This paper presents thermal conditions of grapes’ vegetation in south- -eastern Poland. Based on data from 5 stations from this area there were analyzed complex indices of the climate. There were compared periods 1971–2000 and 1991–2000. To show thermal conditions there were estimated date of beginning, ending and duration of thermal seasons. There were also estimated sum of active temperatures over 8 and 10ºC, LTI index. Significant change of climate in Poland is seen in growth of annual aver-age air temperature (specially in last two decades of XX century). A result of con-tinuous changing is that most changeable are spring and autumn. Seasons with temperature above 10ºC have a tendency to prolong and start earlier. Average dates of beginning of winter are different, it begins earlier and gets hotter. It was also noticed that dates of beginning of growing and vegetation period in 1991–2000 are different in comparing with 1971–2000. Sum of active temperatures (STA) and LTI index are higher in last ten years of XX century. These conditions could be positive aspects of climate changing. They can bring new possibilities for plants, which need higher temperatures and much sun-shine than traditional plants cultivated in climatic conditions of ...
The aim of the study was the characteristics of thermal-precipitation conditions in the Opole voivodeship on the basis of mean monthly air temperature, and precipitation values from the 1981-2010 period from the Łosiów, Stare Olesno, Opole, and Głubczyce weather stations. Basic statistical characteristics of the thermal-precipitation conditions were calculated. They were mean monthly, and annual air temperature, and precipitation values over the 30-year period, standard temperature deviations, and precipitation variability coefficients. It was also studied whether there were trends of change as far as temperature, and precipitation were concerned. In addition, the dates of the beginning, and end of thermal periods, as well as their lengths were determined. The determined periods were: thermal winter, the economic period, vegetation period, intense vegetation period, and ripening period, corresponding to the period of thermal summer. During the last stage of study, dryness indicator A was calculated. On the basis of the calculations carried out, it was stated, that in the Opole voivodship the mean annual air temperature ranged from 8.0ºC, and 9.1ºC, and in the case of two towns it increased significantly. A significant increase in monthly temperature was also observed in April, and in the summer months. The increase in temperature translated ...
