光学学报, 2019, 39 (2): 0230001, 网络出版: 2019-05-10
水汽吸收对基于宽带腔增强吸收光谱的NO3自由基测量的影响 
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Influence of Water Vapor Absorption on NO3 Radical Measurement Based on Broad-Band Cavity-Enhanced Absorption Spectroscopy
图 & 表
图 1. IBBCEAS实验装置示意图和实物图。(a)示意图; (b)实物图
Fig. 1. Schematic and photo of IBBCEAS experimental device. (a) Schematic; (b) photo
图 5. 采用插值方法计算得到的水汽的有效吸收截面
Fig. 5. Effective water vapor absorption cross section obtained by interpolation method
图 6. IBBCEAS装置与商业湿度计得到的水汽浓度
Fig. 6. Water vapor concentrations obtained by IBBCEAS instrument and commercial hygrometer
图 7. 不同水汽浓度下NO3和NO2吸收谱线的拟合图。(a)测量(黑色)与拟合(红色)的吸收谱线; (b)拟合残差
Fig. 7. Fitted absorption lines of NO3 and NO2 at different water vapor concentrations. (a) Measured (black) and fitted(red) absorption lines; (b) residual of fitting
图 8. 实际大气中NO3自由基、NO2和水汽浓度反演拟合图。(a)测量的(灰线)和拟合的(红线)实际大气中NO3自由基(22.3×10-12)、NO2(6.9×10-9)和水汽(1.4%)的吸收谱;(b)测量的实际大气吸收谱(灰线)和水汽(红线)的拟合;(c)扣除水汽后的吸收谱(灰线)与NO3自由基(红线)的拟合;(d)扣除水汽和NO3自由基后的吸收谱(灰线)与NO2(红线)的拟合;(e)拟合残差(1.7×10-9 cm-1)
Fig. 8. Fitted concentration retrieval results of NO3, NO2 and H2O in ambient air. (a) Measured (gray) and fitted (red) absorption spectra of NO3 radical (22.3×10-12), NO2 (6.9×10-9) and H2O (1.4%); (b) measured absorption spectrum of ambient air (gray) and fitted H2O absorption spectrum (red); (c) absorption spectrum after subtraction of H2O absorption (gray) and fitted NO3 absorption spectrum (red); (d) absorption spectrum after subtraction of H2O absorption and NO3 radical (gray) and fitted NO2 absor
孔维平, 吴涛, 聂玮, 徐政, 赖荣, 何兴道, 陈卫东, 陈忠平. 水汽吸收对基于宽带腔增强吸收光谱的NO3自由基测量的影响[J]. 光学学报, 2019, 39(2): 0230001. Weiping Kong, Tao Wu, Wei Nie, Zheng Xu, Rong Lai, Xingdao He, Weidong Chen, Zhongping Chen. Influence of Water Vapor Absorption on NO3 Radical Measurement Based on Broad-Band Cavity-Enhanced Absorption Spectroscopy[J]. Acta Optica Sinica, 2019, 39(2): 0230001.
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