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。497Please respect copyright.PENANAnPTkKX0Oi0497Please respect copyright.PENANAtXtaVKPYlR
497Please respect copyright.PENANA1zqbohExex
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。497Please respect copyright.PENANAniAYpiANeY
497Please respect copyright.PENANA0KeB2oxuI9
(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。497Please respect copyright.PENANA3JbazUk9U0497Please respect copyright.PENANAzrbJztxMek
497Please respect copyright.PENANAjSeVgCJHWK
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)。497Please respect copyright.PENANAYpImYkP2qU
497Please respect copyright.PENANA0cLIKwclTU
(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。497Please respect copyright.PENANAZUd63ggVSN497Please respect copyright.PENANANVLqqaZEsN
497Please respect copyright.PENANAPdXr6I7rdU
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。497Please respect copyright.PENANAddyncq5szt
497Please respect copyright.PENANA7ShJNQEjXL
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。497Please respect copyright.PENANAT1q2K6vSDJ
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。497Please respect copyright.PENANAOiYrSeAUIS
497Please respect copyright.PENANAp5yZhn9mpU
(圖4)圖中展示出兩種導致落葉情況發生的可能性。497Please respect copyright.PENANAno4RHaGIXR497Please respect copyright.PENANAtMW6Li2zZ7
497Please respect copyright.PENANAcfZdkhLEAt
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。497Please respect copyright.PENANAanlILeRF7l
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。497Please respect copyright.PENANA0YJ4uESc6k
497Please respect copyright.PENANAUwdgiaj2Jm
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。497Please respect copyright.PENANAbyCWZRqXlB
497Please respect copyright.PENANAlpeuJJwi77
https://www.instagram.com/potatopigtongue/497Please respect copyright.PENANAjuNQzEYNL8
497Please respect copyright.PENANACIJptUAiAh
497Please respect copyright.PENANAZnJGPmql2e
Ref1:https://science.sciencemag.org/content/370/6520/1066?intcmp=trendmd-sci497Please respect copyright.PENANAXYZyEblOMH