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A recent Geophysical Research Letters paper (McPeters, 1993) reported the use of the Solar Backscatter Ultraviolet Spectrometer (SBUV/2) to measure the mass of sulfur dioxide clouds produced by the June, 1991 explosive eruption of Pinatubo.
In this paper McPeters compared SBUV/2 values with measurements reported by us (Bluth et al., 1992) on the same eruption using the Total Ozone Mapping Spectrometer (TOMS).
McPeters claimed that TOMS values for the Pinatubo SO2 budget are too high by as much as 50%.
In this Comment we wish to clarify and respond to the arguments presented with respect to the capabilities and limitations of both TOMS and SBUV/2.
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