| 摘要: |
| 基于周口市2021年冬防期间（2021年10月1日—2022年3月31日）4个国控站点的在线小时数据和日均数据，利用统计和相关性分析等方法，研究了冬防期间污染要素的时空变化特征及其与主要气象因子之间的相关性。结果表明，周口市2021冬防期间空气质量达标率为64.8%，主要污染物为细颗粒物（PM2.5），其中1月的大气污染最严重，ρ（PM2.5）小时平均值为120 μg/m3，可吸入颗粒物（PM10）质量浓度小时最高值出现在3月沙尘期间，为591 μg/m3。各污染要素的变化整体趋同，但多个站点的ρ（SO2）和ρ（NO2）频繁出现短时高值，这一现象可能与局地细颗粒物污染相关，在后续大气污染防控中需引起重点关注。市运管处站的NO2和SO2质量浓度整体偏高，需关注周边机动车相关的颗粒物排放。此外，西北风和东风对于PM2.5污染传输的影响较大，气象不利条件下，需要加强管控，以有效保证空气质量达标。 |
| 关键词: 细颗粒物 污染特征 相关性 污染防控 |
| DOI：10.3969/j.issn.1674-6732..2023.06.015 |
| 分类号:X51 |
| 基金项目: |
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| Characteristics of Air Pollution in Zhoukou City and Solutions to Pollution Prevention and Control-Taking Prevention and Control in 2021 Winter as an Example |
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LU Feng， WANG Keyong， SHEN Zhongxin， LIU Yongliang， DONG Zheng
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Zhoukou Eco environmental Monitoring Center， Zhoukou， Henan 466000， China
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| Abstract: |
| Based on the ambient air quality monitoring data from 4 state control stations from Zhoukou in Henan province during the winter pollution prevention and control period in 2021 (2021/10/01—2022/03/31). The temporal and spatial variation characteristics of pollution factors and their correlation with major meteorological factors during winter prevention were studied with the online hourly and daily data by using statistical and correlation analysis methods. The results showed that the air quality compliance rate in Zhoukou during the 2021 winter period was 64.8% while the main pollutant was PM2.5.The most serious pollution occurred in January with the hourly concentration of PM2.5 of 120 μg/m3， and the highest concentration of PM10， which was 591 μg/m3，occurred during the sandstorm period in March. The concentrations of SO2 and NO2 at 4 sites showed short term high values frequently， which may be related to local fine particle pollution. The concentrations of SO2 and NO2 at Shiyunguanchu Station was relatively high， which should be attributed to the particulate matter emissions from vehicles surrounded . Furthermore， northwest and east wind directions had significant impact on the regional transmission of PM2.5 pollution.So it’s necessary to strengthen controll to ensure that the air quality complies with the national standard levels espically during unfavorable meteorological conditions. |
| Key words: PM2.5 Air pollution characteristics Correlation Pollution prevention and control |
