Solar Storms Trigger Short-Term Weather Changes on Earth, Study Finds
Solar storms, long known for disrupting satellite signals and power grids, have now been shown to have a wider impact on weather conditions on Earth. Recent research indicates that intense solar activity can trigger atmospheric changes within a short period — even within hours to a day.
The findings, published in the journal Geophysical Research Letters, are based on an analysis of 67 years of space weather data. Joachim Raeder, a researcher at the University of New Hampshire, found a consistent correlation between the strength of solar storms and changes in regional weather patterns on Earth.
“The severity of these effects is closely linked to the intensity of the solar storm itself and can vary depending on regional factors,” said Raeder, as quoted by The Independent on Wednesday (22 July).
In his study, Raeder highlighted regions such as the Rocky Mountains in the United States and Hudson Bay in Canada, which experienced reduced rainfall and snowfall following increased solar activity. This phenomenon is believed to occur because radiation from solar eruptions enters the atmosphere through the polar vortex.
Although they do not create new weather patterns, solar storms are believed to modify the characteristics of existing weather. This includes changes in air pressure systems, precipitation distribution, and temperature fluctuations in certain regions. High-energy charged particles from the Sun are thought to be the driving force behind these changes.
The Sun is currently entering the peak of its 11-year activity cycle, meaning geomagnetic storms will occur more frequently. Raeder stressed the importance of incorporating solar activity variables into future weather forecasting models to improve prediction accuracy.
Nevertheless, researchers caution that solar activity is not the sole factor determining global weather. Conventional factors such as ocean circulation and climate change remain the dominant influences, whilst solar storms act as an additional factor affecting the atmosphere in the short term.