知方号

知方号

库尔勒市大气颗粒物浓度特征及来源<库尔勒市所处地貌类型>

库尔勒市大气颗粒物浓度特征及来源

Based on the analysis of the pollution characteristics in the hourly data (January 2015-December 2023) of atmospheric particulate matter in Korla of the northeastern Tarim Basin, the backward trajectory model of HYSPLIT, cluster analysis, potential source contribution factor (PSCF), and concentration weight trajectory (CWT) were used to analyze the main transport pathways and potential source regions of PM10, and also revealed the potential source distributions and contribution levels of PM10 in different seasons in Korla during the study period. The results showed that the annual average values of PM2.5 and PM10 in 2015-2023 in Korla were 47.7±20.0 μg·m-3 and 162.2±102.4 μg·m-3, respectively, exceeding the national annual average secondary concentration limits by 132% and 36.3%. The PM10 was the main pollutant. The PM2.5/PM10 value was the lowest in spring (0.29) and the highest in winter (0.47), and the overall PM2.5/PM10 value showed a decreasing trend. The airflow transport path mainly came from the short west wind flow, followed by the east irrigation airflow from Turpan Basin. The Tarim Basin was the main contributing source area of particulate matter in Korla throughout the year, and the contribution level of particulate matter concentration was higher in spring and winter, and lower in summer and autumn. It is important for Korla to prevent the impact of sand and dust aerosols from the Tarim Basin on air quality, followed by the east-flooding airflow from the Turpan Basin and the west-flooding airflow from Central Asia.

Keywords:atmospheric particulate matter;cluster analysis;potential source contribution factor;concentration-weighted trajectory;Korla

版权声明:本文内容由互联网用户自发贡献,该文观点仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容, 请发送邮件至lizi9903@foxmail.com举报,一经查实,本站将立刻删除。