【摘要】 为研究山地地形对城市大气环境状况的影响,特选取江西省吉安市作为典型研究对象,统计分析2016年1月1日-2017年12月31日吉安市4个国控站PM_2.5、PM₁₀、SO₂、NO₂、CO和O₃逐时资料与吉水、吉安县、泰和及峡江站同期气象数据,并结合OMI遥感数据进行分析,同时对个例进行深入诊断分析。结果表明:相比2016年,2017年PM_2.5、PM₁₀、SO₂、O₃年均浓度分别上升15.4%、13.9%、7.3%、21.9%,NO₂与CO分别下降6.3%、22.2%,颗粒物与臭氧复合型污染日趋严重。统计分析表明,吉安市山谷风日共计241天,占总天数33.0%,山谷风导致该城市重污染日,山谷风日吉安市SO₂及NO₂浓度变化与城区以外的电厂燃煤排放有关。从污染个例分析入手,进一步验证了山谷风日市区SO₂日变化与城区以外的电厂燃煤排放有关。更多还原

【Abstract】 To understand the mountain terrain effects on urban air pollution status,select Ja’an city of Jiangxi province as a typical study,the data of air pollutions PM_2.5、PM₁₀、SO₂、NO₂、CO and O₃ in 4 state controlling air monitoring stations of Ja’an city from January 1,2016 to December 31,2017 and meteorological data of Jishui、Ji’an country、Taihe and Xiajiang stations in the same period were statically,conjoint analysis OMI data meanwhile individual case are deep analysis. The results indicated that O₃ generation in Ji’an city was limited by NOx from 2014 to 2016,compared with 2016, 2017 annual PM_2.5 and PM₁₀,SO₂,O₃ concentration rose by an annual rate of 15.4%, 13.9%, 7.3%,21.9%,NO₂ and CO fell 6.3% and 22.2% respectively, particulate matter and ozone compound pollution is increasingly serious. Due to the energy structure of Ja’an city,coal-fired pollution is still prominent. From the analysis of individual cases of pollution,found that the significantly higher SO₂ concentration in Ja’an downtown was related to the mountain valley wind oscillation. Statistical analyses suggested mountain valley wind caused heavy pollution days, mountain valley wind totaled 241 d,accounting for 33.0% of total days,the variation of SO₂ and NO₂ concentration at Ji’an city is directly related to the coal burning emission from power plants outside the urban area. From pollution case analysis,further prove the city daily variation of SO₂ is associated with the coal burning emission from power plants outside the urban area.更多还原