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2015 , Vol. 33 >Issue 9: 18 - 24

DOI: https://doi.org/10.3981/j.issn.1000-7857.2015.09.002

研究论文

西安南二环5月PM10质量浓度时空变化规律

  • 王兴敏 ,
  • 赵景波
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  • 1. 陕西师范大学旅游与环境学院, 西安710062;
    2. 中国科学院地球环境研究所气溶胶化学与物理重点实验室, 西安710075
王兴敏, 硕士研究生, 研究方向为环境科学, 电子信箱:wangxingmin@stu.snnu.edu.cn

收稿日期: 2015-04-05

  修回日期: 2015-04-25

  网络出版日期: 2015-05-15

基金资助

国家自然科学基金重点项目(NSFC41230641);中国科学院战略性先导科技专项(XDB05060500)

收起

Spring inhalable particle concentration space-time changes of Xi'an South Second Ring

  • WANG Xingmin ,
  • ZHAO Jingbo
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  • 1. Tourism and Environment College, Shaanxi Normal University, Xi'an 710062, China;
    2. Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China

Received date: 2015-04-05

  Revised date: 2015-04-25

  Online published: 2015-05-15

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摘要

利用电脑微激光粉尘仪对西安市南二环2013 年春季5 月70 m 高度范围内的可吸入颗粒物(PM10)质量浓度进行了4 个昼夜的监测。观测发现, 西安南二环PM10质量浓度昼夜变化可分为5 个阶段: 第1 阶段在8:00—10:00, PM10平均质量浓度范围0.056 mg/m3; 第2 阶段在12:00—14:00, PM10平均质量浓度为0.075 mg/m3; 第3 阶段在16:00—18:00, PM10平均质量浓度为0.058 mg/m3; 第4 阶段在20:00—22:00, PM10 平均质量浓度为0.070 mg/m3; 第5 阶段在0:00—6:00, PM10 平均质量浓度为0.038 mg/m3。高分辨率地垂向观测结果表明, 西安5 月PM10质量浓度垂向变化可分为3 种类型: 第1 种类型, 随着高度的增加PM10质量浓度增加幅度居中, 平均递增率为0.048 μg/m; 第2 种类型, 随着高度的增加PM10质量浓度幅度增加最大, 递增率为0.065 μg/m, 且波动变化明显; 第3 种类型, 随着高度的增加PM10质量浓度增加幅度最小, 递增率为0.013 μg/m。西安南二环5月PM10质量浓度在1 m 高度处最低, 平均为0.048 mg/m3; 4~46 m 高度范围内质量浓度较低, 平均为0.051 mg/m3; 在49~67m高度范围内质量浓度较高, 平均为0.052 mg/m3; 在70m 处最高, 平均为0.056 mg/m3。观测期间PM10质量浓度与4 m 处的温度之间为显著正相关(y=240.73x+12.305), 与4、7、10 m 高度处的湿度为显著负相关(y=-606.42x+82.08)。

关键词： PM10质量浓度; 阶段变化; 垂向变化; 西安南二环

本文引用格式

王兴敏 , 赵景波 . 西安南二环5月PM10质量浓度时空变化规律[J]. 科技导报, 2015 , 33(9) : 18 -24 . DOI: 10.3981/j.issn.1000-7857.2015.09.002

Abstract

The concentrations of PM10 within the 70 m height range at the South Second Ring of Xi'an were monitored for 4 days and nights in May 2013 by a microcomputer laser dust monitor. The results show that PM10 concentration varied in 5 phases of the day.The first phase was at am 8:00-10:00, with an average concentration of 0.056 mg/m3. The second was at 12:00-14:00, with an average concentration of 0.075 mg/m3. The third was at pm 16:00-18:00, with an average concentration of 0.058 mg/m3. The fourth was at 20:00-22:00, with an average concentration of 0.070 mg/m3. The fifth one was in the night of 0:00-6:00, with an average concentration of 0.038 mg/m3. High resolution vertical observations indicate that Xian vertical variation of PM10 concentrations can be divided into three types in May. The first type decreases as altitude increases PM10 concentration increases was middle, the average increase rate for 0.048 μg/m. The second type as the altitude increases PM10 concentration was the highest increase rate for 0.065 μg/m and volatile changes significantly. The third type as the height increases PM10 concentration was the lowest and the increase rate for 0.013 μg/m. At the height of 70 m the mass concentration of PM10 was the highest, the mean value being 0.56 mg/m3; the concentration at 1m height was the lowest, the average concentration being 0.048 mg/m3. In the range of 4-46 m height, the PM10 mass concentration was the second lowest, with an average concentration of 0.051 mg/m3. In the scope of 49-67 m, the PM10 mass concentration was the second highest, with an average concentration of 0.052 mg/m3, which presented a remarkable increasing trend. During the observation period, the mass PM10 concentration and the temperature had a marked positive correlation at the height of 4 m (Correlation formula is y=240.73x +12.305). The mass PM10 concentration and the humidity had a marked negative correlation at the heights of 4, 7, and 10 m (Correlation formula is y=-6.0668x+0.821).

Key words： PM10 mass concentrations; phase change; vertical variation; South Second Ring of Xi'an

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