Exoplanet Detection via Saline Ionization: Ionic Atmospheres as Coherent Biosignatures

The search for life-bearing exoplanets has largely focused on the presence of liquid water. This paper advances a complementary and more discriminating criterion: planetary-scale saline ionization. Dissolved salts—particularly sodium chloride (NaCl)—enable sustained ion mobility, atmospheric charge exchange, and global electrochemical coherence. These processes generate detectable ionic and electromagnetic signatures that arise naturally from planetary chemistry and physics. Saline ionization provides a stable, scalable mechanism linking hydrosphere, atmosphere, and planetary electromagnetic systems. As such, it offers a practical and observationally accessible biosignature for identifying exoplanets capable of supporting complex, Earth-like life.

Exoplanets, Exoplanet Detection, Astrobiology, Biosignatures, Ionic Atmospheres, Saline Oceans, Sodium Chloride, NaCl, Planetary Ionization, Atmospheric Ionization, Planetary Coherence, Electrochemical Systems, Global Electric Circuit, Ionosphere, Charged Aerosols, Cloud Nucleation, Atmospheric الكهرباء, Electromagnetic Coupling, Planetary Magnetism, Ionic Convection, Hydrosphere–Atmosphere Coupling, Climate Stability, Weather Systems, Planetary Physics, Surface Conductivity, Atmospheric Conductivity, Habitability Criteria, Life Detection, Rocky Planets, Ocean Worlds, Salt Aerosols, Electrochemical Gradients, Coherent Energy Systems, Planetary EM Fields, Astrophysics, Space Science, Comparative Planetology, Geochemical Cycling, Atmospheric Dynamics, Ionic Signatures, Spectroscopy, Remote Sensing, Planetary Systems, Solar–Planet Interaction, Cosmic Energy Coupling, Earth Analog Planets, Coherent Biospheres