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Workshop proposal to ISSI Planetary Atmospheric Electricity

This workshop focuses on the generation and characteristics of electrostatic discharges in the solar system's planetary objects and their role in the global electric atmospheric circuit. Topics include lightning on planets, cosmic rays, charge separation, induced chemistry, and more. The workshop aims to enhance knowledge and encourage comparative studies on atmospheric electrification in various solar system objects. Proposed by renowned experts, it offers insights into outstanding problems and areas needing further exploration. The workshop is timely and relevant to space science, aligning with recent missions and future Earth missions like Taranis.

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Workshop proposal to ISSI Planetary Atmospheric Electricity

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  1. Workshop proposalto ISSIPlanetary Atmospheric Electricity

  2. WS General Theme Planetary Atmospheric Electricity on the solar system planetary objects: Generation and characteristics of electrostatic discharges in the solar system - Their role in the global electric atmospheric circuit What can be learned from our understanding of the Earth case?

  3. Topics • Review of the lightning on the solar system planetary objects: detected (the Earth, Jupiter, Saturn, Uranus), to be confirmed (Neptune, Venus), non-detected (Mars, Titan) and others? • Understanding of the electric general circuit of solar system planets • Role of the cosmic ray, magnetospheric electrons and surface radioactivity

  4. Topics (cont’d) • Formation of large electric field by charge separation (inductive or non-inductive charge transfer in the Earth thunderstorms, Mars dust charging, Titan charging by absorption of free charge...) • Convection pattern leading to large electric field (signature of atmospheric dynamics...) • Potential breakdown (dependency with respect to pressure and composition...)

  5. Topics (cont’d) • Induced chemistry (production of non-equilibrium trace organic constituents, Titan HCN production...) • Influence of the lightning on the magnetosphere • Electromagnetic waves (optical emissions, high frequency radio emission, very low frequency plasma waves...) • Ground based observations (LOFAR...) and Future space mission (Taranis...)

  6. Timeliness and relevance to space science • Recent Huygens mission highlights the possibility of lightning in Titan atmosphere • Venus Express may also address this question • A review on the main questions related to atmospheric electrification should also support the future Earth mission like Taranis (CNES)

  7. Scientific Relevance • Knowledge (models, observations) of the atmospheric planetary electrification of numerous solar system objects makes comparative studies very desirable and compelling • The workshop will also highlight outstanding problems and areas in which progress remains to be made

  8. WS Date & Structure • End 2006 - Early 2007 • 4.5 days, 4 talks/half day, plenary sessions, no splinter sessions, no working groups

  9. Proposed Convenors • J.P. Lebreton (ESTEC/ESA) • F. Leblanc (Service d’Aéronomie du CNRS/IPSL) • P. Zarka (Observatoire de Paris – Meudon) • K. Aplin (Rutherford Appleton Laboratory)

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