LI Simeng,LIN Shiying,CHEN Nanxi,et al.Research of the Influence of Inversion Layer on Haze over Chengdu[J].Journal of Chengdu University of Information Technology,2020,35(01):79-86.[doi:10.16836/j.cnki.jcuit.2020.01.011]
逆温层对成都地区雾霾影响的研究
- Title:
- Research of the Influence of Inversion Layer on Haze over Chengdu
- 文章编号:
- 2096-1618(2020)01-0079-08
- Keywords:
- atmospheric physics; meteorology and pollution; Chengdu; winter and spring; temperature inversion
- 分类号:
- P423.6
- 文献标志码:
- A
- 摘要:
- 为探究成都地区逆温对空气污染的影响,选取2014年12月-2018年5月冬春季成都温江站探空、地面风速、相对湿度和成都市空气质量指数、PM2.5浓度等数据,利用统计分析等方法,同时分析了2017年12月16日08时-2018年1月2日20时的持续逆温过程。结果表明:(1)成都冬春季出现污染的频率约达42%,PM2.5浓度超标约占40.28%,冬季雾霾更严重,由冬到春浓度逐渐下降。(2)逆温主要出现在冬季,逆温出现频率分别为19.5%,18.5%和18.5%。(3)逆温层数增加,雾霾加重,无逆温时PM2.5平均浓度为108 μg/m3; 层数为1、2时,PM2.5平均浓度为119 μg/m3、127 μg/m3。(4)贴地逆温出现频率最高,底高主要在540～560 gpm,厚度在0～100 gpm的约占47%; 当逆温持续13个时次以上,污染出现频率超过80%。为成都空气污染治理提供理论依据。
- Abstract:
- To probe the influence of temperature inversion on air pollutionin Chengdu region,this paper applies statistical analysis to analyze the sounding data, surface wind speed, relative humidity, air quality index and PM2.5 from December 2014 to May 2018 in winter and spring of Chengdu. In addition, a process of the continuous thermal inversion from 8:00 on December 16, 2017 to 20:00 on January 2, 2018 was analyzed.The results show that:(1)The frequency of pollution is about 42% in winter and spring over Chengdu,and the days with excessive PM2.5 concentration account for about 40.28%.It has a decreased trend from winter to spring, while the haze is more serious during winter.(2)The frequency of inversion occurrence shows 19.5%,18.5% and 18.5% for winter months.(3)As the number of inversion increases, the haze gradually increases.The average concentration of PM2.5 is 108 μg/m3 when there is no inversion.When the number of the inversion is 1 and 2,the average concentration of PM2.5 is 119 μg/m3,127 μg/m3, respectively.(4)Frequency of the near-surface inversion occurrence is the high estits base heights are mainly 540～560 gpm and the amount of the inversion thicknesses which are 0～100 gpm are about 47%,When the process of the temperature inversion lasts more than 13 time level,thefrequency of air pollution occurrence can be more than 80%.This paper can provide theoretical basis for air pollution control in Chengdu.
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备注/Memo
收稿日期:2019-06-19基金项目:国家自然科学基金资助项目(41875169); 国家重点研发计划资助项目(2018YFC1505702); 贵州省科技计划资助项目(黔科合支撑[2019]2387号); 四川省教育厅资助项目(16CZ0021)