Temperature effects on the retrieval of SO2 from ultraviolet satellite observations

Huanhuan Yan; Weihe Wang; Liangfu Chen

doi:10.1117/12.2069252

8 November 2014 Temperature effects on the retrieval of SO₂ from ultraviolet satellite observations

Huanhuan Yan, Weihe Wang, Liangfu Chen

Proceedings Volume 9259, Remote Sensing of the Atmosphere, Clouds, and Precipitation V; 92591X (2014) https://doi.org/10.1117/12.2069252
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

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 SO₂retrievals, and simply use the absorption coefficient at a constant temperature as inputs for SO₂retrievals. 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 SO₂retrievals.

Citation Download Citation

Huanhuan Yan, Weihe Wang, and 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); https://doi.org/10.1117/12.2069252

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