Variability of weather extremes in Poland in the period 1951-2006

Abstract

[ES]Series de indices de temperatura y precipitación extremas en el periodo 1951-2006 se calcularon a partir de datos de precipitación diaria y temperatura máxima y mínima en 21 estaciones en Polonia. dado que la distribución de indices de extremos es en general bastante distinta de la normal, en particular para indices que expresan ocurrencias diarias, los estimadores de tendencias mas usuales no son robustos en este caso. Se utilizaron el test tau de Kendall y el estimador de tendencias de Sen y sus resultados fueron comparados con los obtenidos con métodos mas tradicionales.

[EN]Daily precipitation totals and daily minimum and maximum temperatures from 21 Polish stations were used to calculate records of indices of temperature and precipitation extremes in the period 1951-2006. Because the distributions of extreme indices are generally far from normal, especially for indices defined as day counts, the popular trend estimators like linear trend calculated by the least mean squares method are not robust. The Kendall tau test and Sen's trend estimators were used and their results were compared with those obtained by more traditional methods.