PM10 concentration reduction due to the wet scavenging in the Ciuc Basin, Romania

The PM₁₀ concentration reduction caused by large-scale precipitation in the Ciuc Basin was studied under no-wind conditions. The PM₁₀ concentration changing before, during, and after the rainfall was followed up from 2008 to 2019. After the rainfall episode, the PM₁₀ concentrations were lower in the cold and warm periods with 2.8 μg/m^3, and 2 μg/m³ respectively. The highest PM₁₀ concentration reduction was detected in the cold season, by the moderate and light rain intensity, after 6 hrs of continuous rain (35.61%, 32.46%), and the average PM₁₀ concentration reduction in the cold and warm periods was 22.3% and 16.1% respectively.