2017年初一次四川重污染过程气象条件综合分析  

Comprehensive Analysis of Meteorological Conditions in Heavy Pollution Process in Sichuan in Early 2017

作　　者：邵梦琪 甘维金 向卫国[1] SHAO Meng-qi;GAN Wei-jin;XIANG Wei-guo(College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225

出　　处：《成都信息工程大学学报》2018年第2期212-219,共8页Journal of Chengdu University of Information Technology

基　　金：四川省环境保护科学研究院资助项目(2015H081)

摘　　要：为了更好的了解并改善目前四川盆地地区的空气污染问题,对2016年12月29日至2017年1月9日的一次重污染天气过程进行了综合分析。利用国家环保部空气质量指数资料和常规气象观测资料,对此次污染过程的时间变化、环流形势、气象条件和大气边界层特征进行了分析。根据分析可知,此次重污染过程是多方面因素导致的,因此污染严重且持续时间长。结果表明:此次重污染过程中整个四川盆地都受到了影响,川西平原最重,川南次之;盆地处于槽前西南气流控制,天气形势较差,偶尔有高原短波槽东移,但无低空系统配合,不利于污染物的扩散;地面风速较小,累计降水量较少,没有起到清除作用;逆温层高度低,混合层高度较低,污染期间下沉运动明显,大气层结较稳定,造成垂直方向上污染物无法扩散。In order to better know and improve the current air pollution problems in the Sichuan basin,a heavy pollution weather process from December 29,2016 to January 9,2017 was comprehensively analyzed.Based on the air quality index data and conventional meteorological observation data of the Ministry of Environmental Protection,the temporal variation of pollution status,circulation situation,meteorological condition and atmospheric boundary layer characteristics were discussed.According to the analysis,the heavy pollution process is caused by many factors,so the pollution is serious and will last for a long time.The results showed that： the entire Sichuan Basin have been affected,the most serious polluted area was West Sichuan Plain,and the second most polluted area was southern Sichuan region.About circulation situation,the Sichuan Basin was under the control of the southwest of the airflow and the weather situation was not good.Occasionally the short-wave trough on the plateau moved eastward.But without coordination of low altitude system,it was detrimental to the diffusion of pollutants.During the heavy pollution process,the surface wind speed was small,and the total precipitation in the major cities of the basin was small.It did not play a scavenging role.The inversion layer was very low in the basin.The mixing layer was of lower height.During the pollution period,atmospheric subsidence movement was obvious.The atmosphere was stable,and the pollutants it caused did not spread in the vertical direction.

关 键 词：大气污染 气象要素 四川盆地 环流形势 扩散条件 

分 类 号：P458[天文地球—大气科学及气象学]