Determination of the pluviometric deficit as a base for the climate classification in Albania

The sum of all climatic parameters known until now, in a strict understanding, cannot be the same as climate itself. The climate is the parameters we know plus potential evapotranspiration. The purpose of this paper is first, to quantify the potential evapotranspiration and then, combining it with the rainfall values, to quantify the pluviometric deficit all over Albania as a substantial precondition for climate classification. The functions of both, potential evapotranspiration and rainfall over time, resulted to be polynomial ones, because the highest regression coefficients were found comparing with other types of functions. A correlation coefficient significant for high probability values was found between the magnitude and the duration of pluviometric deficits. The entire country, based on the findings showed, could be divided into three main areas extended from the aridity to the humidity scale. However, this preliminary basic conclusion is supposed to be verified when the pluviometric deficit quantified already, as it will be shown in this article, is going to be used for the moisture index determination, as it is indicated in the Thornthwaite’s research work.