Wang, W.; Chai, S.; Wang, H.; Fan, W.; Yu, K.; Liang, S., and Ma, J., 2015. The influence of sulfur dioxide on dobson spectrophotometer total ozone measurement: Analysis on the basis of theoretical factor.

Using the WOUDC observational data and absorption cross sections of O3 and SO2, SO2, the paper has calculated absorption coefficients and the theoretical factor C to analyze the influence of sulfur dioxide (SO2) on Dobson spectrophotometer total ozone measurement. The calculation results show that: SO2 absorption coefficient ΔγAD is 1.843, and influence factor C related to ΔγAD has obvious seasonal variation that reaches a maximum in winter and a minimum in summer; moreover, the presence of SO2 leads to higher amount of Dobson ozone than the actual values. After the correction by using the factor C, the relative difference between Dobson and Brewer data sets shows a decrease by 1∼3%. On the other hand, the effect of SO2 on Dobson total ozone is reduced due to the decrease of total SO2, but it should still be taken into account during a high-pollution period.

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© 2015 Coastal Education and Research Foundation
2015
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