The impact of carbon dioxide on climate change may have been overstated, with solar activity giving a better explanation of changes in the Earth's temperature, according to Chinese scientists.
A new paper published in the Chinese Science Bulletin has found a "high correlation between solar activity and the Earth's averaged surface temperature over centuries," suggesting that climate change is intimately linked with solar cycles rather than human activity.
The paper, written in Chinese, says that there is also a "significant correlation" between solar activity over the past century and an increase in Earth's surface temperatures over the same period. The correlation between solar activity and water temperature is even higher than the correlation between solar activity and land temperature.
The paper, by Dr Zhao Xinhua and Dr Feng Xueshang, adds that a peer-reviewer said the results "provide a possible explanation for the global warming".