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中国降水酸度和离子浓度的时空分布

王文兴 丁国安

王文兴, 丁国安. 中国降水酸度和离子浓度的时空分布[J]. 环境科学研究, 1997, 10(2): 1-7.
引用本文: 王文兴, 丁国安. 中国降水酸度和离子浓度的时空分布[J]. 环境科学研究, 1997, 10(2): 1-7.
WANG Wenxing, DING Guoan. The Geographical Distribution of Ion Concentration in Precipitation over China[J]. Research of Environmental Sciences, 1997, 10(2): 1-7.
Citation: WANG Wenxing, DING Guoan. The Geographical Distribution of Ion Concentration in Precipitation over China[J]. Research of Environmental Sciences, 1997, 10(2): 1-7.

中国降水酸度和离子浓度的时空分布

基金项目: 国家“八五”科技攻关课题(85-912-01-01)

The Geographical Distribution of Ion Concentration in Precipitation over China

  • 摘要: 1991~1995年在全国进行了酸雨观测,建立了覆盖全国的具有区域代表性的酸沉降监测网,含271个测站?降水的pH值和电导率在现场采样后立即测量,降水样品的化学分析则在实验室里进行?主要离子SO2-4,NO-3,NH+4,Ca2+浓度的加权均值分别为125.86,19.96,67.89和80.41μeq/L?由离子浓度地理分布图看出,这些离子浓度地理分布状况因离子而异?值得注意的是降水中SO2-4和NO-3浓度,北方非酸雨区甚高于南方酸雨区,这说明降水的酸度并不简单地决定于降水中SO2-4和NO-3的绝对浓度,而决定于这些离子对于Ca2+和NH+4的相对浓度?发现了降水年均pH值低至4的一些地区,此值可能是目前世界年降水酸性最强的地区?文中还对代表性地区1986~1993年降水化学特征进行了分析,结果表明降水的酸度仍在升高?

     

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出版历程
  • 收稿日期:  1996-10-13
  • 刊出日期:  1997-04-25

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