建構台灣森林經營參考水平

Abstract

2010年通過之坎昆協議(Cancun Agreement)決議文第2/CMP.6號，要求附件一國家向聯合國氣候變化綱要公約秘書處遞交森林經營參考水平(forest management reference level，FMRL)，以做為第二承諾期森林經營活動的基線，高於參考水平的碳儲存量始被視為碳匯。森林經營參考水平共有6個基本組成因素，用以確保估算工作的準確度和透明度，報告國會以國內現況對組成因素進行說明；參考水平報告書的基本架構分為五大部分，用以記述估算過程和使用方法以及預測未來情況的影響因子。本研究參考各國估算方法及過程，使用林業統計中數據為台灣建立2012至2020年的森林經營參考水平。在二種不同的森林年生長量假設下，年蓄積量為0.17 m3/ha的林地碳貯量為-116 Kt CO2eq，而將年生長量設為5.70 m3/ha的情況下則為-4,899 Kt CO2 eq；以此結果加上收穫林產品碳庫之延遲排放碳量約為-7 Kt CO2 eq，二假設法估算的參考水平分別為-123和-4,906 Kt CO2 eq。

According to decision 2/CMP.6 in Cancun Agreement, each Annex I Party should submit their forest management reference level to the secretariat of United Nations Framework Convention on Climate Change. The reference level will be used as baseline of emissions and removals from forest management, which means the removals exceeding reference level can be regarded as carbon sink. There are six elements should be considered in the construction of reference level, which are used to reveal the circumstance of forest management and ensure the accuracy and transparency. The report of reference level are constructed in five parts, in order to describe the methods and the process of accounting and factors affect conditions of forest management in the future. After discussing different methodology used by Parties, this report construct Taiwan’s forest management reference level in 2012 to 2020 by using data from Forestry Statistics Yearbook. We suppose there are two circumstances, when assuming forest increment as 0.17 m3/ha/yr, the result of emissions from forest land will be -116 Kt CO2 per year, and -4,899 Kt CO2 since the forest increment is 5.70 m3/ha/yr. Besides forest land, harvested wood products is another carbon pool considered in reference level, and the result of accounting in Taiwan is -7 Kt CO2. Combining the accounting result of two assumption, Taiwan’s forest management reference level are -123 and -4,906 Kt CO2.