Effects of Asian air pollution transport and photochemistry on carbon monoxide variability and ozone production in subtropical coastal south China

摘要: [1] Surface ozone and carbon monoxide (CO) measured from a relatively remote coastal station in Hong Kong are analyzed to study the effects of pollutant transport associated production on CO variations subtropical south China region. concentrations show common minimum summer maritime air masses South Sea Pacific Ocean. They have higher values other seasons continental that passed over mainland Asia East Asian coast. shows maximum monthly median 457–552 ppbv winter while 40–50 autumn distinct peak 41–43 spring. The especially (median 277 428 ppbv) very high when compared with measurements most parts world. This suggests region is under strong influence continent Ozone positive correlations polluted late spring early (May–September) linear regression slopes ozone-CO plot 0.08 0.22 (with respective standard errors 0.01 0.03). plus levels indicate there substantial pollution period.