陽光、二氧化碳及水份充足情況下,光合作用在樹葉裡頭發生,二氧化碳的碳原子將儲存在樹木裡,並釋出氧氣。577Please respect copyright.PENANAYU9ln4NnK2577Please respect copyright.PENANAPytgGSrIC3
577Please respect copyright.PENANAOs8AhdIeuS
秋天時份,溫度驟降,樹木意識到冬天即將來臨,便啟動落葉機制,以免冬天低溫為樹葉帶來傷害。577Please respect copyright.PENANAvHFRkFBTWB
577Please respect copyright.PENANArTwUEjYQ2G
(圖2)根據這個理念,全球氣侯所導致的溫度提升,將會使綠葉時間延長1-3星期。577Please respect copyright.PENANAhkTBiTEsEb577Please respect copyright.PENANAk78dyRI2hN
577Please respect copyright.PENANAUIeU8qj2Dl
但出乎意外的是,實驗及現實證據指出,綠葉時間反而是平均縮短了3-6日(Ref1)。577Please respect copyright.PENANAefYKqlpazY
577Please respect copyright.PENANArPNN4145Ls
(圖3)分析由1948-2015年達434,226項的樹木數據再加上各種實驗,科學家得出以下的解釋。577Please respect copyright.PENANADpkcMiVnAm577Please respect copyright.PENANAJxOKg6k5W6
577Please respect copyright.PENANAzG1xamdKPP
全球變暖再加上大氣二氧化碳含量上升,樹木的光合代謝率亦因而有所提升。577Please respect copyright.PENANAjj2SIWMOnh
577Please respect copyright.PENANAPPAzFYv9pP
光合代謝的過程中,二氧化碳的碳原子會以固體方式儲存在榭木內。577Please respect copyright.PENANAzCl0nltkI8
如果固體碳原子到達一定的程度,就算溫度和暖,亦會觸發樹葉變黃及落葉發生。577Please respect copyright.PENANA4MiJjKlLa2
577Please respect copyright.PENANARR9o3tdz71
(圖4)圖中展示出兩種導致落葉情況發生的可能性。577Please respect copyright.PENANADsOm6Rd1k6577Please respect copyright.PENANAc8pMMhxYu3
577Please respect copyright.PENANAUfb3yHudQC
這表示出每一棵樹木均有其轉化二氧化碳至氧氣的限額,並不能夠無窮無盡地吸收二氧化碳。577Please respect copyright.PENANAIyptfzvwiN
單純依靠種植樹木意圖來改善全球的氣候變化,實際上亦有一定的限制。577Please respect copyright.PENANADKJgEbg4s2
577Please respect copyright.PENANAYP6o150pmN
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。577Please respect copyright.PENANAW9f9IZU1YD
577Please respect copyright.PENANAvXlUUilZQs
https://www.instagram.com/potatopigtongue/577Please respect copyright.PENANA4JylDFlm97
577Please respect copyright.PENANAkEyXz7vFKO
577Please respect copyright.PENANAEc16qAztVW
Ref1:https://science.sciencemag.org/content/370/6520/1066?intcmp=trendmd-sci577Please respect copyright.PENANADjPdRYZMY4