【摘要】 该文基于三亚市区2个环境监测数据，结合气象观测资料，采用后向轨迹、聚类分析、潜在源区贡献因子算法和权重轨迹方法研究了三亚市日最大8 h平均（O₃-8 h）质量浓度时空变化特征与气象因子的关系，以及O₃传输路径和潜在贡献源区。结果表明，2014-2020年2个站点O₃-8 h质量浓度变化趋势相反，河东站和河西站气候倾向率分别为0.303μg/（m³·a）和-0.405μg/（m³·a），趋势系数均没有通过信度检验。O₃-8 h质量浓度逐月变化呈“V”型分布，最高值出现在10月；日变化表现为单峰型，峰值出现在15:00左右。平均气温在15～25℃之间，相对湿度为65%～80%，太阳总辐射为14～24 MJ/m²，日照时数为6～10 h/d，受6～12 m/s之间的东北风影响时，三亚市O₃-8 h质量浓度会出现超标。多元回归分析表明，10 m平均风速、相对湿度、日照时数和平均气温是O₃-8 h质量浓度的主控因子。秋季的内陆东北气流和沿海东北气流，春季的沿海东北气流，冬季短距离气流和东北气流影响下会出现三亚市O₃-8 h质量浓度超标，超标率分别为13.61%、2.31%、1.44%、0.95%和2.76%；福建省、江西省和广东省是三亚市O₃污染的主要贡献源区。更多还原

【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 average result） were analyzed using the backward trajectory simulation,cluster analysis,PSCF （potential source analysis function） 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 0.303μg/（m³·a） and-0.405μg/（m³·a）,respectively,which not passed the significance test.The monthly variation of O₃-8 h shows a“V”-shaped distribution,with the maximum 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 between 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-distance air 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.更多还原