Adéla Holubová Šmejkalová This email address is being protected from spambots. You need JavaScript enabled to view it., Jáchym Brzezina 

Czech Hydrometeorological Institute, Na Šabatce 2050/17, 143 06 Prague 4-Komořany, Czech Republic

Received: March 14, 2022
Revised: June 24, 2022
Accepted: August 1, 2022

 Copyright The Author's institutions. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited. 

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Cite this article:

Šmejkalová, A.H., Brzezina, J. (2022). The Effect of Drought on PM Concentrations in the Czech Republic. Aerosol Air Qual. Res. 22, 220130.


  • A difference was found in PMx concentrations depending on the extent of drought.
  • A relation was found between the number of consecutive dry days and PM10 conc.
  • A correlation was found between PMx conc. on dry days and soil temperature and moisture.


The main focus of this study is the effect of drought on air quality in the Czech Republic. PMx (PM10 and PM2.5) concentrations at 21 air quality monitoring stations of different types (rural, suburban and urban) were studied during a 10-year period from 2010 to 2019. Only data measured during the vegetation period (April–September) were used. In addition, other meteorological factors were taken into account as well, in particular wind speed, air and soil temperature and soil moisture. It was found that PM10 concentrations were higher by 26.7 to 46.7% during dry periods with the difference being statistically significant. A strong correlation was found between PM10 and PM2.5 concentrations and the soil temperature and moisture, particularly at the top soil layer (0–10 cm depth). Results of the study show that soil moisture affects the extent of resuspension and soil erosion. Soil moisture values above 36% create unfavourable conditions for resuspension or erosion even when soil temperature is higher than 20°C.

Keywords: Air pollution, Drought, Particulate matter, Soil erosion

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