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| 金昌市不同季节大气颗粒物的传输路径和潜在源分析 |
| Transport Pathways and Potential Sources of Atmospheric Particulates in Different Seasons in Jinchang |
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| DOI： |
| 中文关键词: 大气颗粒物 污染特征 后向轨迹 传输路径 潜在源区 金昌 |
| 英文关键词: Atmospheric particulates Pollution characteristic Backward trajectory Transport pathway Potential source region Jinchang |
| 基金项目:国家重点研发计划基金资助项目（2016YFC0206201） |
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| 中文摘要: |
| 选取金昌市2019年3月—2020年2月PM2.5和PM10逐小时观测数据，分析该市颗粒物污染水平的季节差异，并利用HYSPLIT后向轨迹模式和GDAS气象数据，分析不同气流轨迹对金昌市颗粒物浓度的影响及不同季节颗粒物的潜在污染来源。结果表明，2019年金昌市冬季PM2.5污染最严重，春季PM10污染严重；春、秋季PM10污染程度最高的气流轨迹主要来自西北的长距离输送，而夏、秋、冬季来自周边的短距离气流PM2.5污染程度较高；春季PM2.5贡献源区主要位于新疆东部和俄罗斯南部，秋季主要位于甘肃东南部和阿拉善盟，夏、冬季主要位于青海中西部、西藏北部和新疆西部。 |
| 英文摘要: |
| PM2.5 and PM10 hourly observation data in Jinchang from March 2019 to February 2020 were selected to analyze the seasonal difference of PM pollution level, the impact of different airflow trajectories on PM concentration and the potential pollution sources of PM in different seasons by using HYSPLIT backward trajectory model and GDAS meteorological data. The results showed that during 2019 in Jinchang, PM2.5 pollution was the most serious in winder and PM10 pollution was serious in spring. In spring and autumn, the airflow trajectories with the highest degree of PM10 pollution mainly came from the long-distance transportation in the northwest in spring and autumn, while PM2.5 pollution degree was high in summer, autumn and winter with the short-distance airflow trajectories. The contribution source areas of PM2.5 were mainly located in eastern Xinjiang and southern Russia in spring, southeastern Gansu and Alxa League in autumn, central and western Qinghai, northern Tibet, and western Xinjiang in summer and winter. |
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