Copernicus Sentinel-5P Mapping Portal

This online platform uses data from the Copernicus Sentinel-5P satellite and shows averaged glyoxal concentrations across the globe – using a 14-day average, as well as monthly, seasonal and yearly averages. Using a 14 day average eliminates some effects which are caused by short term weather changes and cloud cover. The average gives an overview over the whole time period and therefore reflects trends better than shorter time periods.

The maps show the concentration of CHOCHO (glyoxal). CHOCHO is a good indicator for emissions of Volatile Organic Compounds (VOCs) as it is produced as a secondary product from their oxidation as well as directly emitted from combustion processes. Its short lifetime of a few hours leads to enhanced signals at proximity of its production sources. CHOCHO is also involved into the production of secondary organic aerosols (SOA), which affect both air quality and climate forcing.