Influence of aerosols on the meteorological regime of Northern Eurasia according to COSMO-Ru Model

Abstract

We provided the estimation of the aerosols effect at the surface and at the top of the atmosphere, as well as on the sensible and latent heat flux for the Northern Eurasia using the MACv2 aerosol climatology. The numerical experiments were performed with the COSMO-Ru model for the January and July in 2017. It is found that the aerosol radiation effect on the surface can reach -50 W/m2. At the same time, it is shown that the net shortwave radiation increase does not unequivocally leads to the air temperature at two meters increase. We revealed that the temperature at 2 meters decreases on -0.5±0.1 degrees per 100 W/m2 in the clear sky condition for Mediterranean, Red, Black and Caspian seas areas. The temperature sensitivity is positive and equals 0.9±0.3 degrees per 100 W/m2 for Middle East and southern Europe and 1.7±0.7 degrees per 100 W/m2 for northern Africa.