Aerosol characteristics including fumigation effect under weak precipitation over the southeastern coast of China

Changes in PM10 concentration due to large-scale rainfall

“…The authors tend to focus on the effectiveness of the washout of solid particles of a specific size under specific rainfall types, and there is a lack of information about long-term field experiments on the effectiveness of the purification by large-scale precipitation of varying intensities in the absence of wind and direct insolation conditions. With minor exceptions (Laakso et al 2003;Tai et al 2010), experimental research is limited to continuous yet short-term observations (Davenport and Peter 1978;Schumann 1989;Maria and Russell 2005) or regards several instances over a small span of time and pertains to one type of precipitation (Jylha 2000;Chate and Pranesha 2004;Chate 2005;Zhang et al 2012). With the exception of Schumann (1989), Maria and Russell (2005) and Zhang et al (2012), authors do not consider the case of coarse particle removal, which constitutes the standard indicator of air quality.…”

Concentration Changes Of PM10 Under Liquid Precipitation Conditions

“…Besides, the changes in the concentration of aerosols in the troposphere after the occurrence of precipitation resulting from the extensive effect of horizontal air masses, could also occur in areas both in the vicinity of and distant from the source of pollution [8]. With small exceptions [27,28], experimental research is limited to continuous, yet short-term observations [29][30][31] or regards several instances with a small span in time and pertains to one type of precipitation [32][33][34]. With the exception of [30,31,34], authors do not consider the case of coarse mode of PM 10 scavenging.…”

“…With small exceptions [27,28], experimental research is limited to continuous, yet short-term observations [29][30][31] or regards several instances with a small span in time and pertains to one type of precipitation [32][33][34]. With the exception of [30,31,34], authors do not consider the case of coarse mode of PM 10 scavenging. This paper reports the results of research into the variability of the scavenging coefficient for PM 10 in the ground-level zone in the atmospheric conditions that lead to the development of rainfall.…”

Comparison of PM10 washout on urban and rural areas

“…The effectiveness of wet deposition in the scavenging of particulate matter from the troposphere has been the subject of reports in a large number of research works [2,9,16,[21][22][23][24][25][26][27][28][29]. These processes are recognized both on a complex scale (including details of the effectiveness of particulate matter scavenging when accompanying particular types of precipitation) and on a detailed scale (when the effectiveness of specific types of particles is investigated with regard to the type of precipitation which carries them).…”

“…What is noteworthy is that the variations in the concentration of aerosols in the troposphere following precipitation can also occur in areas both in the vicinity of, and remote from pollution sources as a result of the effect of transport with horizontal air masses [16]. With the exception of a few papers [9,25,29], authors do not report results of the scavenging of aerosols, which are standard indicators of air quality in a given area.…”