Variability and Time Course of Nitrogen Oxides Concentration in Poznan (Middle-Western Poland) and Their Dependence on Wind Direction

Variabilita a časový priebeh koncentrácie oxidov dusíka v Poznani (Stredozápadné Poľsko) a ich závislosť na smere vetra

Eliza Kalbarczyk, Robert Kalbarczyk

In: Geografické informácie (Geographical Information), Ročník (Volume) 20, Číslo (Issue) 2, 2016, p. 201-215, ISSN 1337-9453

DOI: 10.17846/GI.2016.20.2.201-215

Abstract

The aim of the work was to determine the variability of nitrogen oxides concentration in the years 2005-2014 in Poznan in relation to variable meteorological elements. The study material was the values of mean hourly concentrations of NO and NO2 in 2005 - 2014, and also the results of hourly measurements of the meteorological elements: solar radiation, air temperature, relative air humidity, direction and speed of wind and atmospheric pressure, from the station of State Environmental Monitoring in Poznan. In the years of study the mean level of NO2 concentration in Poznan was 2 - 3 times higher than that of NO, and its time course exhibited clear seasonal character. The largest mean level of pollution was usually observed in the autumn-winter season and in early morning and evening hours. Of the meteorological elements considered, the variability of NO and NO2 was modified the most by the wind direction, and then by its velocity and air temperature.

Keywords: air pollution, climate, wind rose, transport

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