中文摘要：

基于武汉市1990—2014年空气污染物（SO2,NOx/NO2,TSP/PM10）年均值浓度数据,采用Daniel趋势检验和空间统计方法研究污染物浓度时间变化趋势和空间变异。研究发现武汉市近20年SO2浓度变化平稳且满足国家二级标准限值,而氮氧化物（NOx/NO2）浓度显著上升并超过标准限值,颗粒物（TSP/PM10）浓度虽然有下降趋势,但依然未达到标准限值。武汉市近10年SO2污染空间变化最明显,重污染区域由城区向郊区转移;NO2污染空间差异最显著,二环线内监测点NO2浓度一直高于二环线外且平均高9.2%,而二环线内监测点SO2、PM10浓度低于二环线外。

英文摘要：

Historical data of air pollutants（ SO2,NOx/ NO2,TSP/PM10） of Wuhan City was collected from 1990 to 2014.Daniel trend test and spatial statistics were adopted to analyze the long-term trends and spatial variability of air pollutants concentrations. In the past two decades,the variation of SO2 concentration was stable and it could meet the requirement of national grade II standard,while the concentrations of nitrogen oxides（ NOx/ NO2） increased dramatically and were higher than the limitations; on the other hand,although concentrations of particles（ TSP / PM10） decreased apparently,they did not meet the requirement yet. In the past decade,SO2 pollution experienced obvious spatial transition with severely polluted areas of SO2 transferring from urban areas to suburban. NO2 pollution showed the most obvious spatial disparity as concentration of NO2 aggregating from sites within the 2nd ring road exceeded than outside all the time with 9. 2% higher on average,while concentrations of SO2,PM10 within the 2nd ring road was below than outside.