Japan Geoscience Union Meeting 2019

Presentation information

[E] Poster

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

[P-PS05] Recent advances of Venus science

Mon. May 27, 2019 5:15 PM - 6:30 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-P12] Possibility of electric discharge in the Venusian atmosphere due to the super-rotation of clouds

*Adhithiyan Neduncheran1, Ugur Guven1,2, Ananyo Bhattacharya3 (1.University of Petroleum and Energy Studies, India, 2.United Nations Centre for Space Science and Technology Education in Asia and the Pacific, 3.Sardar Vallabhbhai National Institute of Technology,India)

Keywords:Venus , Super-rotation, lightning, electric discharge, atmosphere

Several evidences of electromagnetic bursts were measured by various landers and orbiters studying Venus atmosphere (Venera landers, Venus Express and the Pioneer Venus Orbiter). The electromagnetic bursts that are taking place in the cloud region in the form of lightning or fluorescence might be a result of momentum transfer, solar convection and charge dispersion in the clouds of Venus. While the lightning in Earth takes place mostly in the equatorial region, in case of Venus it is possible for lightning to occur in the polar regions, considering the kinetic energy transfer and the formation of dipoles in both hemispheres of Venus. The meridional and zonal flows can interact and cause the charge separation which possibly lead to electromagnetic bursts in different spectrum and in different regions in Venus. In labs, it is observed that SO2 emissions in UV region cause fluorescence which is one of the major phenomena taking place in the cloud tops. Based on the photochemical model published by Krasnopolsky 2011(doi:10.1016/j.icarus.2011.11.012) and the principle of refraction, we present the possibility of lightning/fluorescence phenomena being caused by the super-rotation of the clouds in the Venusian atmosphere.