Japan Geoscience Union Meeting 2019

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[E] Poster

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS05] Recent advances of Venus science

Mon. May 27, 2019 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Takehiko Satoh(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Takeshi Horinouchi(Faculty of Environmental Earth Science, Hokkaido University), Masaru Yamamoto(Research Institute for Applied Mechanics, Kyushu University), Kevin McGouldrick(University of Colorado Boulder)

[PPS05-P08] Development of a Venus' cloud formation scheme for a convection resolving model

*Ko-ichiro SUGIYAMA1, Nozomu Fukuhara1, Masatsugu Odaka2, Kensuke Nakajima3, Masaki Ishiwatari2, Takeshi Imamura4, Yoshi-Yuki Hayashi5 (1.National Institute of Technology, Matsue College, 2.Department of Cosmoscience, Graduate School of Science, Hokkaido University, 3.Department of Earth and Planetary Sciences,Flculty of Sciences,Kyushu University, 4.Graduate School of Frontier Sciences, The University of Tokyo, 5.Department of Planetology, Graduate School of Science, Kobe University / Center for Planetary Science (CPS))

Keywords:Venus atmosphere, convection, cloud formation, numerical modeling

Although convection has been suggested to occur in the lower part of Venus' cloud layer by some observational evidences, its structure remains to be clarified. In the previous studies, Baker et al. (1998, 2000), Imamura et al. (2014), and Lefevre et al. (2017) try to simulate Venus' cloud-level convection, but their models they utilized do not consider cloud formation process. Our purpose is to develop new cloud formation scheme and to perform numerical simulation using the scheme in order to investigate a possible structure of Venus' cloud-level convection and clouds distribution.

Our cloud formation scheme is based on Imamura and Hashimoto (1998). The number densities of sulfuric acid (H2SO4) and water (H2O) in the gas and liquid phases are calculated. Sedimentation of H2SO4-H2O solution droplets and chemical reactions of sulfuric acid are also considered. The scheme is implemented into our convection resolving model developed by Sugiyama et al. (2009). The model is based on the quasi-compressible system (Klemp and Wilhelmson, 1978), and is used in the simulations of the atmospheric convections of Jupiter (Sugiyama et al., 2011, 2014) and Mars (Yamashita et al. 2017).

In our poster, we will show the details of our cloud formation scheme and demonstrate some results of our calculation using similar settings of Imamura et al. (2014).