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- Title
三亚市区臭氧污染变化特征及潜在源区分析.
- Authors
符传博; 丹利; 佟金鹤; 徐文帅
- Abstract
Based on two environmental monitoring data and meteorological observational data in Sanya City, Hainan Province, spatiotemporal variation characteristics and meteorological influence of the O3-8 h (defined as the maximum 8 h av⁃ erage result) were analyzed using the backward trajectory simulation, cluster analysis, PSCF (potential source analysis func⁃ tion) and CWT (concentration weight trajectory) methods. The results show that the variations of O3-8 h at two stations in Sanya City is opposite from 2014 to 2020, and their climatic change rate were 0.303 μg/(m3 ·a) and -0.405 μg/(m³ ·a), respectively, which not passed the significance test. The monthly variation of O3-8 h shows a“V”-shaped distribution, with the maxi⁃ mum value occurred in October. The daily variation is unimodal, with a peak value around 15:00. The exceedance probability of O3-8 h concentrations was relatively high when the average temperature was around 15~25 ℃, relative humidity was be⁃ tween 65% and 80%, the total solar radiation ranged 14~24 MJ/m², sunshine duration was between 6 h/d and 10 h/d, and wind speed of the northeast wind was between 6 to 12 m/s. Multiple regression analysis showed that 10 m average wind speed, relative humidity, sunshine duration and average temperature are the main dominate factors on O3-8 h. The inland northeast air flow and coastal northeast air flow in autumn, the coastal northeast air flow in spring and the short-distanceair flow and northeast air flow in winter are likely to cause the above-normal O3-8 h concentration, and the exceeding rates are 13.61%, 2.31%, 1.44%, 0.95% and 2.76%, respectively. Fujian, Jiangxi, and Guangdong provinces are the main sources to O3 pollution in Sanya City.
- Subjects
JIANGXI Sheng (China); HAINAN Sheng (China); FUJIAN Sheng (China); AIR flow; MULTIPLE regression analysis; CLIMATE change; WIND speed; SPRING
- Publication
Environmental Science & Technology (10036504), 2023, Vol 46, Issue 1, p152
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.1573.22.338