太阳光谱方法测量成都地区大气二氧化氮浓度  

Measurement of NO_2 Concentration in Atmosphere in Chengdu by Solar Spectra

作　　者：左浩毅[1] 高洁[1] 程娟[1] 郑玉臣[2] 杨经国[1] 

机构地区：[1]四川大学物理系,四川成都610064 [2]香港城市大学物理及材料科学系

出　　处：《光谱学与光谱分析》2006年第7期1356-1359,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(60078020;60478044)资助项目

摘　　要：文章报道的是用太阳光谱方法测量成都地区NO2浓度的实验研究,使用CCD光学多道分析器采集成都市区和西岭雪山的太阳光谱,以大气上界太阳光谱为参考,对五个分立光谱段以最小二乘法进行数据拟合,应用差分吸收原理解谱,获得了成都市区和西岭雪山NO2浓度。成都市区NO2浓度(垂直柱体密度)在3.1×1016至5.8×1016(molecule.cm-2)之间,西岭雪山的NO2浓度在0.7×1016至1.0×1016(mole-cule.cm-2)之间。随大气温度的上升,NO2浓度有上升趋势。In the present paper, a new improved method for measuring NO2 concentration of atmosphere by using differential optical absorption spectroscopy of solar spectrttm was reported. The sample solar spectra were collected in Chengdu city and Xiling Mountain respectively by a CCD optical multi-channel analyzer. With the upper atmosphere solar spectrum as the reference spectrum, by fitting the sample spectrum and the reference spectrum using least-square method in five spectrum ranges, the various NO2 concentrations（vertical column density） of 3. 1×10^16 to 5. 8 ×10^16（molecule· cm^-2 ） in Chengdu city and 0. 7×10^16 to 1.0×10^16 （molecule ·cm^-2 ）in Xiling Mountain were obtained respectively. The NO2 concentrations of atmosphere showed an increasing tendency with the rising temperature.

关 键 词：大气污染 太阳光谱 N02浓度 差分吸收 

分 类 号：P422.3[天文地球—大气科学及气象学]