時空の旅わくわく日記

日、上野恩賜公園、東京都）

　上野恩賜公園に紅葉しているもみじがありました。常に紅葉しているもみじかもしれませんが、これまで気づいたことがありませんので、なんとなく、不思議です。

I would like to know the reason why the leaves of this maple tree have already turned red. I was surprised to see autumn leaves in spring at Ueno Park in Taito Ward, Tokyo.

【 Bon appétit ! 】
For example, an early April heat wave triggered rapid leaf and flower development,” said Wilmot. But it was spring, after all; the heat wave faded and cold air returned. “Leaf development stalled and the partially emerged leaves had to withstand several weeks of cold.” This can be very dangerous for tender young leaves, and, as it turns out, it might explain those springs when there is more red than green in the canopy. And, get this: all that red may actually help protect those vulnerable young leaves.
（ https://northernwoodlands.org/articles/article/why_do_leaves_in_spring_sometimes_appear_more_red_than_green ）