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。281Please respect copyright.PENANALnDUtd2U8E
281Please respect copyright.PENANAv6PQYqvrso
281Please respect copyright.PENANA5yLSYt40Dd
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。281Please respect copyright.PENANAsQat8NWudi
281Please respect copyright.PENANAnRk2Hl4yuX
(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。281Please respect copyright.PENANAie9m746t7A
281Please respect copyright.PENANAzd0GuSsXBy
281Please respect copyright.PENANAo9Rf1Dwjtv
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)。281Please respect copyright.PENANAZxdPG8QFiV
281Please respect copyright.PENANAO4aCFAKUbI
(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。281Please respect copyright.PENANAp9tOTRmG87
281Please respect copyright.PENANApqLzbKUHDC
281Please respect copyright.PENANAJ8hP9JgPW8
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。281Please respect copyright.PENANAHjHK0hqhsy
281Please respect copyright.PENANA8obWPYWkBQ
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。281Please respect copyright.PENANA8COlEKAyEF
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。281Please respect copyright.PENANARCt56uPJUT
281Please respect copyright.PENANAxspRuiF8rI
(圖4)圖中展示出兩種導致落葉情況發生的可能性。281Please respect copyright.PENANAmrHpghEpLj
281Please respect copyright.PENANAb2OZxA5y5u
281Please respect copyright.PENANAklk1hBHqwO
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。281Please respect copyright.PENANAEWvTAFkQW6
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。281Please respect copyright.PENANARtMH9trjWd
281Please respect copyright.PENANAF92jLV4LZn
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。281Please respect copyright.PENANAVLA2zjKoeE
281Please respect copyright.PENANAIFTCggTvYm
https://www.instagram.com/potatopigtongue/281Please respect copyright.PENANALsm6E6LOle
281Please respect copyright.PENANANita33wVcB
281Please respect copyright.PENANATwY4OLGAWu
Ref1:https://science.sciencemag.org/content/370/6520/1066?intcmp=trendmd-sci281Please respect copyright.PENANAlsBDkaKddJ