mardi, 24 mars 2020 à 16:00 - La pandémie de la COVID-19 est un drame pour de très nombreuses communautés. À l'heure d'écrire ces lignes, dans le monde, 1 milliard de personnes sont soumises à des mesures restrictives décrétées par leurs gouvernements afin d'endiguer la propagation de ce nouveau coronavirus. Au même moment, une baisse significative de la pollution est visible.
La COVID-19 continue de provoquer la mise en place de mesures drastiques par les autorités mondiales, dans le but de ralentir la pandémie. De nombreux pays ont fermé leurs frontières et décrété des états d’urgence, exigeant parfois un confinement partiel ou total. Au total, 1 milliard de personnes sont appelées à ne pas sortir de chez elles. De plus, de très nombreuses industries sont à l’arrêt complet. Les conséquences économiques, sociales et politiques (entre autres) risqueront d’être colossales. Au même moment, l’environnement semble profiter de cette pause.
Les satellites de la NASA et de Copernicus (programme européen de surveillance de la Terre) ont pu constater les effets des mises en quarantaine de la Chine et de l’Italie. Les résultats de leurs observations sont frappants : la pollution atmosphérique a fortement chuté.
A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG
A new animation showing the variation of nitrogen dioxide emissions over ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter" (Dec-March) – thanks to ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter" ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter" data.
— ESA EarthObservation (@ESA_EO) ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter"
Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space.
ℹ️ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter" ESA EarthObservation on Twitter: "A new animation showing the variation of nitrogen dioxide emissions over #China (Dec-March) - thanks to @CopernicusEU #Sentinel5P data. Sentinel-5P currently provides the most accurate measurements of NO2 and other trace gases from space. ℹ️https://t.co/Gn9mvSnIu6 pic.twitter.com/nDLrboKnXG / Twitter"
Cette diminution de la pollution est le résultat de l’arrêt brusque de la plupart des industries (provoqué par la quarantaine des citoyens), mais elle est principalement la conséquence de la diminution rapide des transports terrestres, maritimes et aériens. Les spécialistes prévoient d’une forte baisse de la demande en pétrole, une première en dix ans.
Sur les réseaux sociaux, beaucoup de citadins confinés dans leur appartement (en Europe notamment) se réjouissent de pouvoir entendre les oiseaux. À Venise, les eaux sont devenues si claires que l’on peut voir le fond des canaux... À tel point que cette observation peut, d’une certaine mesure, se faire depuis l’espace ; comme en témoigne l’image captée par le satellite Sentinel 2.
According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN
According to Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter"'s 🇮🇹 citizens, waters have cleared following the Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter" lock-down. But what can we see from Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter" 🛰️🇪🇺?
— Copernicus EU (@CopernicusEU) Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter"
A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter" Copernicus EU on Twitter: "According to #Venice's 🇮🇹 citizens, waters have cleared following the #COVID19 lock-down. But what can we see from #Sentinel2 🛰️🇪🇺?A notable difference in boat traffic between 8 February & 19 March, as well as seemingly less turbid/agitated waters. What do you think?#EUSpace pic.twitter.com/HnqmjOdDCN / Twitter"
