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广州城区近地面层大气污染物垂直分布特征

王宇骏 黄祖照 张金谱 梁桂雄 陈彦宁 邝俊侠 裴成磊

王宇骏, 黄祖照, 张金谱, 梁桂雄, 陈彦宁, 邝俊侠, 裴成磊. 广州城区近地面层大气污染物垂直分布特征[J]. 环境科学研究, 2016, 29(6): 800-809.
引用本文: 王宇骏, 黄祖照, 张金谱, 梁桂雄, 陈彦宁, 邝俊侠, 裴成磊. 广州城区近地面层大气污染物垂直分布特征[J]. 环境科学研究, 2016, 29(6): 800-809.
WANG Yujun, HUANG Zuzhao, ZHANG Jinpu, LIANG Guixiong, CHEN Yanning, KUANG Junxia, PEI Chenglei. Vertical Distribution Characteristics of Air Pollutants in the Near-Surface Atmospheric Layer in Guangzhou Urban District[J]. Research of Environmental Sciences, 2016, 29(6): 800-809.
Citation: WANG Yujun, HUANG Zuzhao, ZHANG Jinpu, LIANG Guixiong, CHEN Yanning, KUANG Junxia, PEI Chenglei. Vertical Distribution Characteristics of Air Pollutants in the Near-Surface Atmospheric Layer in Guangzhou Urban District[J]. Research of Environmental Sciences, 2016, 29(6): 800-809.

广州城区近地面层大气污染物垂直分布特征

基金项目: 广州市科技计划目(201300000130)

Vertical Distribution Characteristics of Air Pollutants in the Near-Surface Atmospheric Layer in Guangzhou Urban District

  • 摘要: 为更好地了解广州城区近地面层大气污染物的扩散与输送过程,利用广州塔4层大气污染物垂直梯度观测平台(高度分别为地面、118、168和488 m)于2014年1月—2015年12月对多种大气污染物进行连续观测,分析了广州城区近地面层大气污染物的垂直分布特征.结果表明:①ρ(PM10)、ρ(PM2.5)、ρ(PM1)、ρ(NO2)和ρ(NO)随高度的上升而降低,其中ρ(PM10)、ρ(PM2.5)和ρ(PM1)在低层(地面点位)—高层(488 m点位)的递减率分别为35%、30%和26%,ρ(NO2)和ρ(NO)分别为75%和84%;ρ(O3)随高度上升而增加,其低层—高层的增长率为135%;ρ(SO2)和ρ(CO)则随高度上升先增后减.②除ρ(O3)外,其余污染物浓度均符合“冬强夏弱”的季节特征,ρ(O3)则在夏秋季较高,春冬季较低.冬季ρ(PM10)、ρ(PM2.5)、ρ(NO2)和ρ(NO)高、低层间差异为全年各季最大,分别为38.6、18.5、49.4和31.9 μg/m3.③各污染物小时浓度日变化特征均不同程度地受混合层发展过程的影响,各高度污染物浓度在一天中混合层高度最高的时段(12:00—17:00)最接近,而在其余时段分层较明显.除O3外,其余污染物质量浓度在中、低层大致呈早晚双峰分布,而在高层大致呈单峰分布.ρ(O3)则在各层均保持单峰分布,峰值一致出现在14:00.④对一次典型污染过程分析发现,不同高度的ρ(PM2.5)和ρ(NO2)最大差值分别可达183.0和148.0 μg/m3,ρ(PM2.5)显著地受到本地近地面污染源的影响,污染物高浓度区域主要集中在488 m以下.

     

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出版历程
  • 收稿日期:  2016-01-06
  • 修回日期:  2016-03-17
  • 刊出日期:  2016-06-25

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