The main goal of our proposal is to characterize the surface radiative budget as well as cloudiness which features at the Argentine Bases Marambio and Belgrano II during the YOPP-SH Special Observing Period (SOP) as well as the YOPP Consolidation Phase

1 - radiation components at the surface, including global, diffuse and direct solar radiation, upwelling SW component, LW downwelling and upwelling fluxes, as well as spectral UV radiation.

2 - Cloudiness features, including, on a continuous base, cloud fraction derived both from radiometric measurement and sky camera observations, cloud type and cloud effect on SW radiation, estimate of Cloud radiative forcing (CRF), cloud base from routine observations performed at the station.

3 - From UV spectral measurements derived quantity as columnar ozone and erythemal dose.

All above parameters and evaluated quantities will be carry out at the two Argentine stations of Marambio and Belgrano II