Influence of the atmospheric conditions on PM10 concentrations in Poznań, Poland

Bartosz Czernecki , Marek Półrolniczak , Leszek Kolendowicz , Michał Marosz , Sebastian Kendzierski , Natalia Pilguj

Abstract

This study investigates atmospheric conditions’ influence on the mean and extreme characteristics of PM10 concentrations in Poznań during the period 2006–2013. A correlation analysis was carried out to identify the most important meteorological variables influencing the seasonal dynamics of PM10 concentrations. The highest absolute correlation values were obtained for planetary boundary layer height (r = −0.57), thermal (daily minimum air temperature: r = −0.51), anemological (average daily wind speed: r = −0.37), and pluvial (precipitation occurrence: r = −0.36) conditions, however the highest correlations were observed for temporal autocorrelations (1 day lag: r = 0.70). As regulated by law, extreme events were identified on the basis of daily threshold value i.e. 50 μg m−3. On average, annually there are approximately 71.3 days anywhere in the city when the threshold value is exceeded, 46.6 % of those occur in winter. Additionally, 83.7 % of these cases have been found to be continuous episodes of a few days, with the longest one persisting for 22 days. The analysis of the macro-scale circulation patterns led to the identification of an easy-to-perceive seasonal relations between atmospheric fields that favour the occurrence of high PM10 concentration, as well as synoptic situations contributing to the rapid air quality improvement. The highest PM10 concentrations are a clear reaction to a decrease in air temperature by over 3 °C, with simultaneous lowering of PBL height, mean wind speed (by around 1 m s−1) and changing dominant wind directions from western to eastern sectors. In most cases, such a situation is related to the expansion of a high pressure system over eastern Europe and weakening of the Icelandic Low. Usually, air quality conditions improve along with an intensification of westerlies associated with the occurrence of low pressure systems over western and central Europe. Opposite relations are distinguishable in summer, when air quality deterioration is related to the inflow of tropical air masses originating over the Sahara desert.
Author Bartosz Czernecki
Bartosz Czernecki,,
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, Marek Półrolniczak
Marek Półrolniczak,,
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, Leszek Kolendowicz
Leszek Kolendowicz,,
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, Michał Marosz (FOG / IG / DMC)
Michał Marosz,,
- Department of Meteorology and Climatology
, Sebastian Kendzierski
Sebastian Kendzierski,,
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, Natalia Pilguj
Natalia Pilguj,,
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Other language title versions
Journal seriesJournal of Atmospheric Chemistry, ISSN 0167-7764, (A 25 pkt)
Issue year2017
Vol74
No1
Pages115-139
Publication size in sheets1.2
Keywords in Englishair pollution, particulate matter, PM10, atmospheric circulation, Poznań, Central Europe
DOIDOI:10.1007/s10874-016-9345-5
URL http://link.springer.com/content/pdf/10.1007%2Fs10874-016-9345-5.pdf
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)25
ScoreMinisterial score = 25.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 1.681 (2) - 2016=1.943 (5)
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