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Sun fuels debate on climate change

By Gerry Byrne

12 April 2003

IS THE Sun contributing to global warming? It’s a simple but crucial question and, despite making detailed measurements of the Sun’s brightness for more than two decades, researchers are still arguing over the answer.

In the latest instalment of the controversy, solar astronomer Judith Lean of the Naval Research Laboratory in Washington has attacked claims that the Sun is getting hotter. There has been no overall change in the Sun’s output, she told the UK/Ireland National Astronomy Meeting in Dublin.

Her main adversary, Richard Willson of the Institute of Climate Research at Columbia University, California, created headlines last month when…

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