西北地质2024，Vol.57Issue(4)：285-296,12.DOI:10.12401/j.nwg.2023184
青藏高原东北部地区城市PM2.5和PM10时空分布特征及气象因素的影响
Spatial-Temporal Distribution Characteristics of PM2.5 and PM10 in the Northeast Tibetan Plateau and the Influence of Meteorological Factors
摘要
Abstract
With the rapid development of industrialization,the problem of air pollution can not be ignored.As an important ecological security strategic area in China,the Northeast Tibetan Plateau had prominent particulate pollution caused by soil desertification.Based on the monthly concentrations of inhalable particulate matter(PM10)and fine particulate matter(PM2.5)in 8 cities(prefectures)from 2015 to 2019 and the meteorological data,this study analyzed the spatial-temporal distribution characteristics of PM2.5 and PM10,the relationships between them and meteorological factors(precipitation,temperature and wind speed)and the degree of influence of me-teorological factors.The results showed that:①Xining city,Haidong city and Huangnan prefecture,which were densely populated and economically developed in the east of Qinghai province,had higher PM2.5 and PM10 con-centrations,with an average level of 44.2 µg/m3(99.1 µg/m3)、44.7 µg/m3(99.7 µg/m3)and 36.5 µg/m3(72.2 µg/m3)respectively.In terms of time distribution,the concentration of particulate matter in each region showed a downward trend year by year.The spatial distribution showed that PM2.5 gradually increased from the west to the east,and PM10 was high in the east and low in the west.② The peak values of temperature and pre-cipitation appeared in summer,showing a"Λ"distribution law.While the monthly concentration changes of PM2.5 and PM10 in various regions showed a"V"distribution law.The particle concentration in non-heating sea-son was the lowest and that in heating season was the highest.③ Among the effects of various meteorological factors,the concentrations of PM2.5 and PM10 were strongly or moderately negatively correlated with precipita-tion and temperature,and were negatively affected by temperature.The concentration of particulate matter was negatively correlated with wind speed.The concentration of PM2.5 was negatively affected by wind speed,while the concentration of PM10 was significantly positively affected by wind speed,indicating that wind-induced dust had a prominent contribution to air pollution,but the action mechanism between wind speed and pollutant con-centration was complex.The results of this study could provide reference and theoretical basis for the improve-ment and prediction of air quality in typical regions.关键词
PM2.5/PM10/空气污染/气象因素/成因分析/青藏高原东北部Key words
PM2.5/PM10/air pollution/meteorological factors/cause analysis/Northeast Tibetan Plateau分类
天文与地球科学引用本文复制引用
梁明武,李慧婷,李魏龙,贾晓丹,汪铭媛,冯朝晖..青藏高原东北部地区城市PM2.5和PM10时空分布特征及气象因素的影响[J].西北地质,2024,57(4):285-296,12.基金项目
青海省重点研发与转化计划项目"三源区流域水资源对气候变化的响应及模拟预测研究"(2023-QY-205)资助成果. （2023-QY-205）
