This online platform uses data from the Copernicus Sentinel-5P satellite and shows the daily sulfur dioxide concentrations coming primarily from volcanic sources.
The sulfur dioxide map shown here is measured by the Tropomi instrument on the Sentinel 5 Precursor satellite. More information on the Tropomi SO2 measurements and quality assessment can be found in the Product Readme file.
The Copernicus Sentinel-5P SO2 measurements are those retrieved assuming SO2 at an altitude of 7km and explicitly filtering for pixels where a volcanic source is most likely (sulfurdioxide_detection_flag > 0) and where the solar zenith angle is within limits (SZA < 70°). The measurements are then mapped on a fixed latitude-longitude grid of 8193 x 16385 pixels. The grid is turned into an EPSG:4326 geotiff file using the appropriate color scale, which is again turned into an EPSG:3857 tile map.
Note that for data shown, SO2 from potential anthropogenic sources has not been filtered out, and SO2 from such sources can therefore still show up.
This service is provided as part of the Sentinel-5P Product Algorithm Laboratory (S5P-PAL) and contains modified Copernicus Sentinel data processed by S[&]T.
Questions regarding this service can be send to the ESA EO Support Helpdesk.