IASI Atmospheric Temperature Profiles (ATP) from IASI-Metop-A

The IASI atmospheric temperature profiles product (IASI ATP) is a daily 1°x1° global dataset of atmospheric temperatures derived from all IASI radiance observations. The temperatures profiles are given on 11 static pressure levels from 750 to 2 hPa. The method used to retrieve atmospheric temperatures from IASI radiances is detailed in Bouillon et al., 2021 (to be submitted very soon). It relies on an Artificial Neural Network (ANN) trained with 450 000 observations (IASI observations and NOAA-CO2 in input, ERA5 observations in output. The trained ANN was applied to reprocessed IASI L1C data, in order to produce a homogeneous atmospheric temperature record from 2008 to present. The dataset consists of daily mean NETCDF files of around 3 MB each (total 14 GB for the 2008-2017 period available to date). Each file includes the gridded daily atmospheric temperature profiles (day and night mixed together). Missing values are set at NaN. Size of the grids: 90 lines (from -89.5 to 89.5 °N), 180 columns (from -179.5 to 179.5 °E), 11 aisles (pressure levels: 2, 7, 10, 30, 20, 70, 100, 200, 400, 550 and 750 hPa). Unit: K.