| 北京地区的非酸性降水和气溶胶 |
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| 引用本文： | 王明星.北京地区的非酸性降水和气溶胶[J].气象学报,1985,43(1):45-52. |
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| 作者姓名： | 王明星 |
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| 作者单位： | 中国科学院大气物理研究所 |
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| 摘 要： | 本文计算了降水与大气CO_2和SO_2处于平衡态时,干净地区和污染地区的降水酸度。结果是,中纬度干净地区降水的pH值在5以下。在气溶胶浓度较高的北京地区,由于气溶胶中的氯化物和CaO与降水中的酸性物质反应,降水的pH值增加。降水pH值与云中液态水含量、降水量以及气溶胶中Cl和Ca的浓度有关。用这种机制可以解释在SO_2和气溶胶浓度都很高的北京地区所观测到的非酸性降水。
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| 收稿时间： | 1982/7/16 0:00:00 |
| 修稿时间： | 1984/2/10 0:00:00 |
NON-ACID RAIN IN BEIJING AND ATMOSPHERIC AEROSOL |
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| Wang Mingxing.NON-ACID RAIN IN BEIJING AND ATMOSPHERIC AEROSOL[J].Acta Meteorologica Sinica,1985,43(1):45-52. |
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| Authors: | Wang Mingxing |
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| Institution: | Institute of Atmospheric Physics, Academia Sinica |
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| Abstract: | The acidity of precipitation in equilibrium with atmospheric CO2 and SO2 has been calculated for both clean and polluted areas. It shows that in temperate latitudes the pH value of precipitation in clean areas is below 5 due to the existence of SO2 and COa. In Beijing, where the aerosol concentration is high, the pH value of precipitation is increased by the reactivity of chloride and Ca0 with acidic substances. The pH value of precipitation in Beijing is closely relaled to the liquid water content in cloud, the rainfall amount and the concentralions of particulate Cl and Ca in the atmosphere. This mechanism may help to explain the non-acid rain in Beijing where the concentration of S02 is high. |
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