Real Scale Experiment of Pollution and Modification of Cloud by using a Vertical Shaft.

使用垂直轴进行云污染和改变的真实规模实验。

基本信息

  • 批准号:
    09450195
  • 负责人:
  • 金额:
    $ 9.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    1997
  • 资助国家:
    日本
  • 起止时间:
    1997 至 1999
  • 项目状态:
    已结题

项目摘要

The process of sulfur dioxide dissolution into cloud droplets and its successive oxidation to sulfate were studied in an artificial cloud experimental system in a vertical shaft in Kamaishi mining company, Iwate prefecture. Sulfur compounds in droplets, aerosols and gas were collected by serial samplers at several heights. The concentrations of sulfur compounds at each height indicate that the released sulfur dioxide at the bottom of the shaft was absorbed by cloud droplets, but the oxidation rate to sulfate was slow which may be due to the absence of light and oxidants in the shaft.Sodium chloride and sodium hydrogensulfite particles were generated by humifier and injected into the base of shaft. Modal diameter of the particles is 0.1〜0.5μm. Without the particle injection, modal diameter of cloud droplets was 7 μm. With the particle injection, modal diameter of cloud droplets did not change, but the size distribution widened out to larger diameter.By using eletron microscope with X ray analyzer, we found that more than 50 % of the droplets, which arrived at top of the shaft, contained chemical species of the injected particles. But, the other particles cintained calsium carbonate. It shows that calsium carbonate particles or mineral particles coated with calsium carbonate on the surface may act as condensation nuclei in the atmosphere.
在岩手县釜石矿业公司竖井内的人工云实验系统中,研究了二氧化硫溶解成云滴并被氧化成硫酸盐的过程。在不同的高度上,通过连续采样器收集了液滴、气溶胶和气体中的硫化合物。各高度的含硫化合物浓度表明,竖井底部释放的二氧化硫被云滴吸收,但氧化成硫酸盐的速度较慢,这可能是由于竖井内缺乏光照和氧化剂的原因;氯化钠和亚硫酸氢钠颗粒由加湿器产生并注入竖井底部。颗粒的模态直径为0.1 ~ 0.5μm。在没有粒子注入的情况下,云滴的模态直径为7 μm。随着粒子的注入,云滴的模态直径没有改变,但粒径分布变宽,用电子显微镜和X射线分析仪发现,到达竖井顶部的云滴中,超过50%的云滴含有注入粒子的化学物种。但是,其他的颗粒含有碳酸钙。这表明,碳酸钙颗粒或表面包覆碳酸钙的矿物颗粒在大气中可能起凝结核的作用。

项目成果

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OHTA Sachio其他文献

OHTA Sachio的其他文献

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{{ truncateString('OHTA Sachio', 18)}}的其他基金

Research of Contaminated Aerosol Distribution by Artificial Satellite and Evaluation of the Aerosol Effect on Climate in the East Asia
东亚地区人造卫星污染气溶胶分布研究及气溶胶对气候影响评价
  • 批准号:
    17360251
  • 财政年份:
    2005
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
INDIRECT EFFECT OF AEROSOLS ON GLOVAL COOLING
气溶胶对全球冷却的间接影响
  • 批准号:
    14048201
  • 财政年份:
    2002
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
ANALYSIS OF ENVIRONMENTAL POLLUTION IN THE EAST ASIA BY SATELLITE REMOTE SENSING
东亚环境污染卫星遥感分析
  • 批准号:
    12450209
  • 财政年份:
    2000
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Research on Air Pollution and Evaluation of the Environmental Effects in Siberian Wetland.
西伯利亚湿地空气污染及环境影响评价研究。
  • 批准号:
    09041120
  • 财政年份:
    1997
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Assessment of Urban Air Pollution in Siberian Wetland
西伯利亚湿地城市空气污染评价
  • 批准号:
    06041002
  • 财政年份:
    1994
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
Evaluation of effect of suppresion due to increase of anthropogenic aerosols on the global warming
人为气溶胶增加对全球变暖的抑制效果评估
  • 批准号:
    06452280
  • 财政年份:
    1994
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
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