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The concentrations of volcanic sulphur dioxide (SO 2 ) in the upper troposphere and lower stratosphere are inferred using new infrared measurements made by the Atmospheric Infrared Sounder (AIRS). Column abundance of SO 2 is derived using the strong SO 2 absorption feature near 1362 cm −1 ( ν 3 ‐band). The retrieval takes into account interference from water vapor across the band. Examples from several recent volcanic eruptions are given to illustrate the technique and the retrievals are compared to contemporaneous SO 2 ultraviolet measurements from the Ozone Monitoring Instrument (OMI), Global Ozone Monitoring Experiment (GOME) and Total Ozone Mapping Spectrometer (TOMS).
Prata et al. (Fri,) studied this question.