珠江三角洲城市群灰霾天气主要污染物的数值研究  

Numerical Experiment Research on Air Pollutants During Atmospheric Haze over the Multi-cities of Pearl River Delta Region

作　　者：陈训来[1] 冯业荣[2] 王安宇[1] 李江南[1] 范绍佳[1] 林建恒[3] 冯瑞权[3] 

机构地区：[1]中山大学季风与环境研究中心/大气科学系,广东广州510275 [2]广州中心气象台,广东广州510080 [3]澳门地球物理暨气象局

出　　处：《中山大学学报（自然科学版）》2007年第4期103-107,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家"973"计划资助项目(2002CB410801);广西科学攻关基金资助项目(0322022-4)

摘　　要：主要利用美国第三代空气质量模式系统Models-3(MM5/SMOKE/CMAQ),设计三重嵌套网格对2004年9月26-30日珠江三角洲城市群一次灰霾天气过程进行数值研究,通过对主要大气污染物如PM10、CO、SO2和NOx的模式结果与观测对比分析表明,模式较好地模拟出了大气污染物的变化趋势,与观测结果比较一致,再现了污染物浓度呈周期性日变化的重要特征。结果还表明,在这次灰霾天气过程中珠江三角洲城市群大气污染物的水平分布具有区域性,存在3个高值中心,污染物的高值中心对应着大城市。污染物主要积聚在大气边界层内,形成近地面高浓度,这是造成此次灰霾天气的直接原因。　In this paper,the Models-3 modeling system was used to study the distribution of air pollutants during a haze event over the multi-cities of Pearl River Delta（PRD） Region during the period of September 26 to September 30,2004.The modeling system included air pollutant emission model SMOKE,meteorological data from MM5,and Community Multi-scale Air Quality（CMAQ）（Version 4.5）,a 3-D chemistry transport air quality model.A 3-level-nested grid domain with spatial resolutions of 36 km,12 km and 4 km was designed for the study region.The comparisons of observed and simulated PM10、CO、SO2 and NOx indicated that the modeling system was able to simulate variations of pollutants over the PRD region well.Moreover,the model results showed that the spatial distribution of air pollutants had close relation to the source emission and there were three peaks over the PRD region.The air pollutants were mostly accumulated in the planetary boundary layer（PBL） and caused the formation of high concentrations at the surface.

关 键 词：城市群 灰霾 大气污染物 珠江三角洲 

分 类 号：X131.1[环境科学与工程—环境科学]