2016年12月16～21日重度霾过程及大气环流异常

发布时间：2018-06-14 08:33

本文选题：霾 + 污染　；参考：《气候与环境研究》2017年06期

【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。
[Abstract]:Based on the diagnostic analysis of the heavy haze process in Huanghuai and its surrounding areas in North China from 16 to 21 December 2016, it is found that the regional atmospheric circulation anomaly and local meteorological conditions are one of the important reasons for the formation of the heavy haze. In this process, the area affected by heavy haze was 71 脳 10 ~ (10) ~ 4 km ~ (-2), the duration of haze was 6 days, and the concentration of PM2.5) was over 1100 渭 g / m ~ (2). The East Atlantic / West Russia and the Western Pacific wave trains (middle and high levels) and the Arctic Oscillation (near the surface) show significant positive phase distributions, which comprehensively regulate the circulation field and meteorological conditions in Huanghuai area of North China, which is conducive to haze occurrence. The anomalous anticyclones over Huanghuai and Huanghuai in North China can effectively suppress vertical motion and weaken horizontal wind speed. Corresponding to this, the near surface layer is a weak low pressure area and a warm and wet air flow to the south. In terms of local meteorological conditions, small surface wind speed, high humidity and shallow boundary layer are the important factors to promote the occurrence of heavy haze.
【作者单位】：中国气象局公共气象服务中心;中国气象局北京城市气象研究所;中国气象局京津冀环境气象预报预警中心;
【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~~
【分类号】：P434;X513

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