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北京市CFCs和CCl4的浓度水平与变化趋势

孙学志 万 丹 史烨弘 张剑波 胡建信

孙学志, 万 丹, 史烨弘, 张剑波, 胡建信. 北京市CFCs和CCl4的浓度水平与变化趋势[J]. 环境科学研究, 2010, 23(6): 674-679.
引用本文: 孙学志, 万 丹, 史烨弘, 张剑波, 胡建信. 北京市CFCs和CCl4的浓度水平与变化趋势[J]. 环境科学研究, 2010, 23(6): 674-679.
SUN Xue-zhi, WAN Dan, SHI Ye-hong, ZHANG Jian-bo, HU Jian-xin. Concentrations and Trends of CFCs and CCl[STHZ]4[STBZ] in the Atmosphere of Beijing[J]. Research of Environmental Sciences, 2010, 23(6): 674-679.
Citation: SUN Xue-zhi, WAN Dan, SHI Ye-hong, ZHANG Jian-bo, HU Jian-xin. Concentrations and Trends of CFCs and CCl[STHZ]4[STBZ] in the Atmosphere of Beijing[J]. Research of Environmental Sciences, 2010, 23(6): 674-679.

北京市CFCs和CCl4的浓度水平与变化趋势

基金项目: 国家环保公益性行业科研专项(200709015)

Concentrations and Trends of CFCs and CCl[STHZ]4[STBZ] in the Atmosphere of Beijing

  • 摘要: 采用预浓缩-GC/MS方法对2009年4—8月北京市大气中CFC-11,CFC-12,CFC-113,CFC-114和CCl4 5种主要消耗臭氧层物质进行了监测. 结果表明:观测期内北京市大气中φ(CFC-11),φ(CFC-12)和φ(CCl4)的平均值高于全球本底站观测值,而φ(CFC-113)和φ(CFC-114)与全球本底水平相当,其原因是这5种物质在我国的排放水平差异所致,其中CFC-11,CFC-12和CCl4仍存在一定量的排放. 不同季节的日变化分析表明,4月5种物质的体积分数日变化趋势平缓,而8月观测日内基本呈现出夜间物质的体积分数高于白天的特征. 8月φ(CFC-11),φ(CFC-12)和φ(CCl4)的平均值比4月高,这可能是由于8月的温度较高,致使这3种物质现有排放源的排放量增加.

     

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出版历程
  • 收稿日期:  2009-11-20
  • 修回日期:  2010-01-25
  • 刊出日期:  2010-06-25

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