadian company GHGSat have worked in collaboration with the Sentinel-5P team at SRON Netherlands Institute for Space Research to investigate hotspots of methane emissions during COVID-19. (source: www.esa.int).
Now that COVID-19 mitigation measures are being relaxed in many countries the NO2 concentration is also increasing. Over China, the relaxation of COVID-19 measures brought the NO2 concentrations back to normal levels, as shown in the figure below (source: eo4society.esa.int).
Copernicus Sentinel-5P satellite data are showing strong reductions in nitrogen dioxide concentrations over several major cities across Europe – including Paris, Madrid and Rome (source: www.esa.int).
Lockdowns imposed to halt the spread of the coronavirus have been recently linked with cleaner air quality over Europe and China. New images, from the Copernicus Sentinel-5P satellite, from the European Union Copernicus programme, now show some cities across India seeing levels drop by around 40–50% owing to its nationwide quarantine (source: www.esa.int).
Recent data have shown a decline of air pollution over northern Italy coinciding with its nationwide lockdown to prevent the spread of the coronavirus (COVID-19). This new map shows the variation of nitrogen dioxide concentrations over China from December to March – thanks to the Tropomi instrument on board the Copernicus Sentinel-5P satellite (source: www.esa.int).
CAMS is continually monitoring air quality in Europe and around the world using satellite and ground-based observations and advanced numerical models. In the context of the worldwide COVID-19 crisis, there is increased interest in changing air quality. (source: atmosphere.copernicus.eu).