期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 45, 期 8, 页码 3275-3281出版社
AMER CHEMICAL SOC
DOI: 10.1021/es1038672
关键词
-
资金
- State Key Laboratory of Environmental Simulation and Pollution Control [10Z02ESPCT]
- Norwegian Research Council [193725/S30]
Surface waters in Europe and North America are slowly recovering from acidification following major reductions in emissions of sulfur dioxide (SO2) since the 1980s. In contrast, regions affected by acid rain have been reported to be growing in China. Here we show that the rapid change in surface water chemistry in the 1990s in large areas in Southwestern China, specifically the tributary rivers of the Upper Yangtze River, caused by increasing SO2 emissions, has leveled off. During the 1990s the sulfate (SO42-) concentrations in river water increased rapidly and, on average, doubled in only eight years. Simultaneously, calcium (Ca2+) concentrations increased, while pH values decreased. In the following decade (2000s), SO2 emissions stabilized, causing a subsequent stop to the increasing SO42- concentrations and pH decline in river water. Although a rapid response to future reduction in SO2 emissions can be expected, a rapid increase of nitrogen (N) emissions could lead to increases in N leaching and delay recovery.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据