LI Yuan,FENG Xinyuan,MA Bingxia,et al.Characteristics of Cold Fronts in Sichuan Basin and its Influence on Temperature Inversion and Air Pollution[J].Journal of Chengdu University of Information Technology,2023,38(03):340-348.[doi:10.16836/j.cnki.jcuit.2023.03.014]
四川盆地冷锋特征及其对逆温和大气污染的影响
- Title:
- Characteristics of Cold Fronts in Sichuan Basin and its Influence on Temperature Inversion and Air Pollution
- 文章编号:
- 2096-1618(2023)03-0340-09
- Keywords:
- meteorology; cold front; moving path; Sichuan Basin; temperature inversion; air pollution
- 分类号:
- P441
- 文献标志码:
- A
- 摘要:
- 为进一步研究四川盆地冷锋特征及其影响,利用2015-2019年历史天气图、地面和高空气象观测以及大气环境监测数据,对四川盆地冷锋特征及其对逆温和大气污染的影响进行分析和讨论。结果表明,四川盆地冷锋过程年均9.6例,春秋季最多、最强。偏北路径冷锋最多、平均强度最强,春秋季最多; 西北路径冷锋个例数和平均强度次之,夏多冬少; 偏东路径冷锋最少、最弱。冷锋过境时逆温频率降低,过境后回升。冷锋过境对PM2.5、PM10、SO2、NO2、CO以清除为主,对颗粒物的影响高于气态污染物,而O3浓度随冷锋过境有增加趋势,强冷锋清除效果高于一般冷锋。过境时,西北路径冷锋的清除效果最好,PM2.5浓度降低近一半,而偏东路径冷锋清除能力最弱。冷锋过境后,偏北路径冷锋的清除作用依然显著,污染物浓度持续降低。
- Abstract:
- In order to further study the characteristics of cold front and its influence of Sichuan Basin, the historical weather map,surface and upper-air meteorological observations and atmospheric environment monitoring data from 2015 to 2019 are analyzed and discussed on the characteristics of cold front and its influence on temperature inversion and air pollution. The results show that the average number of cold front processes in Sichuan Basin is 9.6 cases annually, with the most and strongest in spring and autumn.The north path has the most cold fronts, the strongest average strength, and the most in spring and autumn; the northwest path has the second number and average intensity, more summer and less winter; the east path has the least and weakest. The cold front transit mainly removes PM2.5, PM10, SO2, NO2, and CO, and the impact on particulate matter is higher than that of gaseous pollutants, while the concentration of O3 increases with the cold front transit, and the removal effect of strong cold front is higher than that of the general cold front. When the cold front passes,the removal effect of the northwest path cold front is the best,and the PM2.5 concentration is reduced by nearly half, the east path cold front clearance ability is the weakest. After the cold front passes through, the removal effect of the cold front in the north path is still significant, and the concentration of pollutants continues to decrease.
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备注/Memo
收稿日期:2022-03-24
基金项目:国家自然科学基金资助项目(41775147、91644226)
通信作者:冯鑫媛.E-mail:fengxy@cuit.edu.cn