摘要
搜集了武汉市2006年~2013年8a间的PM10和气态污染物(包括SO2、NO2、NO、CO和O3)质量浓度监测数据.利用基于Loess的季节趋势分解和窗口滑动平均等时间序列分析方法提取了各种监测指标的长期趋势、季节变化和周变化规律.结果表明,武汉市PM10历经了6a的缓慢下降后于2012年后开始急剧上升,SO2出现明显的下降趋势,其他污染物在2013年之前呈现出小幅上升或基本稳定的趋势,2013年有明显上升;季节规律方面,PM10、SO2、NOX和CO都表现出冬季高夏季低的变化特征,O3则呈现相反的变化特征,另外每年4月PM10会出现一个小高峰现象;PM10表现出明显的周变化规律,呈现出以周三为谷值周六为峰值的周期性变化,而其他气态污染物基本没有明显的周变化规律.
In this study,we had collected measurements of mass concentrations of PM10 and other gaseous pollutants,including sulphur dioxide,nitrogen dioxide,nitrogen monoxide,carbon monoxide and ozone,from 2006 to 2013.Methods of time series analysis,such as seasonal trend decomposition by Loess and sliding window analysis,were utilized to analyse the long-term trend,seasonal and weekly variability of PM10 and gaseous pollutants.Results show that the concentration of PM10 deceased slowly since 2006 and started to increase dramatically after 2012.The concentration of SO2 decreased significantly while concentrations of other gaseous pollutants kept steady before 2013 but had increased significantly since then.Regarding the seasonal variability,concentrations of all pollutants except ozone were high in the winter and were low in the summer.However,a reverse variability was observed for ozone.At last,an evident weekly cycle was witnessed for PM10.Its concentration fell to the minimum on Wednesday and reached the maximum on Saturday.Meanwhile,no evident weekly cycles were witnessed for gaseous pollutants according to our observations.
出处
《华中师范大学学报（自然科学版）》
CAS
北大核心
2015年第2期280-286,共7页
Journal of Central China Normal University：Natural Sciences
基金
国家自然科学基金项目(41127901)
武汉市重大科技攻关专项项目
地理国情监测国家测绘地理信息局重点实验实开放基金项目(2014NGCM)
