Boundary layer perspective assessment of air pollution status in Wuhan city from 2013 to 2017

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dc.contributor.authorMbululo, Yassin
dc.contributor.authorQin, Jun
dc.contributor.authorYuan, Zhengxuan
dc.contributor.authorNyihirani, Fatuma
dc.contributor.authorZheng, Xiang
dc.date.accessioned2021-04-30T08:30:49Z
dc.date.available2021-04-30T08:30:49Z
dc.date.issued2019
dc.descriptionJournal articleen_US
dc.description.abstractThis study used daily air pollution data (PM2.5, PM10, SO2, NO2, CO, and O3) from nine monitoring stations inWuhan city to calculate the air quality index (AQI) from 2013 to 2017. Together with this data, L-band sounding data, ground meteorological data, and air mass back trajectories were also used to describe the dynamics of atmospheric boundary layer (ABL) during pollution process. Analysis of the results shows that, even though the city is still polluted, the number of polluted days was decreasing. Ranking the years in terms of pollution status shows that the year 2013 was the most polluted year while the year 2017 was the cleanest year. Average annual limit of PM10, PM2.5, and NO2 during these 5 years were 1.3~1.8, 1.5~2.7, and 1.2~1.5 times higher than the annual average acceptable limit, respectively. The average ratio of PM2.5/ PM10 for 5 years was 0.67 which signifies that a significant portion of PM2.5 accounted for the total mass of PM10. Moreover, the condition of ABL during the pollution process shows the dominance of strong ground inversion and weak to calm winds. These conditions are not favorable for horizontal and vertical mixing of air pollutants and prevent dilution of pollutants with clean air. Mean cluster analysis of air mass back trajectory shows that pollutants of local origin were more important than the trans-boundary movement of air pollutants. This indicates that the observed pollution in Wuhan was more of local originen_US
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/3500
dc.language.isoenen_US
dc.publisherSpringer Nature Switzerlanden_US
dc.subjectAir pollutionen_US
dc.subjectAir quality indexen_US
dc.subjectAir pollutantsen_US
dc.subjectAtmospheric boundary layeren_US
dc.subjectPM2.5en_US
dc.titleBoundary layer perspective assessment of air pollution status in Wuhan city from 2013 to 2017en_US
dc.typeArticleen_US
dc.urlhttps://doi.org/10.1007/s10661-019-7206-9en_US

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