The IASI CH4 and dust aerosols product are developed and distributed by the Infrared Team of BIRA-IASB.



Note: this dataset is generated as part of the ESA GHG-CCI project and is still under validation.

The IASI CH4 profiles are delivered in HDF5 format. Daily daytime and nighttime observations are provided in separate files. The HDF files contain CH4 profiles, the retrieval error, the a CH4 priori profiles and averaging kernels. Each individual file is typically 200-260 MB. If your data request is large, please contact the data manager (This email address is being protected from spambots. You need JavaScript enabled to view it.)

The retrievals are performed between 60°S and 70°N.

Important information for the users

When comparing the IASI CH4 or aerosol product with a high resolution profile (aircraft profiles, model data, lidar profile..), the sensitivity of the (low resolution) IASI profiles needs to be taken into account.

This can be done by smoothing the high resolution profile with the IASI averaging kernel :



Eq xsm   :  the smoothed (aircraft or model) profile

Eq xsa :  the IASI CH4 a priori profile

Eq A   :  the IASI CH4 averaging kernel

Eq x   :  the high resolution (aircraft or model) profile

Note, the averaging kernel is given in vmr/vmr units.



DOWNLOAD the IASI DUST aerosols PROFILE data (LEVEL 2, at IASI pixel resolution)

All details about the MAPIR product content and how to use it (.pdf). The current version of the algorithm is MAPIR v4.1; read more on the dedicated Mineral dust aerosols page.

For use of the data, please cite both the algorithm paper and the data set: Vandenbussche, S., Callewaert, S., & De Mazière, M. (2020). Vertical Profiles of Mineral Dust Aerosols from IASI (MAPIR algorithm) [Data set]. Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium.

Link to the doi repository with additional information on the files:


ACCESS the LEVEL 3 (daily and monthly averages on a map) DUST aerosols AOD and mean ALTITUDE from IASI through the Copernicus Climate Data Store

The IASI dust aerosol product is also available through the Copernicus Climate Data Store, in a limited version containing the dust AOD and the dust mean altitude as daily and monthly averages (level 3 data). To access that product, use the link here above then in the "download data" section, algorithm subsection, select "MAPIR (Mineral Aerosol Profiling from thermal Infrared Radiances)". Then only the other selections compatible with that choice will be available. The interested user will also see other dust aerosols products in the Climate Data Store.