China’s NO2 emissions now rising

In English Sentinel-5p

Olivier Hagolle, 28 mars 2020

NO2 emissions are rising again over China, showing the slow recovery of Chinese industry after a two-month shutdown. The graph below was obtained from Sentinel-5p data using the NO2 time series Google Earth Engine app.

Total vertical column of NO2 (ratio of the slant column density of NO2 and the total air mass factor) from 01 January to 27 March. Daily average over Mainland China. Data source: Copernicus Sentinel-5P NRTI NO2: Near Real-Time Nitrogen Dioxide.
Global NO2 monitor

Plus d'actualités

Pléiades © CNES 2026 Distribution Airbus DS

Clear-sky Pléiades acquisition of the Rasuwa landslide source area

After many attempts, CNES’s Pléiades satellites finally captured a clear-sky view of the source area of the devastating flood in Nepal. The stereoscopic acquisition enables the generation of a high-resolution DEM and consequently a geometrically accurate orthorectified image. Although I’m not involved in the scientific analysis, I could not resist taking a closer look at […]

New clear-sky image of the Rasuwa rock-ice avalanche

On 08 Sep 2026, Sentinel-2 acquired a clear-sky image near the release area of the landslide which caused the catastrophic flood in Nepal. Using this image and a pre-event digital elevation model (Berthier 2026) we can analyze the upper part of the avalanche runout profile. The block of rock and ice was released near 5120 […]

How long is the cooling effect of a cloud shadow ?

How long does it take for the cannon barrel to cool down after firing a shell ? Fernand Raynaud => This quote is from a famous old French funny sketch by Fernand Raynaud, which was based on a question in a French manual for soldiers: the sketch is rather long, so I’ll give you the […]

Rechercher