基于精细化数值模拟的汾渭平原大气自净能力研究  

A study on the atmospheric self-cleaning capacity of Fenwei Plain based on refined numerical simulation

作　　者：张思青 张自银 刘新罡[1] 李晨露 刘亚非 张欢 王正 程强 李峰 ZHANG Siqing;ZHANG Ziyin;LIU Xingang;LI Chenlu;LIU Yafei;ZHANG Huan;WANG Zheng;CHENG Qiang;LI Feng(School of Environment,Beijing Normal University,Beijing 100875;Institute of Urban Meteorology,CMA,Beijing 100089;Yuncheng Environmental Protection Bureau,Yuncheng 044000;Liaocheng Ecological Environment Bureau Dongchangfu District Branch,Liaocheng 252000;Shandong Jining Ecological Environment Monitoring Center,Jining 272000)

机构地区：[1]北京师范大学环境学院,北京100875 [2]北京城市气象研究院,北京100089 [3]运城市环境保护局,运城044000 [4]聊城市生态环境局东昌府区分局,聊城252000 [5]山东省济宁生态环境监测中心,济宁272000

出　　处：《环境科学学报》2023年第7期286-297,共12页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.91544221,41975168);科技部项目(No.2016YFC0202004)。

摘　　要：汾渭平原作为大气污染防控的重点区域之一,精确认识其大气环境自净能力特征对科学制定防控政策具有重要意义.通过WRF模式开展的精细化数值模拟试验,本研究定量化探讨了汾渭平原地区PM_(2.5)的大气自净能力及其时空特征.结果表明,汾渭平原地区行星边界层高度、风速、降水量的时间特征均为白天高夜间低,春夏季最高,冬季最低;在空间上,行星边界层高度呈南低北高,降水量呈南高北低.汾渭平原大气自净能力在空间上整体为南低北高的特征;各城市白天的大气自净能力总体上高于夜晚,15:00为峰值时刻,7:00—8:00为谷值时刻;春夏季大气自净能力明显高于秋冬季.城市大气自净能力与PM2.5浓度呈显著负相关关系.鉴于研究区域内大气自净能力的显著时空差异,错峰错时生产和合理化产业布局将是实现汾渭平原地区经济社会与环境保护协同发展的有效途径.As one of the key areas for air pollution control,it is of great significance to understand the atmospheric self-cleaning capacity on the Fenwei Plain.Based on the refined numerical simulation of WRF model,this study quantitatively characterized the atmospheric PM2.5 self-cleaning capacity and its spatiotemporal variations on the Fenwei Plain.The results revealed that the planetary boundary layer height,wind speed and precipitation were higher in the daytime and lower at night,while they were higher in spring and summer,and lower in winter.The planetary boundary layer height was lower in the south and higher in the north,while precipitation was higher in the south and lower in the north of Fenwei Plain.The atmospheric selfcleaning capacity on the Fenwei Plain was lower in the south and higher in the north.The atmospheric self-cleaning capacity index in the daytime was usually higher than that at night,and the diurnal peak time was 15:00,and the valley time was from 7:00 to 8:00.The atmospheric self-cleaning capacity index in spring and summer were significantly higher than those in autumn and winter.The self-cleaning capacity in urban areas was negatively correlated with PM_(2.5) concentration.In view of the significant spatiotemporal differences in the atmospheric self-cleaning capacity,adjustable production time and rationalization of industrial layout will be effective ways for the coordinated development of economics and environmental protection on the Fenwei Plain.

关 键 词：汾渭平原 WRF模式 大气自净能力 PM2.5 

分 类 号：X513[环境科学与工程—环境工程]