Air quality variations and meteorological drivers of Guiyang city in clean atmospheric environment

SHU Zhuo-zhi1 ZHAO Tian-liang1 ZHENG Xiao-bo2 QIU Yu-jun1 SHI Ren-rui1 JIA Meng-wei1

(1.Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Joint International Research Laboratory of Climate and Environment Change, Nanjing University of Information Science and Technology, Nanjing, China 210044)
(2.Guizhou Institute of Mountainous Environment and Climate, Guiyang, China 550002)

【Abstract】Regional changes of urban air quality and meteorological effects were statistically analyzed based on environmental monitoring and meteorological observation data from 2013 to 2016 in the paper. In the recent four years, annual average concentrations of SO2, NO2, O3_8h, PM10, PM2.5 and CO were respectively (20.78 ± 19.71), (28.32 ± 9.59), (107.59 ± 27.54), (67.56 ± 34.32), (42.53 ± 24.52) μg/m3 and (0.74 ± 0.22) mg/m3 in Guiyang. Except for concentrations of SO2 close or exceeding central and eastern China, other air compositions kept in low levels. Ambient O3 concentrations significantly increased, while other air pollutant level declined with the similar patterns of inter-annual, monthly and diurnal variations with central and eastern China. The significant differences of air pollutants existed among industrial, residential and suburban areas with industrial area > residential area > suburb for particulate matter, SO2, NO2 and CO as well as suburb > residential area > Industrial area for surface O3 concentrations, reflecting impact of human activities on air quality. Air compound pollutants O3 and PM2.5 presented positive correlation in summer and but negative correlation in winter. Air temperature, boundary layer height, solar radiation and air pressure had significant impacts on pollutant concentrations, while relative humidity and wind speed had the weak influences, differently from wind speed dominating changes of air quality in central and eastern China.In summer, rainy season in Guiyang, PM2.5 hygroscopic growth was weak in light or moderate precipitation intensity with the obvious aerosol wash-out by large and heavy rainfall; both PM2.5 hygroscopic growth and removal of precipitation were more remarkable in the dry and cold winter.

【Keywords】 air quality; Guiyang; atmospheric pollutants; meteorological conditions; Yunnan-Guizhou Plateau;

【DOI】

【Funds】 Pilot Project of National Key Technology R&D Program to Research the Cause and Control Technology of Air Pollution (2016YFC0203304) National Natural Science Foundation of China Cultivation Project (91544109)

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This Article

ISSN:1000-6923

CN: 11-2201/X

Vol 37, No. 12, Pages 4460-4468

December 2017

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Article Outline

Abstract

  • 1 Materials and methods
  • 2 Results and analysis
  • 3 Conclusion
  • References