Copernicus Sentinel-5P Mapping Portal
esa european commission

Sentinel-5P Total Column Water Vapour

This map is based on PRE-OPERATIONAL Sentinel-5P L2 products. It may get updated at any point without advance notice, and long term availability is not guaranteed.

About Total Column Water Vapour

This online platform uses data from the Copernicus Sentinel-5P satellite and shows the daily total column water vapour across the globe, as well as monthly, seasonal and yearly moving averages.

Water vapour is one of the major components in the atmosphere with strong impacts on the earth's climate and weather. Water vapour absorbs radiation in the infrared spectral range and its abundance in the atmosphere, making it the most important natural greenhouse gas.

The Total Column Water Vapour (TCWV) generated by S5P-PAL is a pre-operational TROPOMI product. In contrast to other satellite sensors, TROPOMI provides daily global measurements of TCWV over land and ocean.

The TCWV retrieval algorithm using the visible blue spectral band was originally developed by DLR for GOME-2 and optimized for TROPOMI in the framework of the S5P-PAL project.

The total column water vapour map shown here is measured by the Tropomi instrument on the Sentinel 5 Precursor satellite. The Tropomi measurements are performed in the visible part of the spectrum. More information on the Tropomi total column water vapour measurements and quality assessment can be found in the Product Readme file.

About this S5P-PAL map

The maps shown on this site have been based on the latest pre-operational Sentinel-5P Total Column Water Vapour Level-2 products (L2__TCWV__), available from the S5P-PAL data portal . The readme file of this product can be found here.

The Copernicus Sentinel-5P total column water vapour measurements were first filtered based on the recommendation in the Product Readme file (only data with a qa_value > 0.50 was used). Then the measurements are 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.

The maps and underlying Level-3 gridded data files were generated by S5P-PAL. The Level-3 data can be downloaded from the S5P-PAL Data Portal, or directly via the download button below the map.

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.