都市樹木之固碳能力推估－以台北市大安森林公園為例

Carbon sinks potential of urban trees in Daan Park

林郁庭(YU-TING LIN)

指導教授 ： 邱祈榮

國立臺灣大學/生物資源暨農學院/森林環境暨資源學系/碩士(2022年)

https://doi.org/10.6342/NTU202203331

摘要

氣候變遷與全球暖化已成為國際間首要關注之重大議題，如何有效減排為全球共同面臨之挑戰。都市樹木於都市地區之二氧化碳減量扮演重要角色，然而其固碳能力尚未明瞭。本研究以臺北市大安森林公園為例，建立樹木生長推估模式，並推估都市樹木之碳儲存、碳吸存量。本研究建立樹木連年生長率迴歸式，其R2值大於0.7，可有效應用於樹木未來生長預測，若輔以定期複查，可進一步建立校正迴歸式，提高預測之有效性。2019年大安森林公園樹木之碳儲存密度介於39.49至65.84 ton C/ ha，總碳儲存量則界於1024.07至1707.30 ton C。2019至2021年大安森林公園樹木之年平均碳吸存密度界於1.16至2.55 ton C/ ha/ year，年平均總碳吸存量30.13至66.15 ton C/ year，換算為一年之二氧化碳吸存量則介於110.49至242.55 ton CO2e/ year。使用不同之推估公式及係數對於推估結果之影響甚大，未來進行都市樹木碳儲存與碳吸存量推估時，應審慎選擇推估方法與係數，以提升推估準確性。未來仍需進行更長期之生長監測，以及建立臺灣在地都市樹種資料，以期對於都市樹木固碳能力有更完善之推估。

關鍵字

都市樹木 ； 碳儲存 ； 碳吸存

並列摘要

Climate change and global warming have become major issues around the world, and how to reduce greenhouse gas emissions effectively is a common challenge facing the world. Urban trees play an important role in carbon dioxide reduction in urban areas, but their carbon sequestration capacity is not well understood. This study takes Daan Forest Park in Taipei City as an example to establish a tree growth estimation model and estimate the carbon storage and carbon sequestration of urban trees. In this study, a regression formula for the annual growth rate of trees was established, and its R2 value was greater than 0.7, which could be effectively applied to the future growth prediction of trees. If supplemented by regular review, a correction regression formula could be further established to improve the validity of the prediction. In 2019, the carbon storage densities of trees in Daan Forest Park ranged from 39.49 to 65.84 ton C/ha, and the total carbon storage ranged from 1024.07 to 1707.30 ton C. From 2019 to 2021, the annual average carbon sequestration density of trees in Daan Forest Park ranges from 1.16 to 2.55 ton C/ha/ year, and the annual average total carbon sequestration is 30.13 to 66.15 ton C/ year. The annual carbon dioxide sequestration is between 110.49 to 242.55 ton CO2e/year. The use of different estimation formulas and coefficients has a great impact on the estimation results. When estimating the carbon storage and carbon sequestration of urban trees in the future, the estimation methods and coefficients should be carefully selected to improve the estimation accuracy. In the future, longer-term growth monitoring and the establishment of local urban tree species data in Taiwan are still needed to better estimate the carbon sequestration capacity of urban trees.

並列關鍵字

urban trees ； carbon storage ； carbon sequestration

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