Fall is magical with vivid colours. But recent studies have shown that fall is appearing behind schedule as a result of climate change. Several parts of the world have experienced the warmest Octobers on record. Apart from increase in temperature, lack of precipitation, prolonged droughts and insect infestations affect the autumn period.
During spring and summer leaves produce chlorophyll which capture sunlight to generate sugars and carbohydrates upon which the trees grow and survive.
When temperature drops and days grow shorter during autumn, trees end the chlorophyll production as well as nutrient absorption. This helps them to prepare for winter as the cold snap kills the leaves.
This final stage of leaf development leading up to shedding is known as leaf senescence.
Climate change has jeopardised the autumn season in following way- Trees are experiencing longer growing periods with shorter transition times between warm days and cold frosts. Due to this, they may not have a chance to finish absorbing the sugars as well as carbohydrates that remain in their green leaves before the first winter frost. This could in turn impact how well a tree grows in the following spring.
Since forests absorb carbon dioxide emissions, if their health dwindles, so will their climate benefits. Admiring fall foliage is a good opportunity for people to reflect on these changes. Sharing few pictures of glorious autumn colours.
