臺灣博碩士論文加值系統

由於過量的人造溫室氣體排放，全球正積極制訂法規希望減緩氣候變遷的速率，其中森林扮演著相當重要的角色，對森林所提供的碳吸存貢獻給予碳價格給付為一重要的政策方向。然而僅考慮實質碳吸存效益是不夠的，因森林的低地表反照率特性可能使地球吸收更多熱能，而森林所吸收的能量有部份會轉存為化學能，並不完全以熱能型式散失。因此，本研究模擬在考慮森林的碳效益下，額外納入輻射能量收支等值碳量的影響，來探究杉木的最適輪伐期與林地期望值之變化。據本研究之實證結果，若存在碳價格機制，隨著碳價格的增加，最適輪伐期會延長，林地期望值也會上升，若再加上輻射能量收支等值碳量的影響，則最適輪伐期會稍微縮短，抵減森林部份的固碳作用，針對「僅有木材收益」、「木材+碳效益」、「木材+碳效益+輻射能量收支等值碳量」三種情境下之最適輪伐期(T、Tcs、Ttecs)做比較，其關係為：Tcs≥Ttecs≥T。

International efforts strife to mitigate negative externalities caused by man released greenhouse gasses. Attributing an economical value to forest carbon sequestration might represent is an important strategy to achieve such goals. Such a policy is likely to impact optimal rotation periods in forestry management. However accounting for carbon sequestration alone is not sufficient; the lower surface albedo of forests compared to converted land causes a higher grade of heat absorption, which negatively affects the policy value of forests. Yet due to photosynthesis not all of absorbed energy is converted to heat but partially used as chemical energy.
This thesis discusses the optimum rotation periods and land expectation values of cunninghania lanceolata, under the impact of carbon sequestration and the mentioned radiation budget. This is achieved by comparing three scenario: “just a timber (T),” “timber + carbon benefits (Tcs),” and “timber + carbon + carbon equivalent of radiation budget (Ttecs)”. The findings suggest that in the presence carbon sequestration pricing, the optimal rotation periods and land expectation values ought to increase proportionally to carbon prices and that the relation among optimal rotation periods will be Tcs≥Ttecs≥T (in case the ratio of carbon release is 1).

第一章 緒論 1
第一節 研究背景 1
第二節 研究動機 4
第三節 研究目的 6
第四節 研究方法 7
第二章 文獻回顧 8
第一節 森林的二氧化碳吸存量研究 8
第二節 森林的最適輪伐期研究 9
第三節 反照率效果(The Albedo Effect) 11
第三章 理論模型 14
第一節 The Faustmann Rotation (僅有木材收益) 14
第二節 森林最大多目標利用價值模型 16
第四章 實證分析 19
第一節 實證樹種介紹 19
第二節 變數設定與估計 20
第三節 實證模擬結果與分析 27
第五章 結論與建議 33
參考文獻 35
附錄 40

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