| 河南省2019—2021年城市大气降尘污染特征与影响因素识别 |
| Characteristics and Influence Factors of Urban Dust-Fall Pollution in Henan Province from 2019 to 2021 |
| 投稿时间：2023-02-07 修订日期：2023-07-04 |
| DOI：10.19316/j.issn.1002-6002.2024.04.06 |
| 中文关键词: 河南省 大气降尘 污染特征 影响因素 |
| 英文关键词:Henan Province dust-fall pollution characteristics influence factor |
| 基金项目:河南省创新研发专项(201400210700) |
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| 中文摘要: |
| 基于2019—2021年河南省城市大气降尘监测数据,分析了城市大气降尘污染变化,并利用趋势分析和相关系数法,识别了影响河南省城市大气降尘量的主要因素。结果表明,研究期间,全省年均城市大气降尘量的增幅为21%，78%的地市的大气降尘量呈上升态势。城市大气降尘量高值主要集中出现在多沙尘、少雨且多大风的3—6月,2021年还出现在了多强降水的7—9月。城市大气降尘量的增加受自然因素和人为因素共同作用:一方面,强降水的冲刷作用导致2021年7—9月城市大气降尘量高于历史同期;另一方面,河南省城市扬尘污染问题依旧突出,2021年城市大气PM10和PM2.5浓度比值比2019年增加了8%。因此,提升城市扬尘管理水平是减少城市大气降尘污染的重要途径之一。 |
| 英文摘要: |
| Based on the monitoring data of urban atmospheric dust in Henan Province from 2019 to 2021,this paper analyzes the changes in urban atmospheric dust pollution,and uses trend analysis and correlation coefficient method to identify the main factors affecting urban atmospheric dust in Henan Province. The results showed that during the study period,the annual increase in urban atmospheric dust precipitation in the province was 21%, and 78% of cities showed an upward trend. The high values of urban atmospheric dust fall mainly occurred from March to June,when there were mostly sandy and dusty days with little rain and a lot of strong winds. The high value of urban atmospheric dust in 2021 also occurred during the period of heavy rainfall from July to September. The increase in urban atmospheric dust deposition was influenced by both natural and human factors. On the one hand,the scouring effect of heavy rainfall resulted in higher urban atmospheric dust deposition from July to September 2021 compared to the same period in history. On the other hand,the problem of dust pollution was still prominent in Henan Province, and the ratio of PM10 concentration to PM2.5 concentration in 2021 increased by 8% compared to 2019. Therefore,improving the level of urban dust management is one of the important ways to reduce urban atmospheric dust-fall. |
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