主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2023, Vol. 39 ›› Issue (6): 87-95.doi: 10.3969/j.issn.1673-503X.2023.06.011

• 论文 • 上一篇    下一篇

2015年华北地区上甸子大气本底站PM2.5化学组分特征及来源分析

贾小芳1(),李杨1,*(),孙晓晴1,董璠2   

  1. 1. 中国气象局气象探测中心,北京 100081
    2. 中国气象局京津冀环境气象预报预警中心,北京 100089
  • 收稿日期:2022-06-06 出版日期:2023-12-28 发布日期:2024-01-27
  • 通讯作者: 李杨 E-mail:jiaxf@cma.gov.cn;liyang@cma.gov.cn
  • 作者简介:贾小芳, 女, 1986年生, 高级工程师, 主要从事大气环境方面研究, E-mail: jiaxf@cma.gov.cn
  • 基金资助:
    国家自然科学基金面上项目(42175189)

Characteristics and source analysis of PM2.5 chemical components at the Shangdianzi regional background station in North China in 2015

Xiaofang JIA1(),Yang LI1,*(),Xiaoqing SUN1,Fan DONG2   

  1. 1. Meteorological Observation Centre, China Meteorological Administration, Beijing 100081, China
    2. Environmental Meteorological Forecast Center of Beijing-Tianjin-Hebei, China Meteorological Administration, Beijing 100089, China
  • Received:2022-06-06 Online:2023-12-28 Published:2024-01-27
  • Contact: Yang LI E-mail:jiaxf@cma.gov.cn;liyang@cma.gov.cn

摘要:

根据2015年上甸子区域大气本底站PM2.5样品采集数据,分析PM2.5质量浓度及其化学组分变化特征,应用质量闭合、后向轨迹、潜在源等方法分析其来源。结果表明:2015年上甸子站PM2.5质量浓度年平均值为44.9 μg·m-3,春季、夏季、秋季、冬季均值分别为58.1、30.9、39.7、51.3 μg·m-3,与2009—2010年相比分别降低了33%、56%、46%、9%。SO42-、NO3-和NH4+质量浓度年平均值分别为8.5±9.2、6.4±8.3、3.9±4.7 μg·m-3,有机碳、元素碳浓度年平均值分别为8.9±6.3 μg·m-3、1.6±1.2 μg·m-3。NO3-与SO42-浓度日均值的比值为0.82,大于2004年、2012年和2013年的观测结果。PM2.5的主要组分为土壤、有机物、硫酸盐、硝酸盐,占比分别为34%、23%、22%、15%。与2004年相比,上甸子站PM2.5中硫酸盐占比有所下降,土壤组分占比提高。上甸子站PM2.5主要源自站点南部及西北部、北部等,河北省、山东省等地的区域传输对上甸子站高浓度PM2.5存在较大影响。

关键词: 气溶胶, 化学组分, 后向轨迹

Abstract:

Based on the PM2.5 sample data collected from Shangdianzi regional atmospheric background station in 2015, the variation characteristics of PM2.5 mass concentration and its chemical components were analyzed, and its sources were traced by mass closure, backward trajectory, and potential source contribution methods. The results show that the annual average PM2.5 mass concentration at Shangdianzi station in 2015 was 44.9 μg·m-3, with average concentrations of 58.1 μg·m-3 in spring, 30.9 μg·m-3 in summer, 39.7 μg·m-3 in autumn, and 51.3 μg·m-3 in winter. Compared with 2009 to 2010, they decreased by 33%, 56%, 46%, and 9% respectively. The annual average mass concentrations of SO42-, NO3- and NH4+ are 8.5±9.2, 6.4±8.3, and 3.9±4.7 μg·m-3, respectively. The average annual concentrations of organic carbon and elemental carbon are 8.9±6.3 μg·m-3 and 1.6±1.2 μg·m-3, respectively. The daily average concentration ratio of NO3- to SO42- is 0.82, which is higher than the observed results in 2004, 2012 and 2013. The main components of PM2.5 are soil, organic matter, sulfates, and nitrates, accounting for 34%, 23%, 22%, and 15%, respectively. Compared with 2004, the proportion of sulfate in PM2.5 at Shangdianzi station has decreased, while the proportion of soil components has increased. The PM2.5 at Shangdianzi station primarily originates from the southern, northwestern, and northern of the station, and regional transmission from Hebei and Shandong provinces has a great impact on the high concentration of PM2.5 in Shangdianzi Station.

Key words: Aerosol, Chemical composition, Backward trajectory

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