Intercomparison of NOx, SO2, O3, and aromatic hydrocarbons measured by a commercial DOAS system and traditional point monitoring techniques
Intercomparison of NOx, SO2, O3, and aromatic hydrocarbons measured by a commercial DOAS system and traditional point monitoring techniques
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DOI：
10.1007/bf02915707
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发表时间：
2004-03
影响因子：
5.8
通讯作者：
P. Xie;Wenqing Liu;Qiang Fu;Ruibin Wang;Jianguo Liu;Qing-nong Wei
中科院分区：
文献类型：
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作者：
P. Xie;Wenqing Liu;Qiang Fu;Ruibin Wang;Jianguo Liu;Qing-nong Wei
1999年10月至2000年1月，在北京对商用差分光学吸收光谱（DOAS）仪器（瑞典OPSIS AB）和不同的点样监测技术（PM，基于空气监测站、空气监测车和各种化学方法）进行了野外对比研究。连续4个月监测NO、NO2、SO2、O3、苯、甲苯6种微量气体的混合比例。no2和SO2在DOAS和PM数据之间有很好的一致性。然而，DOAS法测得的苯、甲苯和一氧化氮浓度明显低于点式监测仪测得的浓度。DOAS监测的臭氧水平一般高于点监测仪测量的臭氧水平。这些结果可能是由于测量地点的no - o3 - no2体系和芳烃具有很强的垂直梯度。由于DOAS系统的制造商没有透露准确的数据评估算法，因此DOAS分析中的误差也不能排除。
A field-based intercomparison study of a commercial Differential Optical Absorption Spectroscopy (DOAS) instrument (OPSIS AB, Sweden) and different point-sample monitoring techniques (PM, based on an air monitoring station, an air monitoring vehicle, and various chemical methods) was conducted in Beijing from October 1999 to January 2000. The mixing ratios of six trace gases including NO, NO2, SO2, O3, benzene, and toluene were monitored continuously during the four months. A good agreement between the DOAS and PM data was found for NO2and SO2. However, the concentrations of benzene, toluene, and NO obtained by DOAS were significantly lower than those measured by the point monitors. The ozone levels monitored by the DOAS were generally higher than those measured by point monitors. These results may be attributed to a strong vertical gradient of the NO-O3-NO2system and of the aromatics at the measurement site. Since the exact data evaluation algorithm is not revealed by the manufacturer of the DOAS system, the error in the DOAS analysis can also not be excluded.