A study by researchers from the Institute of Astrophysics of Andalusia (IAA-CSIC) and published in the Journal of Geophysical Research – Atmospheres has confirmed the existence of cold electrical discharges within the clouds. They differ from hot ones, which form rays, in temperature and color blue of its flashes.

This new atmospheric phenomenon was first detected in the 1980s and records radio emissions or events (narrow bipolar events or NBE) from bipolar clouds (with clear rises and falls in radio pulses), depending on informs the SINC Agency.

The unknown was so far in where did these bipolar pulses come from. The research carried out by the Atmospheric Electricity Group (TRAPPA) of the Institute of Astrophysics of Andalusia has solved this question by simultaneously detecting, for the first time, blue flashes and pulsed bipolar emission on radio from storm clouds.

Image of the study where the cold electric discharges of blue color are seen

It was concluded that it was natural cold electric shocks due to lack of brightness in the typical range of rays. These discharges form in storm clouds, just as the researchers expected.

“Specifically they would be corona-type discharges (they have this luminous halo appearance), which when studied in the laboratory are characterized by their filamentous appearance and bluish color (they emit in blue and near ultraviolet), and which are also produced in everyday conditions, such as in power lines high voltage or lightning rods ”, explains Francisco J. Gordillo Vázquez, IAA researcher who coordinates the study.