Microwave Remote Sensing of Sulfuric Acid Vapor in the Venus Atmosphere

Physics

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Scientific paper

An increased understanding of the climatology of Venus can be obtained through remote sensing of the spatial variations of sulfuric acid vapor in its atmosphere. As part of this research, new laboratory measurements of gaseous H2SO4 microwave opacity under simulated Venus atmospheric conditions have been performed. A model of the microwave absorptivity of H2SO4 vapor was developed which is consistent with the laboratory measurements. This model is then applied to the results of Venus radio occultation measurements to yield detailed vertical profiles as well as zonal and latitudinal variations of gaseous H2SO4 abundance. In addition, a dual frequency microwave observation of Venus was performed using the Very Large Array (VLA). Our model for H2SO4 vapor opacity is used in conjunction with the Venus radio occultation results in a newly developed radiative transfer model to invert the received VLA radiances and infer spatial variations of gaseous H2SO4 across the disk of the planet.

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