基于光学遥测技术的合肥市气溶胶参数观测
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摘要
为了解合肥市气溶胶光学特性参数,采用太阳光度计CE318对雾霾期间气溶胶进行监测并分析了气溶胶光学厚度(AOD)、Angstorm波长指数(α)、体积谱函数等气溶胶光学特性参数。同时采用多轴差分吸收光谱技术(MAX-DOAS)反演了雾霾期间二次气溶胶前体物NO2柱浓度并和固定点测量的颗粒物(PM)浓度进行了对比。分析表明,雾霾期间的气溶胶光学厚度比晴天高,且随波长的增加而减少。Angstorm波长指数在雾霾天气时平均值较高,表明合肥雾霾天气期间气溶胶粒子以细粒子为主。气溶胶前体物NO2浓度变化与雾霾天气空气中颗粒物含量(PM10、PM2.5等)变化一致性较好,表明二次气溶胶可能对气溶胶颗粒浓度有一定影响。
In order to get knowledge of aerosol optical properties,such as aerosol optical depth( AOD),Angstorm wavelength exponent( α),single scattering albeo( ω),during the haze-fog period,a sunphotometer CE-318 was operated in Hefei from 2012 to 2013. Simultaneously we retrieved tropospheric differential slant column density( SCD) of NO2,which is secondary aerosol precursor,by muti-axis differential optical absorption spectroscopy( MAX-DOAS) and made some comparisons with PM10 acquired from point monitoring station. It is found that mean Angstorm wavelength exponent is relative high during haze-fog period,which indicates fine particles is predominant. The well consistency of NO2 concentration variation with PM changing indicates secondary aerosol may have some contributions to total aerosol particle concentration.
In order to get knowledge of aerosol optical properties,such as aerosol optical depth( AOD),Angstorm wavelength exponent( α),single scattering albeo( ω),during the haze-fog period,a sunphotometer CE-318 was operated in Hefei from 2012 to 2013. Simultaneously we retrieved tropospheric differential slant column density( SCD) of NO2,which is secondary aerosol precursor,by muti-axis differential optical absorption spectroscopy( MAX-DOAS) and made some comparisons with PM10 acquired from point monitoring station. It is found that mean Angstorm wavelength exponent is relative high during haze-fog period,which indicates fine particles is predominant. The well consistency of NO2 concentration variation with PM changing indicates secondary aerosol may have some contributions to total aerosol particle concentration.
引文
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[3]Niu S J,Lu C S,Yu H Y,et al.Fog research in China:An overview[J].Advances in Atmospheric Sciences,2010,27(3):639-661.
[4]Penner J E,Andreae M,Annegarn H,et al.Aerosols,their direct and indirect effects,in IPCC 2001:climate change,the science basis,contribution of working Group1 to the third assessment report of the intergovernmental panel on climate change[R].Cambridge,United Kingdom and New York,USA:Cambridge University Press,2001.
[5]吴兑.大城市区域霾与雾的区别和霾天气预警信号发布[J].环境科学与技术,2008,31(9):1-7.
[6]车慧正,张小曳,石光玉,等.沙尘和灰霾天气下毛乌素沙漠地区大气气溶胶的光学特征[J].中国粉体技术,2005,11(3):122-125.
[7]王静,牛生杰,许丹,等.南京一次典型雾霾天气气溶胶光学特性[J].环境科学,2013,33(2):201-208.
[8]于兴娜,李新妹,登增然,等.北京雾霾天气期间气溶胶光学特性[J].环境科学,2012,33(4):1 057-1 062.
[9]杨志峰.中国特征区域大气气溶胶光学特性研究[D].硕士论文,2008.
[10]Biggar S F,Gellman D I,Slater P N.Improved evaluation of optical depth components from Langley Plot Data[J].Remote Sens Environ,1990,32(2):91-101.
[11]陈良富.气溶胶遥感定量反演研究与应用[M].北京:科学出版社.
[12]Dubovik O,King M D.A flexible inversion algorithm for retrieval of aerosol optical properties from sun and sky radiance measurments[J].J Geophys Res,2000,105:20 673-20 696.
[13]Zheng Q L,Philippe G,Oleg D.Improvements for ground-based remote sensing of atmospheric[J].Journal of Quantitative Spectroscopy&Radiative Transfer,2009,131(4):1 954-1 961.
[14]吴丰成,谢品华,李昂,等.基于多轴差分吸收光谱技术的查找表法反演气溶胶消光廓线研究[J].光学学报,2013,33(6):1-9.
[15]盖长松.中国西北地区气溶胶光学厚度和波长指数观测数据的分析研究[D].北京:中国气象科学研究院硕士学位论文,2005.
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