Open AccessVariability in PM2.5 and meteorological effects on their mass concentrations over Fuzhou, China during 2014-2016
Author(s) -
Junyi Li,
Yulin Huang,
Danmei Sun,
Zhixin Xu,
Yuxiang Lan,
Ye Chen,
Jianwen Dong
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/450/1/012093
Subject(s) - mass concentration (chemistry) , particulates , typhoon , environmental science , atmospheric sciences , relative humidity , correlation coefficient , climatology , zoology , meteorology , chemistry , geography , mathematics , physics , geology , statistics , organic chemistry , biology
Simultaneous measurements of mass concentrations of PM 2.5 along with other co-existence pollutants viz., SO 2 , CO, NO 2 and O 3 , were studied with hourly datasets and the data of meteorological conditions were measured per 3 hours from 1 st Sep 2014 to 30 th Sep 2016 at Fuzhou city, China. The concentration of PM 2.5 is 28.42 ± 14.75 in the study period. Meanwhile, the seasonal ratio of PM 2.5 was also analysed, with the maximal value as 0.61 in winter, 0.52 in spring, 0.49 in autumn and 0.44 in summer. This implied that fine particulate reaches the maximal value in winter and the minimum value in summer. The correlation coefficient between concentrations of PM 2.5 and SO 2 , CO, NO 2 , and O 3 concentrations were 0.64, 0.52, 0.53 and 0.67. There existed negative correlation between PM 2.5 and T (– 0.27), HCC (– 0.13), WS (– 0.16), VIS (– 0.46), DT (-0.31) and RF (-0.10). Subsequently, the impacts of typhoons on the mass concentrations of PM 2.5 during September 10th 2016 to September 16th 2016 were analyzed during which the mass concentration of PM 2.5 decreased at a large extent and the fine particulates have more prominent changes during the typhoon period compared with coarse particulates.