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- W2493557599 abstract "Abstract Cloud-to-ground (CG) lightning, meteorological conditions and corresponding surface nitrogen oxides (NO x ) and ozone (O 3 ) variations in relation to thunderstorm and lightning activities over Hong Kong at Kwai Chung (urban), Tung Chung (new town) and Tap Mun (background) during active lightning seasons from 2009 to 2013 were studied by analyzing respective air quality monitoring station data along with CG lightning and meteorological data. We observed NO x enhancement and significant O 3 decline on lightning days. Influences of land use types, lightning activities and meteorological conditions on surface NO x and O 3 were examined. NO x and O 3 concentrations shifted towards higher and lower levels, respectively, during lightning days especially in the dominant wind directions. Principal component analysis/absolute principal component scores (PCA/APCS) method and stepwise multiple linear regression (MLR) analysis were employed to examine the influence of thunderstorm related lightning and meteorological parameters on surface NO x and O 3 . Wind speed was supposed to be the most important meteorological parameter affecting the concentration of NO x , and lightning activities were observed to make a positive contribution to NO x . Negative contribution of hot, cloudy and wet weather and positive contribution of wind speed were found to affect the concentration of O 3 . Lightning parameters were also found to make a small positive contribution to O 3 concentration at Tap Mun and Tung Chung, but the net effect of lightning activities and corresponding meteorological conditions was the decrease of O 3 on lightning days. Reasonably good agreement between the predicted and observed NO x and O 3 values indicates that PCA/APCS-MLR is a valuable method to study the thunderstorm induced NO x and O 3 variations." @default.
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- W2493557599 date "2016-12-01" @default.
- W2493557599 modified "2023-09-27" @default.
- W2493557599 title "Effect of cloud-to-ground lightning and meteorological conditions on surface NOx and O3 in Hong Kong" @default.
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- W2493557599 doi "https://doi.org/10.1016/j.atmosres.2016.07.021" @default.
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