Researchers from Valencia’s Polytechnic University have studied the fall in nitrogen dioxide concentrations in recent weeks in different Spanish cities. Of those analysed, Barcelona is where it has decreased the most – 83%. The levels of concentration of nitrogen dioxide, one of the main culprits of air pollution, have decreased on average by 64% in the main Spanish cities after the measures implemented to fight against COVID-19. They have decreased the most in Barcelona (83%). In Madrid they have fallen by 73%, and in Valencia, by 64%. These are some of the results of a study conducted by researchers of Valencia’s Polytechnic University (UPV), belonging to the Centre of Physics Technologies. To do so, the team of the UPV has analysed satellite images from the Sentinel-5P mission of the Copernicus programme of the European Space Agency (ESA), comparing data from two timeframes: from 10 to 14 March on one hand, and from 15 to 20 March on the other. From this data, they generated a series of maps that show the concentrations of nitrogen dioxide in some of the main Spanish cities. As highlighted by Elena Sánchez-García, researcher from the Land and Atmosphere Remote Sensing group (LARS-UPV) belonging to […]


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