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北京秋冬季近地层PM2.5质量浓度垂直分布特征

杨 龙 贺克斌 张 强 王歧东

杨 龙, 贺克斌, 张 强, 王歧东. 北京秋冬季近地层PM2.5质量浓度垂直分布特征[J]. 环境科学研究, 2005, 18(2): 23-28.
引用本文: 杨 龙, 贺克斌, 张 强, 王歧东. 北京秋冬季近地层PM2.5质量浓度垂直分布特征[J]. 环境科学研究, 2005, 18(2): 23-28.
YANG Long, HE Ke-bin, ZHANG Qiang, WANG Qi-dong. Vertical Distributive Characters of PM2.5 at the Ground Layer in Autumn and Winter in Beijing[J]. Research of Environmental Sciences, 2005, 18(2): 23-28.
Citation: YANG Long, HE Ke-bin, ZHANG Qiang, WANG Qi-dong. Vertical Distributive Characters of PM2.5 at the Ground Layer in Autumn and Winter in Beijing[J]. Research of Environmental Sciences, 2005, 18(2): 23-28.

北京秋冬季近地层PM2.5质量浓度垂直分布特征

Vertical Distributive Characters of PM2.5 at the Ground Layer in Autumn and Winter in Beijing

  • 摘要: 选取秋冬两季各14 d对北京地区近地层ρ(PM2.5)垂直分布进行监测,获得ρ(PM2.5)垂直廓线;结合同步测得的气象数据,就气象因素对垂直分布的影响进行了分析;最终拟合了ρ(PM2.5)垂直廓线方程.研究表明:秋冬两季ρ(PM2.5)的垂直分布随高度增加而呈对数递减的规律;风速随高度的变化遵循对数规律;发生逆温时,大气层结稳定,垂直方向上的湍流受到抑制,风速与PM2.5逐时质量浓度在垂直方向的分布呈较好的线性关系,ρ(PM2.5)随高度改变呈显著的对数相关关系;而在非逆温的情况下,PM2.5逐时质量浓度垂直分布与风速线性相关的概率较小,质量浓度的垂直分布与高度的对数关系不显著.

     

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出版历程
  • 收稿日期:  2004-06-07
  • 刊出日期:  2005-04-25

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