| 摘要: |
| 1994～1995年在北京市区安慧里进行了降水观测,分析了降水离子浓度,对夏季典型气象条件下的降水事件进行了后推气流轨迹分析?结果表明,北京市区年降水pH均值为5左右,夏季pH值最低,平均为4.88,说明北京出现了酸雨?气流轨迹分析显示,S-E扇形方向来流的降水酸度高;N-W扇形方面来流的降水酸度低? |
| 关键词: 降水酸性 后推气流轨迹 |
| DOI： |
| 分类号: |
| 基金项目:国家“八五”科技攻关项目(85-912-01-01) |
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| On the Precipitation Acidity in Beijing |
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WANG Wenxing, ZHANG Wanhua
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Chinese Research Academy of Environmental Sciences, Beijing 100012
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| Abstract: |
| The precipitation measurements were conducted in Beijing from 1994 to 1996, and back trajectories for typical precipitation were analyzed. Results show that the annual avergage pH of precipitation in Beijing is around 5, the lowest pH is 4.88 in summer. The back trajectories show that the precipitation pH is lowest when the air flows from S-E sector, on the contrary, the pH is highest when the air flows from N-W sector. |
| Key words: Precipitation acidity Back trajectory |
