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The Influence of Sulfur Dioxide on Dobson Spectrophotometer Total Ozone Measurement: Analysis on the Basis of Theoretical Factor

Weiguo Wang, Suying Chai, Haoyue Wang, Wenxuan Fan, Ke Yu, Shukun Liang and Junbang Ma
Journal of Coastal Research
Special Issue No. 73. Recent Developments on Port and Ocean Engineering (Winter 2015), pp. 353-358
Stable URL: http://www.jstor.org/stable/43843292
Page Count: 6
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Abstract

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 AγAD 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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