ZHANG Xiao,SUN Yang,HAN Lin,et al.Analysis on Air Pollution Status and Cause of Typical Mountain Basinterrain[J].Journal of Chengdu University of Information Technology,2020,35(02):203-213.[doi:10.16836/j.cnki.jcuit.2020.02.012]
典型山地地形城市大气环境状况与成因分析
- Title:
- Analysis on Air Pollution Status and Cause of Typical Mountain Basinterrain
- 文章编号:
- 2096-1618(2020)02-0203-11
- Keywords:
- atmospheric chemistry; atmospheric physics and atmospheric environment; air pollution status; mountain valley wind; coal combustion
- 分类号:
- P426.6
- 文献标志码:
- A
- 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PM2.5、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PM2.5、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。
- 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 PM2.5、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 PM2.5 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 241d,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.
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参考文献[7,17]进行对比后发现,基于Z指数反映的四川旱涝时空变化特征整体上与实际情况相吻合,能大致反映出四川旱涝年际的时空分布和变化情况,但在分季节分析时,存在例如对特大旱涝出现频次统计、雨涝和干旱频次空间分布出现冬季过于偏高,以及川西北高原区雨涝频次偏高,而东部盆地干旱频次偏低的差异。由于四川省地形条件差异悬殊,气候类型多样,而旱涝是某地区水分的缺余,其不仅与降水量有关,还与温度,蒸发量、地形、大气环流等因素有关,因此如仅用基于降水量数据的Z指数进行研究势必会有偏差,而偏差的程度有多少,基于不同地形区的偏差是否显著,针对整个四川省和不同的地形区其适用性有多高,以及对Z指数的后续改进等问题还有待更进一步深入和细致的后续考证和探讨。
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备注/Memo
收稿日期:2019-04-26 基金项目:国家自然科学基金资助项目(41505112); 天津市科技计划城市合作资助项目(15YFYSSF00030); 四川省教育厅资助项目(15ZA0191)