IASI Skin Temperature (IASI SkT) is a monthly (L3), 1×1 degree global dataset of skin temperatures over land derived from the IASI satellite radiances data. The data was computed using artificial neural networks over a selected set of IASI radiance channels, trained with ERA5-skin temperature product. Emissivity is also used as input in the neural network (Safieddine et al., 2020). This method was applied to the whole IASI time series to produce a homogeneous skin temperature data record from Sept. 2007 to the present. The dataset consists of monthly mean NetCDF files. Each file contains a grid organized by latitude (-90 to 90 °N) and longitude (-180 to 180 °E). Night and day data are separated in different files, based on the local time of IASI’s overpass at each grid point. Unit : degree Celsius.
First version number was 202008. A second version was 202205. The most recent version (202407) is now available.
IASI/Metop-A SkT data are available from September 2007 til December 2017.
DOI : https://doi.org/10.21413/iasi-ft_metopa_skt_l3_latmos-ulb
Data Access : https://iasi-ft.eu/data-access/SkT/
Publication : Safieddine, S., Sinnathamby, S., Hadji-Lazaro, J., Doutriaux-Boucher, M., Ghent, D., Whitburn, S., Clarisse, L., and Clerbaux, C.: Assessing Earth’s Skin Temperature Trends: Consistent Signals from IASI, MODIS, CCI and ERA5, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2026-400, 2026.
Contact : Sarah Safieddine (sarah.safieddine@latmos.ipsl.fr) or Cathy Clerbaux (cathy.clerbaux@latmos.ipsl.fr)
Citation : Safieddine, S. (2026). IASI-FT Skin Temperature (from IASI/Metop-A) version 202407 [Data set]. LATMOS/ULB. https://doi.org/10.21413/IASI-FT_METOPA_SKT_L3_LATMOS-ULB