Application of statistical analysis for identification of climatic tendency

With the objective to give a statistical treatment in the identification of climatic change and annual tendency, time serie from 1924 to 1998 of rainf all and surface air temperatures for the meteorological station of Urussang a (latitude 28 degrees 31 ' S, longitude 49 degrees 19 ' W and altitude of 48.2 m) was analyzed. The analyses were made through regression analyses an d the non-parametric tests of Run, Mann-Kendall and Pettitt. The results in dicate warming trends for the mean annual temperature and for January mean temperature, with the change point in 1965. July mean temperature did not p resent any significant trend. The total annual rainfall and the total rainf all in the fourth trimester of the year presented. significant tendency of increasing. For the first three trimesters no significant trend was detecte d on the total rainfall.