Scientists have discovered new evidence that powerful solar storms may briefly affect Earth’s weather.
A new study suggests that after a large solar storm, some parts of North America experience less rain and snow for a short time.
The findings provide fresh clues about how activity on the sun may influence weather on our planet.
For many years, researchers have known that the sun can affect Earth’s atmosphere over its 11-year solar cycle.
However, those changes are usually small and happen over long periods. The new study found something different. It shows that strong solar storms may trigger noticeable weather changes within hours or days.
The research was led by Joachim Raeder, a professor emeritus of physics at the University of New Hampshire.
His study, published in Geophysical Research Letters, is the first to closely examine how weather changes immediately after a solar flare reaches Earth.
A solar flare is a powerful explosion on the sun that sends bursts of electromagnetic radiation and high-energy particles into space. When these particles reach Earth, they can disturb the planet’s magnetic field and create what scientists call a solar storm.
To investigate whether solar storms influence weather, Raeder analyzed 67 years of space weather records together with newly available atmospheric data. He used advanced computer models to search for unusual weather patterns that appeared after solar storms.
The results revealed a surprising connection. Areas such as the Rocky Mountains in the western United States and Canada’s Hudson Bay often experienced noticeable drops in rainfall and snowfall after a solar storm.
The study also found that the strongest solar storms occurring during summer or winter were more likely to reduce precipitation than storms happening in spring or autumn.
The researchers also looked at other weather conditions, including temperature, wind speed, air pressure and radiation. Although some changes were detected, they were less consistent and varied from place to place. Rainfall and snowfall showed the clearest pattern.
Scientists are still trying to understand exactly why this happens. One possible explanation is that radiation from solar flares enters Earth’s lower atmosphere through the polar vortex, a large region of cold, low-pressure air surrounding the North and South Poles. This pathway may allow energy from the sun to influence weather systems more directly than previously thought.
The new findings also challenge another popular idea that solar activity changes weather mainly by affecting cosmic rays, which may influence cloud formation. The researchers believe the polar vortex explanation could better match the patterns they observed.
Although this discovery is exciting, it will not immediately improve daily weather forecasts. More research is needed to confirm the results and understand the physical processes involved.
Even so, the study opens an important new area of research. If future studies confirm that solar storms influence weather, scientists may eventually include solar activity in climate and weather models.
This could improve long-term climate predictions and help researchers better understand the complex relationship between the sun and Earth’s changing atmosphere.
