2013年南昌市区PM2.5的浓度水平及时空分布特征与来源

被引：28

作者：

赵阳 ^{[1
,2
]}

胡恭任 ^{[1
]}

于瑞莲 ^{[1
]}

陆成伟 ^{[3
]}

樊孝俊 ^{[4
]}

黄灵光 ^{[5
]}

刘海婷 ^{[5
]}

机构：

[1] 华侨大学化工学院

[2] 南昌市环境保护局

[3] 成都市环境保护科学研究院

[4] 南昌市环境监测站

[5] 江西省山江湖开发治理委员会办公室

来源：

环境科学研究 | 2017年 / 30卷 / 06期

关键词：

PM2.5; 时空特征; 后向轨迹; 潜在源贡献因子; 浓度权重轨迹分析;

D O I：

10.13198/j.issn.1001-6929.2017.02.19

中图分类号：

X513 [粒状污染物];

学科分类号：

摘要：

对2013年南昌市区9个自动空气质量监测点的ρ(PM2.5)数据进行分析,探讨了PM2.5浓度水平及时空分布特征,并采用轨迹聚类、PSCF（潜在源贡献因子）、CWT（浓度权重轨迹分析）进行了大气PM2.5的来源分析.结果显示:2013年南昌市区ρ(PM2.5)年均值为69.1μg/m3,超过GB 3095—2012《环境空气质量标准》二级标准限值（35μg/m3）的97%;ρ(PM2.5)昼夜变化呈双峰型分布,峰值位于09:00—11:00和20:00—22:00;月际变化呈两边高、中间低的"V"型趋势;ρ(PM2.5)有明显的季节性变化特征,由高到低依次为冬季、春季、秋季和夏季;ρ(PM2.5)空间分布呈由东南至西北递减的分布特征.气流轨迹聚类结果表明,南昌市气流输送季节性变化特征明显,夏季来自南方或东南方向的气流比例高达65.6%,而在另外三个季节,东北和偏北方向的气流分别占62.0%（冬）、59.6%（春）、54.7%（秋）,对南昌市ρ(PM2.5)影响较大;夏季南方或东南方向的气流所占比例较高,为65.6%;PM2.5的PSCF和CWT的高值主要集中在南昌本地和邻近的浙江省及福建省北部地区,但周边的河南南部、江苏中部也是南昌市PM2.5的潜在来源地.

引用

页码：854 / 863

页数：10

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