The Course of the Atmospheric Pressure in Lublin in the Years 1951–2010

Abstract

The paper presents the general characteristics of the monthly, seasonal and annual course of atmospheric pressure in Lublin for the years 1951–2010.
Some data used comes from UMCS Meteorological Observatory located in the centre of Lublin. Measurements were performed using a mercury barometer located in the building at a height of 206.4 m and 11.1 m above the ground, three times a day, at 7.00, 13.00 and 21.00 local solar average time.
Annual, seasonal and monthly mean values of atmospheric pressure at the station level were calculated. Also values of deviations from the long–term values of average pressure were calculated.
Long–term average atmospheric pressure in Lublin in the years 1951–2010 was 991.5 hPa. This value varied from 989.0 hPa in 2010 to 994.2 hPa in 1953.
The annual highest average monthly value was recorded in October and the lowest in April. The range of average monthly variation is 5.2 hPa. The highest monthly range of variation was in December – 27.5 hPa and in February (22.8 hPa), and the lowest in June – 8.2 hPa and in September – 9.9 hPa.
As far as different seasons of the year are concerned, the highest average pressure values were recorded in autumn and winter. In spring and summer, these values were similar and the lowest as well.
Pressure values and their changes during the year depend on the position and the level of activity the main centres of the atmosphere pressure in Europe.