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济南地区一次沙尘过程的激光雷达观测分析
Lidar Detection Analysis of a Sand-Dust Process in Jinan
投稿时间:2018-08-07  修订日期:2019-02-14
DOI:10.19316/j.issn.1002-6002.2019.05.21
中文关键词:  沙尘  激光雷达  光学特性  PM2.5  传输路径
英文关键词:sand dust  lidar  optical characteristics  PM2.5  transmission path
基金项目:山东省科技计划项目(2014GSF117038);山东省重点研发计划项目(2015GGH301002);山东省省级环保产业技术研发(SDHBYF-2012-01)
作者单位
张文娟 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
李敏 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
吕波 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
吕晨 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
付华轩 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
姜腾龙 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
陈妍君 济南市环境监测中心站,山东 济南250014
济南市环境保护科学研究院,山东 济南250014 
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中文摘要:
      利用微脉冲激光雷达探测技术,结合常规污染物监测以及PM2.5化学组分监测数据,对2017年5月影响济南地区的一次沙尘天气过程进行分析。结果表明:5月4日12:00沙尘天气开始影响济南市,PM10小时浓度大幅升高,至5月5日13:00,PM10小时浓度达到峰值(质量浓度953 μg/m3)。沙尘过境期间近地面1 500 m以下形成消光系数和退偏比极大区,其中5月5日11:00—13:00,300 m处退偏比平均高达0.19,非球形特性显著。沙尘天气过程中Mg2+组分、Ca2+组分增幅最为明显。后向轨迹模型HYSPLIT显示,此次沙尘起源于内蒙古中西部地区,沿高空西北方向传输至济南地区。
英文摘要:
      A dust pollution episode in the May 2017 was analyzed based on regular pollutants observation, chemical component detection and lidar observation. The results indicated that the dust reached Jinan at 12:00 on May 4th. The hourly concentration of PM10increased significantly. And at 13:00 on May 5th, the hourly concentration of PM10 reached its peak (953 μg/m3). During the whole dust period, the aerosol extinction coefficient and depolarization ratio of the near ground under 1 500 m were very large, at 11:00-13:00 on May 5th, the average depolarization ratio of 300 m was up to 0.19, non-spherical characteristics were significant. The concentration increase of Ca2+ and Mg2+ were the most obvious during the chemicalcompositions of PM2.5. The backward trajectory model of HYSPLIT showed that the dust originated in the central and western Inner Mongolia and traveled to Jinan along the northwest direction.
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