王海波,杨婷,王自发,何立涛,崔延斌,耿伟,朱立敏,黄向锋,王俊仁,孔磊.“2+26”城市2017年冬防减排效果及其潜在原因分析——以衡水市为例[J].环境科学学报,2019,39(11):3639-3647
“2+26”城市2017年冬防减排效果及其潜在原因分析——以衡水市为例
- Analysis of the effect of winter air pollution prevention and control in the “2+26” Cities in 2017 and its potential reasons: Taking Hengshui City as an example
- 基金项目：大气重污染成因与治理攻关项目（No.DQGG0209，DQGG0107，DQGG0304）；中国科学院战略性先导科技专项（A类）（No.XDA19040203）
- 王海波
- 1. 中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室, 北京 100029;2. 中国科学院大学, 北京 100049
- 杨婷
- 中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室, 北京 100029
- 王自发
- 中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室, 北京 100029
- 黄向锋
- 中科弘清(北京)科技有限公司, 北京 100107
- 王俊仁
- 中科弘清(北京)科技有限公司, 北京 100107
- 孔磊
- 1. 中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室, 北京 100029;2. 中国科学院大学, 北京 100049
- 摘要：近年来我国大气重污染频发，严重影响民生，其中以京津冀最为严重.2017年"总理基金"启动，同年冬防效果显著.衡水市作为"2+26"城市之一，空气质量排名常年处于倒数十名之内.经过2017年的冬防，空气质量明显改善，衡水市大气污染的改善在"2+26"城市中很具有代表性.本文以衡水作为切入点，利用后向轨迹和浓度权重轨迹分析（CWT）探讨了2017年衡水冬防效果及潜在源区变化，分别从气象轨迹和本地排放初探了潜在原因.结果表明，2017年冬防效果显著，PM2.5浓度降低33%，优良天数增加32 d，重污染天数减少22 d.PM10浓度降低41%，优良天数增加40 d.2017年冬季PM2.5潜在源区由2016年同期衡水北部及以北地区向衡水南部及以南地区转移.PM10潜在源分布变化与PM2.5相似.两年气象条件的对比结果表明，气象变化较小，对潜在源分布影响不大，本地排放是潜在源区分布变化的主要原因，其中衡水北部工业锅炉和扬尘减排量显著高于衡水南部.研究表明，2017年衡水冬防效果显著，相比于气象条件，本地排放对大气颗粒污染及来源影响更大，本研究可为"2+26"城市大气颗粒污染研究提供参考.
- Abstract：In recent years, China's heavy atmospheric pollution incidents have occurred frequently; seriously affecting people's livelihood, and the pollution in Beijing-Tianjin-Hebei region is the most serious. In 2017, the "Prime Minister Fund" was launched, and the effect of winter air pollution prevention and control was remarkable in the same year. As one of the "2+26" cities, Hengshui City ranks in the bottom ten of the air quality rankings and rises significantly in the winter of 2017 and is utterly representative. In this paper, we use the backward trajectory model and Concentration Weighted Trajectory (CWT) to explore the effects of air pollution prevention and control in Hengshui City in the winter of 2017, and explore the potential causes from meteorological trajectories and local emissions. The result indicated that the effect of air pollution prevention and control in the winter of 2017 is utterly remarkably. The PM2.5 concentration decreased by 33%, the number of excellent and good days increased by 32 days, and the number of heavy and serious pollution days decreased by 22 days. The PM10 concentration decreased by 41% and the number of excellent and good days increased by 40 days. In the winter of 2017, the potential source areas of PM2.5 were transferred from the north and north of Hengshui City to the south and south of Hengshui, and the number of source areas increased. The potential source distribution of PM10 is similar to that of PM2.5. The change in meteorological trajectory is small and has little effect on the distribution of potential sources. The number of trajectory nodes in the potential source area is similar, ranging from 20 to 80, and the spatial distribution of the number of trajectory nodes is relatively high which was 0.55 Local emissions are the main reason for the change in the distribution of potential source areas. The emission reduction of industrial boilers and dust in northern Hengshui is utterly higher than that in Hengshui. Studies have shown that in 2017, the effect of air pollution prevention and control in Hengshui City is remarkable. Compared to meteorological trajectories, local pollution emissions have a greater impact on atmospheric particulate matter pollution and its sources. This study can provide reference for the study of "2+26" cities' atmospheric particulate pollution.
