Trends in Surface Water Acidification in Europe and North America (1989–1998)
Trends in Surface Water Acidification in Europe and North America (1989–1998)
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欧洲和北美地表水酸化趋势（1989-1998）
DOI：
10.1023/a:1013806223310
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Andersen
中科院分区：
文献类型：
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作者：
B. Skjelkvåle;J. Stoddard;T. Andersen
在过去的20年里，欧洲和北美的减排导致大气中S-沉积减少了50%，而N-沉积几乎保持不变。从98 ICP沃茨网站的数据进行了测试的趋势，主要化学成分的浓度为10年期间，1989-1998年使用非参数季节性肯德尔检验。将研究中心按地区和类型分组进行荟萃分析。所有区域的SO 42 −* 浓度都呈显著下降趋势。另一方面，硝酸盐浓度没有显示出区域变化模式。大多数区域的盐基阳离子浓度下降。各地区DOC均呈上升趋势。ANC低的研究中心显示出最大的恢复率。无论是高NO3−或低NO3−组的网站都没有表现出显着的NO3−浓度趋势。阿尔卑斯山（非森林）站点显示出ANC和pH恢复的明确和一致的信号，以及适当的（相对于SO 42 −* 趋势）碱阳离子下降率。
During the last 20 years, emission reductions in Europe and North America have resulted in decreased atmospheric S-deposition of up to 50%, while N-deposition has stayed almost constant. Data from 98 ICP Waters sites were tested for trends in concentrations of major chemical components for the 10-year period 1989-1998 using the nonparametric seasonal Kendall test. The sites were grouped into regions and types for meta-analysis. All of the regions had highly significant downward trends in SO42−* concentrations. Nitrate concentrations, on the other hand, show no regional patterns of change. Concentrations of base cations declined in most regions. All regions showed tendencies of increasing DOC. The low ANC sites showed the largest rates of recovery. Neither the high NO3− or low NO3− groups of sites exhibited significant trends in NO3− concentrations. Alpine (non-forested) sites show clear and consistent signals of recovery in ANC and pH, and appropriate (relative to SO42−* trends) rates of base cation decline.