Photo: National Aeronautics & Space Adm / Globallookpress.com
NASA explained why lightning on Jupiter different from earth analogues and generate radio waves only in a limited frequency range. It turned out that thunderstorms occur most often at the poles of the gas giant, and it affects the imbalance of internal and coming from the sunlight heat. About it reports the edition Phys.org.
We know that all thunderstorms produce radio signals, but for nearly 40 years, lightning on Jupiter were detected either visually or just in the kilohertz range radio waves, but not in megahertz, typical of terrestrial discharges.
In 2016 of automatic interplanetary station Juno, studying the gas giant’s atmosphere in a polar orbit, recorded 377 discharges by means of a microwave radiometer capable of detecting electromagnetic waves of a wide range. These outbreaks gave rise to radio waves in the megahertz and gigahertz ranges which have proved their similarity with thunderstorms on Earth.
However, on Jupiter, almost all of the storm activity is localized at the poles, whereas on the Ground the lightning tend to occur on the equator. This is explained by the fact that tropical and Equatorial latitudes on Earth receive from the Sun more heat than the temperate and polar climate. The resultant warm moist air rises through convection, giving rise to frequent thunderstorms.
However, Jupiter receives from the Sun 25 times less heat than Earth, but at the same time, allocates a huge amount of inner heat energy. At the equator creates a balance between latest and incoming radiation, which prevents convection. At the poles the warm gases rise freely, creating conditions for heavy thunderstorms.
Video, photo All from Russia.