PRECIPITATION VARIABILIY AND TENDENCY IN KRAKOW FOR THE PERIOD 1850-I997 RELAED TO CICULATION PATEERNS

摘要

The paper analyses the long-term variability of precipitation in Erakow and establishes precipitation trends in relation to circulation patterns. Data for annual, semi-annual, seasonal and monthly precipitation totals from the 1850- 1997 period was used. Averages, maxima, minima, standard deviations and variability coefficients were presented. Correlation coefficient values were calculated between the precipitation totals and the cycloincity indices C, determined on the basis of the classification of cireulation types proposed by T Niediwiedz for the period 1874-1995. The annual precipitation totals did not sbow any trend. Precipitation variability is characterised by regular fluctuations. In the entire data series it is only in January and July that the precipitation displays any significant trends, which are rising and falling, respectively. The precipi- tation variability in Krakow shows significant correlation with the fluctuations of the C-index and this correlation was most pronounced in the cold half-year (November -April) and in October.