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April 23, 2026Journal of Geophysical Research Planets

Decadal Variations of the H 2 SO 4 Gas Mixing Ratio in the Venusian Low‐Latitude Region From Venus Express and Akatsuki Radio Occultation Data

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Authors

HAH AndoKNKatsuyuki NoguchiTITakeshi Imamura

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Overview

Analysis reveals long-term changes in vapor mixing ratio and temperature in Venus' atmosphere, indicating climate variability.

Key Points

  • This research aims to explore long-term variations in sulfuric acid vapor mixing ratio and temperature in the lower cloud layer of Venus.
  • Analyzed radio occultation data from Venus Express and Akatsuki.
  • Focused on data from 2006 to 2023, specifically within 42–54 km altitude at low latitudes.
  • Assessed correlations between sulfuric acid vapor mixing ratio and temperature.
  • Vapor mixing ratio above the cloud base remained constant from 2006 to 2008, decreased until 2018, then increased.
  • Temperature trends mirrored the variations in vapor mixing ratio.
  • Findings indicate long-term changes in the Venusian cloud structure linked to these variations.

Cite This Study

Ando et al. (2026) studied this question.

synapsesocial.com/papers/69e9baa885696592c86ecaa9https://doi.org/10.1029/2025je009567
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