This work presents a new evapotranspiration (ET) model derived from the METRIC algorithm, by explicitly partitioning ET into its transpiration (T) and evaporation (E) components. Indeed, there are already energy balance models that provide T and E separately. However, these models are highly sensitive to LST accuracy which is their main input. METRIC is a contextual model that uses the spatial variation of LST and not its actual value, which is an important advantage given the difficulty to compute LST using satellites data. Consequently, to take advantage of the contextual method employed in METRIC, METRIC-2S has been proposed to measure the gain in terms of ET estimates while estimating each ET component separately.