Mateusz Dobek

The influence of atmospheric circulation on bioclimatic conditions in Lublin (Poland)

Abstract This study evaluates the relationship between atmospheric circulation conditions and the frequency of heat/cold stress in Lublin in the years 1951-2010 according to the Universal Thermal Climate Index (UTCI). The paper outlines the frequency and conditional probability of heat/cold stress during particular circulation types and analyses the circulation patterns that induce these incidences. Increased wind velocity had a significant effect on creating unfavourable bioclimatic conditions in winter. Meanwhile, in summer, heat stress was observed almost exclusively when a high pressure system from eastern Europe induced a slow inflow of very warm air masses from the east or south.

Precipitation‐free periods and water resources in the Lublin region, SE Poland

Purpose – The moist periods with high precipitation and periods of atmospheric droughts are a potential great hazard to the functioning of ecosystems and different sectors of the national economy in the Lublin region. Therefore, a recognition of time variability of these atmospheric phenomena and the conditions of their occurrence are the main aims of this paper.Design/methodology/approach – The analysis of the precipitation‐free periods was based on the meteorological data from the years 1951‐2009 recorded in the Meteorological Observatory of the Maria Curie‐Sklodowska University in Lublin. Main hydrological data concerning dynamics of groundwater table and surface water table came from the measurement network of the Institute of Meteorology and Water Management.Findings – Very long precipitation‐free periods, lasting over 20 days, appeared only seven times – once a year in 1953, 1956, 1959, 1971, 1983, and twice in 2000. Since the 1980s, the number of precipitation‐free periods has been decreasing paral...

SOME REMARKS ON THE HIGHEST WIND SPEED VALUES IN LUBLIN

Abstract This paper presents and analysis of the highest wind speed values recorded at the Meteorological Observatory of the Maria Curie-Skłodowska University in Lublin. The study uses values recorded data (3 times a day) for the period 1981-2005. During the 25 years of the study period there were 19 occasions of wind speed ≥ 10 m·s-1 and 14 cases of winds gusting at or over 20 m·s-1. Both kinds of situation were noticed most often in January and did not occur in May, June, July or August.