Does a hot sum­mer trig­ger an early au­tumn?

Focus-Science and Technology - - Q & A - AN­THONY JONES, LV

Fruits and berries that we nor­mally as­so­ciate with au­tumn can ripen early dur­ing a hot sum­mer. But there are other au­tum­nal changes that are un­af­fected or even slowed by a long, hot sum­mer. Leaves won’t lose their green colour un­til the nights start to get chilly, be­cause cold tem­per­a­tures are needed to break down the chloro­phyll pigment. Also, birds de­cide when to mi­grate south for the win­ter by the short­en­ing day length, not the weather.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.