Radiation budget NET

The difference between the downward shortwave SW_d longwave irradiance energy flux - LW_d and the upward fluxes of SW_u and LW_u in the 0.3-100 µm wavelength range. Values are  expressed in [Wm^-2]. The SatBałtyk System provides maps of mean daily values of the radiation budget with a spatial resolution of 1 km.

Methodology

Maps of the radiation budget are determined on the basis of mean daily maps of downward and upward long- and short-wave radiation, plotted within the SatBałtyk System (SBRS model [1]).

Validation The statistical error, expressed as the standard deviation of the differences between values measured in situ and those determined using the satellite model for mean daily values, was  σ=15.5 Wm^-2. The systematic error (the mean difference between measured and calculated values) was estimated at -5.5 Wm^-2. The validation was based on empirical data gathered on the Baltic Beta drilling rig in the Baltic Sea (φ=55°28’50.9’’N, λ=18°10’44.7’’E).

Fig. Comparison of mean daily values of the radiation budget measured NET_real and calculated NET_model using the SBRS model

[1]SBRS - Surface Radiation Budget for SatBałtyk