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Charging Effect on the 80-200 nm Size Atmospheric Aerosols during a Lightning Event

Title
Charging Effect on the 80-200 nm Size Atmospheric Aerosols during a Lightning Event
Author
안강호
Keywords
Atmospheric particle charging; Charging polarity reversal; Lightning effect; Charged cloud; URBAN AREAS; PRECIPITATION; PARTICLES
Issue Date
2017-11
Publisher
TAIWAN ASSOC AEROSOL RES-TAAR
Citation
AEROSOL AND AIR QUALITY RESEARCH, v. 17, No. 10, Page. 2624-2630
Abstract
Atmospheric aerosol charging is caused mainly by cosmic rays and/or natural radioactive material decay. Because the ionization process generates well-balanced ion pairs, positive and negative ions in the air are at almost the same concentrations. The atmospheric aerosol electrical charge is therefore usually neutral. We measured the particle charge polarity distribution in the atmosphere during a lightning event at ground level. We found that the 80-200 nm particle charge balance during a lightning event was skewed either to the positive or the negative. Furthermore, the particle charge polarity changed very rapidly (within a few minutes) from negative to positive or vice versa. There was also a two-fold higher charged particle fraction during a lightning period than a normal day. This increased charged particle fraction may decrease the total particle concentration in the atmosphere by deposition on raindrop surfaces.
URI
http://aaqr.org/article/detail/AAQR-17-05-TN-0178http://repository.hanyang.ac.kr/handle/20.500.11754/103772
ISSN
1680-8584; 2071-1409
DOI
10.4209/aaqr.2017.05.0178
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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