Source: Aalto University
Summary:The study of the Sun’s long-term variation over a millennium by means of super computer modelling showed that during a time period of the Maunder Minimum type, the magnetic field may hide at the bottom of the convection zone.
The study conducted by the Aalto University Department of Computer Science, the ReSoLVE Centre of Excellence and the Max Planck Institute for Solar System Research seeks explanation for the mechanisms underlying the long-term variation in solar activity. The research team comprised Maarit Käpylä, Petri Käpylä, Nigul Olspert, Axel Brandenburg, Jaan Pelt, Jörn Warnecke and Bidya B. Karak. The recently published study was carried out by running a global computer model of the Sun on Finland’s most powerful super computer over a period of six months.
‘The Sun has an 11-year cycle that involves, among other things, the occurrence and disappearance of sunspots. The phenomena that occur in the Sun — including the cycle — change with time, so the solutions need to be integrated over time. Short-term variation is not interesting for the purposes of studying the space climate, for example,’ says Maarit Käpylä, head of the DYNAMO team, who conducts astroinformatics or computational astrophysics and data-analysis at the Department of Computer Science.
As a result of the computation carried out, currently the world’s longest numerical simulation was created that produces a solar-like dynamo solution complete with its long-term variation….READ MORE
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