How to forecast the weather with green bar trees in Dinglong Village, Xincheng County, Guangxi Zhuang Autonomous Region?

There is a green bar tree in Dinglong Village, Xincheng County, Guangxi Zhuang Autonomous Region, China, with the age of 100. The color of its leaves changes with the weather. On sunny days, the leaves are dark green. After a long drought, the leaves turn red; When the weather cleared up after the rain, the leaves returned to their original dark green. So people call it "weather tree".

This kind of Qinggang Tree is very sensitive to climate change in the process of adapting to the living environment for a long time. Before the drought is about to rain, there are often sultry and sunny weather. At this time, the synthesis of chlorophyll in leaves is inhibited, while the synthesis of anthocyanin is accelerated and dominant in leaves, so leaves turn from green to red.

When the rain, drought and strong light eased, the synthesis of anthocyanins was inhibited again, which accelerated the synthesis of chlorophyll, making chlorophyll dominant again, so the leaves returned to the original dark green.