2000-2009年乌鲁木齐市湿沉降变化特征

Analysis on Wet Deposition in Urumqi during the Period from 2000 to 2009

根据乌鲁木齐市2000-2009年酸沉降观测资料,分析主要控制指标的特征变化。结果表明:乌鲁木齐市的湿沉降污染严重,除氮湿沉降为1.06 g.m-2,与全国平均水平基本持平外;硫湿沉降为3.21 g.m-2、钙湿沉降为3.22 g.m-2,均高于其他省市。硫湿沉降主要源于本地SO2的排放,近年来又有加重的态势;而氮沉降对湿沉降的贡献有增强趋势,同时钙湿沉降的降低有可能导致湿沉降酸化的加剧。

Based on the monitoring date of acid deposition in Urumqi during the period from 2000 to 2009, in this paper the main characteristics of wet deposition were analyzed. The results show that wet deposition pollution was serious in Urumqi. Except the wet nitrogen deposition flux was 1.06 g · m^-2 and similar to the average of whole China, wet sulfur and calcium deposition fluxes were 3.21 g · m^-2 and 3.22 g· m^-2 respectively and higher than those in other provinces and cities in China. Wet sulfate deposition in Urumqi came mainly from the local SO2 sources, it became more and more serious in recent years, the contribution of nitrogen deposition to the total wet deposition was in an increase trend, and the decrease of wet calcium deposition may result in a more serious acidification of wet deposition.