• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Tenth International Conference on Modelling, Monitoring and Management of Air Pollution Jul, 2002 City of Segovia >Eleven-year time series of chemical components in wet and dry deposition in Hong Kong
【24h】

Eleven-year time series of chemical components in wet and dry deposition in Hong Kong

机译：香港干湿沉积化学成分的11年时间序列

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study concerns the long-term variation of the compositions of wet and dry deposition in an Asian megacity. Weekly sampling of wet and dry deposition, from 1988 to 1998, was performed by the Environmental Protection Department of Hong Kong, at two urban monitoring stations Kwun Tong (KT) and Central/Western (CW). We have statistically analysed the accumulated datasets for the soluble and insoluble components. It was found that Na~+, Cl~-, SO_4~(2-) were the most abundant components in wet deposition but insoluble Si and soluble calcium were among the most abundant in dry deposition. The volume-weighted mean pH for wet deposition at KT (CW) was 4.46 (4.43), indicating an acid rain scenario in Hong Kong. By contrast, dry deposition was generally basic, with Ca~(2+) being the most abundant soluble ion. From the weekly sampling program, [Cl~-]/[Na~+] and [Mg~(2+)]/[Na~+] ratios were close to those of seawater for both wet and dry deposition. Least squares linear regression revealed decreases in dry deposition fluxes with time for most components. The sources of components in wet and dry deposition have been discussed.
机译：这项研究涉及一个亚洲大城市的干，湿沉降成分的长期变化。香港环境保护署于1988年至1998年，在观塘（KT）和中西区（CW）的两个城市监测站进行了每周的干湿沉积物采样。我们已经统计分析了可溶和不可溶成分的累积数据集。结果表明，Na〜+，Cl〜-，SO_4〜（2-）是湿法沉积最丰富的组分，而不溶性Si和可溶性钙是干法沉积最丰富的组分。 KT（CW）湿沉降的体积加权平均pH为4.46（4.43），表明香港发生酸雨。相比之下，干法沉积通常是基本的，其中Ca〜（2+）是最丰富的可溶性离子。从每周采样程序来看，无论是干沉降还是湿沉降，[Cl〜-] / [Na〜+]和[Mg〜（2 +）] / [Na〜+]的比率都接近于海水的比率。最小二乘线性回归表明，大多数组分的干沉积通量随时间减少。已经讨论了湿法和干法沉积中成分的来源。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号