摘要
针对2016年12月16~21日华北黄淮及周边地区的重度霾过程开展了诊断分析,发现全球、区域大气环流异常和局地气象条件是此次重度霾形成的重要原因之一。在此次过程中,受重度霾影响的面积为71×10~4 km^2,霾持续时间达到6 d,过程最高小时细颗粒物(PM2.5)浓度超过1100μg/m^3。东大西洋/西俄罗斯和西太平洋波列(中高层)和北极涛动(近地面)均表现为显著的正位相型分布,综合调控了华北黄淮局地的环流场和气象条件,有利于霾的发生。华北、黄淮上空的异常反气旋能够有效抑制垂直运动,减弱水平风速。与之对应,近地面层为明显的弱低压区和偏南暖湿气流。从局地气象条件看,地面小风速、高湿度以及浅薄的边界层是促使本次重度霾发生的重要因子。
The severe haze occurred over North China and Huanghuai area in 16-21 December 2016 was analyzed and the atmospheric circulation anomalies were diagnosed to reveal one of the important causes. The coverage of this severe haze was 71 ×10 4 km2, and the duration was six days. The highest measured hourly PM2.5 concentration was above 1100 μg/m3. The East Atlantic/West Russia and West Pacific teleconnections （mid-upper level） and Arctic Oscillation （near surface） were in their positive phases and affected local atmospheric circulations and meteorological conditions, which were favorable for the occurrence of haze. The anti-cyclone over North China and Huanghuai area effectively confined the vertical motion and weakened the surface wind speed. Meanwhile, there existed an obvious weak low pressure system near the surface with warm and humid southerly winds. From the perspective of local meteorological conditions, the weak surface wind and high humidity condition as well as the shallow boundary layer were most important contributors to the occurrence of the severe haze in 16-21 December 2016.
作者
袁东敏
马小会
YUAN Dongmin;MA Xiaohui(Public Meteorological Service Center, China Meteorological Administration, Beijing 100081;Institute of Urban Meteorology, China MeteorologicalAdministration, Beijing 100089;Environmental Meteorology Forecast Center of Beijing- Tianjin-Hebei, Beijing 100089)
出处
《气候与环境研究》
CSCD
北大核心
2017年第6期757-764,共8页
Climatic and Environmental Research
基金
国家电网公司科技项目52010115002
中国气象局公共气象服务中心业务服务专项基金M2017009
国家自然科学基金青年基金41405136~~
关键词
霾
污染
大气环流
气候变化和变率
Haze, Pollution, Atmospheric circulation, Climate Change and variability
