摘要
利用MICAPS数据、环境空气质量监测站点小时数据和CLDAS2.0实时数据产品,对2020年12月20—28日和2019年12月27日—2020年1月4日四川盆地出现的2次区域污染天气过程进行分析。结果表明,四川盆地2次区域污染过程的污染演变路径都是盆地东北→盆地西北部→盆地南部→整个盆地,2次污染过程持续时间和达到区域污染的天数均相同,但2020年12月20—28日污染程度更严重。较高的相对湿度、持续的小风速和低混合层高度是2020年污染过程比2019年污染过程更严重的主要原因。
Two regional pollution weather processes occurred in the Sichuan Basin from December 20-28,2020 and December 27th,2019 to January 4 th,2020 were analyzed using MICAPS data,hourly data from environmental air quality monitoring stations,and CLDAS2.0 real-time data products.The results indicate that the pollution evolution characteristics of the two regional pollution processes in the Sichuan Basin were from the northeast of the basin to the northwest of the basin,to the south of the basin,and to the entire basin.The duration of the two pollution processes and the number of days reaching regional pollution were the same,but the pollution level was more severe from December 20-28,2020.The high relative humidity,sustained low wind speeds,and low mixed layer height were the main reasons for the more severe pollution process in 2020 compared to 2019.
作者
杜筱筱
冯勇
成翔
赵晓莉
Du Xiao-xiao(Sichuan Meteorological Disaster Prevention Technology Center,Chengdu,Sichuan 610072)
出处
《农业灾害研究》
2023年第10期282-286,共5页
Journal of Agricultural Catastrophology
基金
高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJ-QN2020047、SCQXKJZD202102-3)。
关键词
四川盆地
大气污染
污染特征
环流形势
Sichuan Basin
Air pollution
Pollution characteristics
Circulation situation
