摘要
以华北地区为研究区域,利用地面监测数据、高空观测资料、NCEP FNL资料及HYSPLIT后向轨迹模式,对2016年12月26日至2017年1月9日该地区的雾霾天气过程进行综合分析。结果表明,雾霾期间高空以纬向环流为主,冷空气势力偏弱,主要受高压、弱高压或均压场控制,有利于华北地区静稳天气形成。同时,雾霾期间边界层平均高度约600～900 m,污染物浓度与边界层高度呈负相关,且污染物浓度变化较边界层高度变化存在滞后现象。逆温层的长期存在,不利于污染物垂直扩散,能见度一直维持在5 km以下。后向轨迹集合模拟与聚类分析表明,以北京地区为核心的华北地区雾霾天气期间,外来污染物中,80%来自西北方气团,20%来自河北西南地区气团。
Taking North China as study area, the fog and haze weather process from December 26, 2016 to January 9, 2017 was comprehensively analyzed by using ground observation data, high altitude observation data, NCEP FNL data and HYSPLIT backward trajectory model. The results show that during the fog and haze process, the upper air is dominated by zonal circulation and the cold air is weak. North China region is mainly controlled by high pressure, weak high pressure or uniform pressure field, which is contributed to formation of the static stability weather. At the same time, the mean height of planetary boundary layer is 600 900 m during the pollution period, and the pollution concentrations is negatively correlated with the height of planetary boundary layer, and the change of pollution concentrations is lagging behind the change of boundary layer height. The long time existence of the inversion layer is not conducive to the vertical diffusion of pollutants, leading to the visibility being maintained under 5 km. The ensemble simulation and clustering analysis using backward trajectory show that during the fog and haze weather in North China,80% of the transported pollutants is coming from the northwestern air mass and 20% from the southwestern Hebei.
作者
滑申冰
师华定
王堃
高佳佳
Hua Shenbing;Shi Huading;Wang Kun;Gao Jiajia(State Key Laboratory of Operation and Control of Renewable Energy ＆ Storage Systems,China Electric Power Research Institute,Beijing 100192,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Beijing Municipal Institute of Labour Protection,Beijing 100054,China)
出处
《气象与环境科学》
2018年第4期47-53,共7页
Meteorological and Environmental Sciences
基金
中国环境科学研究院中央级公益性科研院所基本科研业务专项(2016YSKY-003)
环保公益性行业科研专项(201409027
201509001)
国家电网公司总部科技项目(5442NY150005)
国家自然科学基金项目(21607008)资助
关键词
大气环流
边界层高度
逆温层
路径模拟
聚类分析
atmospheric circulation
boundary layer height
inversion layer
path simulation
cluster analysis
