Global map of mean TI derived from OMEGA at a resolution of 4 ppd (∼15 km × 15 km at the equator). Map is restricted to latitudes between 45°S and 45°N. Minimal value of mean TI is 30 J m−2 s−1/2 K−1 and maximal value is 1050 J m−2 s−1/2 K−1.