引用本文:苏继峰,朱彬,高晋徽,肖辉,荆宁.基于Matlab小波分析的南京北郊大气O3浓度变化特征研究[J].环境监控与预警,2012,4(2):45-49
.Observational study of ozone concentrations in northern suburb of Nanjing based on Matlab wavelet analysis[J].Environmental Monitoring and Forewarning,2012,4(2):45-49
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基于Matlab小波分析的南京北郊大气O3浓度变化特征研究
苏继峰,朱彬,高晋徽,肖辉,荆宁
作者单位
苏继峰1,2,朱彬1,高晋徽1,肖辉1,荆宁3 1.南京信息工程大学中国气象局大气物理与大气环境重点开放实验室江苏 南京 2100442.中国人民解放军94857部队61分队安徽 芜湖 2410003.山西省气候中心山西太原 03002 
摘要:
以2008年南京北郊大气中O<sub>3</sub> 质量浓度观测资料和常规观测资料为基础,利用Matlab小波分析工具,对O<sub>3</sub>浓度的年时间序列进行分析,得出该地区的O<sub>3</sub> 日均浓度的变化特征:春、夏季节O3浓度大于秋、冬季节,最高浓度出现在春末夏初,最低浓度出现在冬季;并且全年共有5个突变点;弱高压的天气系统、较高的温度、较低的湿度和晴朗少云的天气是造成南京北郊O<sub>3</sub>浓度突变的主要气象因素。结合HYSPLIT气流后向轨迹模拟,对污染源来源进行追踪,结果表明:南京北郊O<sub>3</sub>高浓度污染来源主要分为本地局地污染和外来污染物输送两类;垂直方向上,O<sub>3</sub>的区域尺度或中尺度的输送主要稳定在混合层的底层。
关键词:  O3浓度  时间序列  小波分析  后向轨迹
DOI:
分类号:
基金项目:国家973项目(2009CB426313);教育部博士点基金项目(20093228180003)
Observational study of ozone concentrations in northern suburb of Nanjing based on Matlab wavelet analysis
Abstract:
Based on the O<sub>3</sub> and meteorological data observed in northern suburb of Nanjing in 2008, the time series and the variation characteristics of the daily averaged O<sub>3</sub> was analyzed with a Matlab wavelet method, the results indicated that the O<sub>3</sub> concentration in spring and summer were higher than that in autumn and winter . And the daily maximum and minimum values were presented in late spring to early summer and winter respectively. There were five O<sub>3</sub> concentration mutation points during the whole year.. The mutational variation of the O<sub>3</sub> concentration was caused by the high-pressure system, high temperature, low humidity and the sunny and cloudless climate. The source of the pollutants was studied with a HYSPLIT-4 pollutant dispersion model, the results showed that the pollution source leaded to the higher level of O<sub>3</sub> concentration was mostly come form the local pollutant and transportation of outer pollutant, the transportation of the O<sub>3</sub> in regional scale or mesoscale was mainly stabilized at the bottom of mixing layer in the vertical direction.
Key words:  ozone concentrations  Time series  Wavelet analysis  Back-trajectories