A multi-model benchmarking of direct and global clear-sky solar irradiance predictions at arid sites using a reference physical radiative transfer model

•15 clear-sky radiation models are intercompared at 11 sites relevant to solar energy.•The RRTMG physical radiative transfer model is used for benchmarking.•Inter-model disagreement is related to atmospheric conditions and/or high elevation.•Compared to RRTMG, 9 models perform well for GHI, 5 models...

Ausführliche Beschreibung