|
|
vol. 9, nr. 3 (2007)
|
Potential evapotranspiration and precipitation in Wroc³aw-Swojec during the period 1965-2000
|
|
|
El¿bieta Musia³
1, Marian S. Rojek
2
|
|
| (get PDF )
|
|
|
1 Department of Mathematics, Wroclaw University of Environmental and Life Sciences
ul. Grunwaldzka 53, 50-357 Wroc³aw
|
|
|
2 Institute of Environmental Development and Environmental Protection,
Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 24, 50-363 Wroc³aw
|
|
|
vol. 9 (2007), nr. 3,
pp. 685-698
|
|
|
abstract:
The study presents analysis of changes in ten-day, month and half-year sums of precipitation (P), potential evapotranspiration (PET) and climatic water balance (CWB) defined as a difference between P and PET. Calculations for all ten-day periods during the summer half-year (IV-IX) were based on the measurements from the Wroc³aw-Swojec Agro- and Hydrometeorology Observatory in the period 1965-2000. Sums of potential evapotranspiration were calculated according to the original version of Penman's equation. Mean and extreme values, as well as standard deviation, were analysed in all periods under consideration. Linear trend equations were determined. They point at increasing tendency in potential evapotranspiration sums and decreasing tendency in precipitation sums during the analysed 36-year period. The biggest changes in time were observed in the case of climatic water balance, then in precipitation. The smallest change was seen in the case of potential evapotranspiration.
|
|
keywords:
potential evapotranspiration, climatic water balance, precipitation, linear trends
|
|
original in:
Polish
|
|
|
|
|
|
