A team of space weather experts from Northumbria University has been awarded more than £400,000 to explore how to better predict the conditions in near-Earth space.

The environment in the radiation belts 60,000km above the Earth can be highly dangerous—both to human life and to technology such as satellites launched into orbit.

However, the method currently used to predict when and where periods of high radiation might occur are based on average measurements, meaning scientists are unable to accurately forecast particularly dangerous events.

Professor Clare Watt, a space plasma physicist from Northumbria's Department of Mathematics, Physics and Electrical Engineering, is leading a new project which aims to find a way of forecasting space weather more accurately—something which would have huge economic benefits.

Funded by the Science and Technology Facilities Council (STFC), the project will combine spacecraft observations and samples of the atmosphere at different positions in near-Earth space, with numerical models which use that data to predict dangerous weather conditions.

Speaking about the research, Professor Watt said: "The near-Earth environment is so variable because our Sun is a magnetically variable star affecting both electromagnetic waves and high-energy particles in the area of space close to Earth.

The visible surface of the sun, or the photosphere, is around 6,000°C. But a few thousand kilometers above it—a small distance when we consider the size of the sun—the solar atmosphere, also called the corona, is hundreds of times hotter, reaching a million degrees celsius or higher.

This spike in temperature, despite the increased distance from the sun's main energy source, has been observed in most stars, and represents a fundamental puzzle that astrophysicists have mulled over for decades.

In 1942, the Swedish scientist Hannes Alfvén proposed an explanation. He theorized that magnetized waves of plasma could carry huge amounts of energy along the sun's magnetic field from its interior to the corona, bypassing the photosphere before exploding with heat in the sun's upper atmosphere.

The theory had been tentatively accepted—but we still needed proof, in the form of empirical observation, that these waves existed. Our recent study has finally achieved this, validating Alfvén's 80 year-old theory and taking us a step closer to harnessing this high-energy phenomenon here on Earth.