  The reliability of ERA5 satellite-based air temperature data is under
investigation in this paper. To evaluate this, the ERA5 data will be compared
with land-based data obtained from weather stations on the Global Historical
Climatology Network. Two climate regions are taken into consideration,
temperate and tropical. Five years' worth of data is collected and compared
through box plots, regression models and statistical metrics. The results show
that the satellite temperature performs better in the temperate region than the
tropical region. This suggests that the time of year and climate region have an
impact on the accuracy of the satellite data as milder temperatures produce
better approximations.
