8 November 2014 Temperature effects on the retrieval of SO2 from ultraviolet satellite observations
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Abstract
Sulfur dioxide (SO2) has a significant impact on the urban environment pollution and global climate. Compared with regional ground monitoring networks, satellite remote sensing technology provides an unprecedented advantage for continuous, large spatial and short-revisit monitoring for atmospheric SO2. Approaches for retrieval of SO2 from ultraviolet satellite observations have been developed and applied to detection of volcanic SO2 and regional emissions. However, these retrieval algorithms do not consider the temperature variation effect on SO2 retrievals, and simply use the absorption coefficient at a constant temperature as inputs for SO2 retrievals. In this study, hyperspectral OMI measurements were used to analyze the temperature effects on the retrieval of SO2 columns. Results of DOAS algorithm showed that with increasing SO2 concentration, the retrieval errors caused by temperature effects accumulated, and the differences in SO2 columns increased to a maximum of ~25 DU (SO2 column of 293K: ~65 DU). Therefore, atmospheric temperature is an important factor which has significant influence to high precise atmospheric SO2 retrievals.
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Huanhuan Yan, Huanhuan Yan, Weihe Wang, Weihe Wang, Liangfu Chen, Liangfu Chen, } "Temperature effects on the retrieval of SO2 from ultraviolet satellite observations", Proc. SPIE 9259, Remote Sensing of the Atmosphere, Clouds, and Precipitation V, 92591X (8 November 2014); doi: 10.1117/12.2069252; https://doi.org/10.1117/12.2069252
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