On the use of daily precipitation projections for calculating the availability of workability days in 2021-2050

The aim of this study is to evaluate the impact of chmate change on availability of workability days, using the Agroscenari project climate scenarios for the period 2021 -2050. In this paper we present a method for extrapolating a sequence of 365-daily projections of precipitation, which constitutes the input for the workability days model. In order to maintain as much information as possible of inter-annual precipitation variability, we propose an alternative approach to the use of Ensamble Mean. Our proposai is based on a combination of cluster analysis and multiple sampling technique and let us also to bave a measure of the predictìon error.