TEMPORAL ANALYSIS OF PRECIPITATION AND RAIN SPELLS IN ARGENTINIAN CENTENARY REFERENCE STATIONS

SCARDILLI, ÁLVARO SANTIAGO; LLANO, MARÍA PAULA; VARGAS, WALTER MARIO

THEORY & APPLICATION CLIMATOLOGY

SPRINGER WIEN

Lugar: Viena; Año: 2015

0177-798X

Different rainfall parameters are analysed in the present work in orderto describeprecipitation in three Argentine reference stations. These locations represent theirprecipitation climate region through a centenary data record. The selected parametersare: annual accumulated precipitation, number of days with precipitation, andprecipitation intensity. All three stations indicate a positive trend in the first twovariables over the studied period; moreover, because of a proportional increase, theprecipitation intensity parameter has no significant variability. From the analysis ofthese variables and applying statistical methods, a climatic jump is found in eachstation, around the 1950s.A second focus of this work is the analysis of rain spells. To this end, a cut-off value foreach station is found and usedso as to establish the relationship between theaccumulated precipitation and the frequency of rain spells per year. The total numberof rain spells follows an exponential decay function for their relative frequency,considering the number of days that constitutes them. Rain spells characterizationallows for the understanding of their contribution to precipitation, according with itsduration.