科普專欄–薯不揀單 - 三十秒科學–海洋溫度正循著上升還是下降的趨勢？

極端氣候開始陸續浮現，人為及自然因素相信均有份參與。在這層面上，我們有沒有辦法可以得知以往的氣候變化又是如何呢?528Please respect copyright.ＰＥＮＡＮＡ7tnGBSXiKd
528Please respect copyright.ＰＥＮＡＮＡvUzAoHRg0T
本篇將會探討一下測量地球海洋溫度轉變的其中一一道辦法。528Please respect copyright.ＰＥＮＡＮＡcQtPUUWjhA
528Please respect copyright.ＰＥＮＡＮＡjuFyjcl3qF
528Please respect copyright.ＰＥＮＡＮＡfsjwXhs6rT
528Please respect copyright.ＰＥＮＡＮＡwOQ5hNbGWb
（圖2）二氧化碳是由一個碳原子(C)及兩個氧原子(O)而組成。528Please respect copyright.ＰＥＮＡＮＡOVTZww7FYJ
528Please respect copyright.ＰＥＮＡＮＡz16sgsp72f
528Please respect copyright.ＰＥＮＡＮＡh3zARBY3IJ
用沒有讀過理科的角度來觀看，碳原子在自然界會以12C、13C及其他形式的狀態呈現，其中以12C呈現的方式佔大多數，達98.89%。而13C的比例則為1.11%。528Please respect copyright.ＰＥＮＡＮＡvLI7tHqt29
528Please respect copyright.ＰＥＮＡＮＡRy6MdpkAXJ
氧原子亦是同一道理，在自然界會以16O、18O及其他形式的狀態呈現。528Please respect copyright.ＰＥＮＡＮＡ4fD8Zub2XA
528Please respect copyright.ＰＥＮＡＮＡPxZQJHuU9X
整個情形就像是明治香蕉朱古力一樣，雖然同是香蕉狀，但有極少數的朱古力會以黃金香蕉的方式呈現。528Please respect copyright.ＰＥＮＡＮＡMT8Q782qan
528Please respect copyright.ＰＥＮＡＮＡS0aaT8Ak5I
（圖3）位於深海的有孔蟲(Foraminifera)的外殼含有CaCO3物質。它們會與水產生反應，因而交換氧原子的呈現方式。528Please respect copyright.ＰＥＮＡＮＡx81PQgkbsA
528Please respect copyright.ＰＥＮＡＮＡEpBvseY1gX
528Please respect copyright.ＰＥＮＡＮＡeCfYxpDYIV
非常重要的是，這反應會隨著溫度提升而加速進行。528Please respect copyright.ＰＥＮＡＮＡ2AWhyRjDHW
528Please respect copyright.ＰＥＮＡＮＡAQOHttMAHk
亦即是說，溫度越高的話，越多有孔蟲外殼的CaCO3物質會以18O的方式呈現。528Please respect copyright.ＰＥＮＡＮＡihfkhMhFDR
528Please respect copyright.ＰＥＮＡＮＡ07Va5PVWsp
（圖4）科學家透過測量不同年代的孔蟲化石外殼的氧原子狀態，從而推論出不同時代的海洋溫度。528Please respect copyright.ＰＥＮＡＮＡoNRlEL1ciy
528Please respect copyright.ＰＥＮＡＮＡP588BQYYXJ
528Please respect copyright.ＰＥＮＡＮＡtyUkiLApcf
從圖中可見，海洋的溫度正呈著不斷下降的趨勢。528Please respect copyright.ＰＥＮＡＮＡLpetbW0BYR
528Please respect copyright.ＰＥＮＡＮＡI81SavQ3y6
海洋溫度會影響大海吸收二氧化碳的能力及內裡的生物鏈，而海洋溫度正不斷下降，究竟是好還是壞呢？528Please respect copyright.ＰＥＮＡＮＡK5Qg4uE69q
528Please respect copyright.ＰＥＮＡＮＡ5lI6cVvdVA
528Please respect copyright.ＰＥＮＡＮＡZYqZBmgL27
528Please respect copyright.ＰＥＮＡＮＡAypUjZcQzW
如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。528Please respect copyright.ＰＥＮＡＮＡjyxI3Aqo9I
528Please respect copyright.ＰＥＮＡＮＡu0eT3QpdxO
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc528Please respect copyright.ＰＥＮＡＮＡKmBcECJKvG
528Please respect copyright.ＰＥＮＡＮＡCV5puyzlqh
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。528Please respect copyright.ＰＥＮＡＮＡN0LwodCK5n
528Please respect copyright.ＰＥＮＡＮＡKeoJLoKt4j
Link:528Please respect copyright.ＰＥＮＡＮＡVP28993mtm
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio528Please respect copyright.ＰＥＮＡＮＡYc5Qv3UcFb
528Please respect copyright.ＰＥＮＡＮＡrlpsR9Wbkc
528Please respect copyright.ＰＥＮＡＮＡgCQamWNGTT
除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。528Please respect copyright.ＰＥＮＡＮＡaGpb8kRVtP
528Please respect copyright.ＰＥＮＡＮＡzKW8QPXmy3
Ref1:https://www.ldeo.columbia.edu/~peter/Resources/Seminar/readings/Ravelo%20&%20Hillaire-Marcel.2007.pdf528Please respect copyright.ＰＥＮＡＮＡjOJgR79Upp
Ref2:https://science.sciencemag.org/content/371/6534/1148528Please respect copyright.ＰＥＮＡＮＡkKBswerLS1

ns216.73.216.190da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章