Data products

Aerosol Layer Height


The TROPOMI Aerosol Layer Height (ALH) product focuses on retrieval of vertically localized aerosol layers in the free troposphere, such as desert dust, biomass burning aerosol, or volcanic ash plumes in layers for cloud-free scenes. Applications include radiative forcing studies, long-range transport modeling and studies of cloud formation processes, and are of use for aviation safety. Retrieval of aerosol height is based on absorption in the O2 A band in the near-infrared wavelength range (759 and 770 nm). The figure below is from the KNMI UV Lidar at Cabauw, NL that captured a volcanic aerosol plume on 18 April 2010. It is anticipated the TROPOMI ALH data product will retrieve mid-pressure layer heights for this type of plumes.

UV Lidar image volcanic plume

Data product version summary (click current version number for latest PUM).
Version number Version Effective Date Summary of Changes
1.01.00 Next planned update  
0.11.8 21-Dec-2017 to present Not yet released
0.11.4 launch to 20-Dec-2017 First data production



Links to the Algorithm Theoretical Basis Document (ATBD) and the Product User Manual (PUM) are located on the right of this page under Documentation. This data product is planned for release at the end of 2018. Once released, the Product Readme files (PRF) will be made available here.