台灣地區木質材料消費之碳流動與貯存量研究

Carbon Flows and Stocks from Consumption of Wood Materials in Taiwan

林俊成(Jiunn-Cheng Lin) ； 李國忠(Kouchung J. Lee)

《台灣林業科學》 18卷4期 (2003/12) Pp. 293-305

https://doi.org/10.7075/TJFS.200312.0293

摘要

本研究目的應用大氣流動法及貯量改變法，估算台灣地區木質材料消費與林產品使用之碳流動與貯存效果。所得主要結果如下：l.應用大氣流動法及貯量改變法，估算台灣地區木質材料消費與林產品使用之碳流動與貯存效果。使用大氣流動法，估算木質材料消費和林產品的使用而流動到大氣的碳量，1990年時流動到大氣的碳量為2.29×10^7t，1999年時為2.27×10^7t。以1999年為例，因木質材料消費和林產品使用而流動到大氣的碳量比例，主要來自市場上使用林產品，占碳流動量的44.96%，其次為生產過程中的廢料產出，占碳流動量的41.31%，及林產品短時間使用而流動，占碳流動量的12.50%。使用貯量改變法分析木質材料消費和林產品使用的碳貯存改變量，1990年時碳貯存改變量為0.13×l0^7t的碳量，1999年時為-0.09×10^7t的碳量。2.比較台灣地區因木質材料消費與林產品生產使用而流動到大氣中碳量與石化能源燃燒的碳排放量，木質材料消費與林產品生產使用而流動到大氣中碳量約為石化能源燃燒的碳排放量的7.46%。比較台灣地區因木質材料消費與林產品生產使用而流動到大氣中碳量與約為森林年碳吸存量的37.55-47.26%。經由敏感度分析結果，生產過程所消耗（殘留物、廢材）等廢料的產出量與林產品的使用年限，對計量結果有較大的影響。因此，木質材料消費及林產品使用之碳減量策略，可由延長林產品使用年限、減少廢料產出量及加強廢料管理、生態材料的使用來著手。

關鍵字

大氣流動法 ； 貯量改變法 ； 木質材料 ； 林產品 ； 碳流動與貯存

並列摘要

The purposes of the study were to account for carbon flows and stocks based on consumption of wood materials and utilization of forest products using atmospheric flow and stock change methods. The major conclusions drawn from the study are as follows. 1. The effects of consumption of wood materials and utilization of forest products in Taiwan on the amounts of carbon flows and stocks were estimated by the atmospheric flow and stock change methods. According to the former method, the amount of carbon released into the atmosphere from the consumption of wood materials annually was 2.29×10^7t. The amount dropped to 2.27×10^7t in 1999. The main proportions of carbon released into the atmosphere from the consumption of wood materials and utilization of end-use products in 1999 consisted of 44.96% for wood products in use, 41.31% for wood wastes during manufacturing processes, and 12.50% for short-term wood products use. Based on the latter method, changes in carbon stocks due to the consumption of wood materials and utilization of end products was 2.29×10^7t of carbon in 1990 and -0.09×10^7t of carbon in 1999. 2. The amount of carbon released into the atmosphere from the consumption of wood materials and utilization of end products was about 7.46% of all carbon released from fossil fuel burning in Taiwan. This part of the emission was estimated to be between 37.55% and 47.26% of the amount of carbon sequestered by the forests of Taiwan annually. 3. Sensitivity analysis suggests that wood wastes from production processes of wood-based industries and the service lifetime of wood products are 2 major factors with greater influences on carbon changes. Thus, by extending the service lifetime of wood products, decreasing wood wastes from processing, enhancing waste management, and increasing the proportions of ecological materials (wood materials) in use may help lower overall carbon emissions.

並列關鍵字

atmospheric flow method ； stock change method ； wood material ； wood product ； carbon flow and stock