辽宁省大气湿沉降变化趋势分析

摘要

The trend of the atmospheric wet deposition in Liaoning Province was analyzed based on the acid deposition control index data during 2009 to 2013.Results showed that the acid rain pollution was slight and steady in the whole province during recent 5 years.Precipitation was sulphate-type precipitation,in which the main ions were Ca2+and SO42-,and generally they did not change significantly with time,the largest deposition flux was SO42-,which was much higher than that of other ions,followed by NO3-and Ca2+,the annual wet deposition flux fluctuated to some extent,but overall did not change significantly,acid deposition flux was higher than alkaline deposition flux.%通过分析2009-2013年辽宁省酸沉降控制指标，得出辽宁省大气湿沉降变化趋势。结果表明，辽宁省总体上酸雨污染并不严重，近5年来呈稳定态势。降水属硫酸型降水，主要离子为Ca2+和SO42-，总体来看，各种离子随时间无显著性变化；SO42-沉降量最大，远高于其他离子，其次是NO3-和Ca2+，各年度湿沉降量有不同程度波动，但总体无显著变化；酸性物质的沉降量高于碱性物质。