網文提到 : ..... In addition, measurements of deep ocean temperature rises, which enable estimates of how fast heat and carbon dioxide are removed from the atmosphere and transferred to the ocean depths, imply lower transfer rates than previously estimated.
CO2的急升是人類活動導致的。
我們排放了多少CO2其實多少都有個粗略的估計的。這個排放量（有沒有數據？）可以解釋大氣中上升的CO2量。參考mca10#的圖，以比較溫度與大氣CO2的關係以估計海洋吸/放CO2以致大氣中CO2的改變程度（例如x=125, conc. of CO2遠低於現時水平）。如果不是人類活動，又是甚麼原因導致？
FAQ 也提供了以下線索 ---- “…… Careful analysis of the atmospheric CO2 data collected by Scripps and other organizations shows that CO2 is increasing at a rate that is about 44% slower than would be expected if all the CO2 from the burning of fossil fuels stayed in the air. The real puzzle is to explain where the missing 44% of the emissions have gone. The answer is that this "missing" CO2 is absorbed by both the oceans and the terrestrial biosphere. On average over the last 50 years the oceans and the terrestrial biosphere have continued to "mop up" this amount of CO2. Whether they will continue to do this as atmospheric CO2 concentrations continue to increase is a critical question and the subject of intense international research…….”
你可以沿著 FAQ 的線索，上網找一些每年全球消耗能源的統計，自己做點研究將它轉為 CO2 的年產量，相信會更深入了解這個「不願面對的真相 」(借用戈爾的書名)。
Milankiovick cycles 是百年前提出來的東西，原意是希望知到冰河時期是否會重覆出現，不是用來計算大氣 CO2 含量與年代的關係，那年代沒有大氣污染的問題，沒有採探 ice core 的能力，也無可靠技術去測量 CO2 ppm，將 CO2 ppm 與 Milankiovick 掛勾是講不通的，現在我們說的 400,000 年前 大氣 CO2 有多少多少 ppm，全是靠現代技術 ( Dr. David Keeling 是最大貢獻者) + ice core 樣本分析而來，根本不是 Milankiovick cycles 的原裝內容，所以在討論中，我一直避免以 Milankiovick cycles 為理據重點，不過我認為 Milankioick 導出的三個天文周期 (見以前貼文) ，整體概念是有道理的，至於這些周期有多準，我猜科學界仍在研究中。
Andy's original question: 大氣自動調節? 陳生相信
全球氣温上升不足懼
樹木會防止温度過大
那是根據什麼
樹木真有能力將全球co2降低至危險程度以下?
Wales 於 2009-5-23 23:24 發表
Andy問的是：
溫度&CO2量上升-->光合作用速率上升，
能否平衡急升的CO2量？
It is debatable whether the photosynthesis rate will increase with increase in temperature AND carbon dioxide concentration but it is definitely known that most plant can live only within a certain temperature range. If the temperature becomes "too hot", the plant just dies instead of grows
The life process is consisting of many complicated and orchestrated chemical reactions "catalyzed" by enzymes. Unlike simple chemical reactions that have faster rate at higher temperature, Enzyme "catalyzed" reactions will work only under specific temperature ranges. Almost all enzymes are protein based and the structure of protein is very sensitive to temperature. Without the correct structure, the enzyme just does not work.
發表於 2009-5-23 00:57:33
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發表於 2009-5-23 23:24:06
