Solar irradiance prediction over the aegean sea
Shortwave parameterization schemes and aerosol radiation feedback
G. Methymaki (National and Capodistrian University of Athens)
E. Bossioli (National and Capodistrian University of Athens)
A. Dandou (National and Capodistrian University of Athens)
J. Kalogiros (National Observatory of Athens)
G. Biskos (TU Delft - Civil Engineering & Geosciences, The Cyprus Institute)
N. Mihalopoulos (University of Crete)
A. Nenes (Georgia Institute of Technology)
M. Tombrou (National and Capodistrian University of Athens)
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Abstract
In order to study the solar irradiance’s prediction over Greece, WRF-Chem model is applied, using three shortwave radiation parameterization schemes: Dudhia, Goddard and RRTMG which simulate differently the aerosol-radiation interaction. This study focuses on a typical summertime wind pattern, the Etesian outbreaks, during which polluted air masses are transported in Greek territory and therefore they affect incoming solar irradiance. The results indicate that schemes overall overestimate solar irradiance reaching the ground; Dudhia scheme by 9%, RRTMG by 13%, and Goddard by 17%. The performance of all schemes is improved when the aerosol-radiation interaction is considered at least by 1.5%, while local temperature changes, by up to 1.5°, are noticed.