Assessing economic benefits and costs of carbon sinks in boreal rotation forestry

IF 4 2区 农林科学 Q1 ECONOMICS Forest Policy and Economics Pub Date : 2024-06-26 DOI:10.1016/j.forpol.2024.103249
Vesa-Pekka Parkatti , Antti Suominen , Olli Tahvonen , Pekka Malo
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Abstract

We study the optimal enhancement of forest carbon sinks via forest management changes in boreal even-aged Scots pine (Pinus sylvestris) forests. The economic–ecological stand-level optimization model integrates a statistical–empirical individual-tree growth model with a comprehensive model for carbon in living trees, wood products, and soil. We use reinforcement learning to optimize for rotation length, thinning timing, and thinning intensity. Carbon dioxide (CO2) pricing has a notable effect on the optimal solutions and on the corresponding CO2 flows and carbon stocks. Under a 1% interest rate, increasing the CO2 price from zero to €100 increases the discounted carbon sink by 83% and the total steady-state carbon stock by 122%. Increasing the CO2 price decreases the economic significance of thinning, and, with a high enough CO2 price, the stand is harvested only with clear-cuts, which are further postponed by CO2 price increases. Decreasing stand volume or total C stock cannot be taken as a sign of an overly mature stand. Depending on the CO2 price and interest rate, the economic benefit–cost ratio of additional carbon sinks via forest management changes varies between 1.9 and 3.7. Overall, the results reveal a high potential to increase the role of boreal managed forests in climate change mitigation.

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评估北方轮伐林碳汇的经济效益和成本
我们研究了北方偶龄苏格兰松()森林碳汇森林管理变化的优化提升。经济-生态林分级优化模型将统计-经验个体树木生长模型与活体树木、木制品和土壤中的碳综合模型整合在一起。我们利用强化学习来优化轮伐长度、间伐时间和间伐强度。二氧化碳(CO)定价对最优解以及相应的二氧化碳流量和碳储量有显著影响。在利率为 1%的情况下,二氧化碳价格从零增加到 100 欧元,贴现碳汇增加了 83%,稳态总碳储量增加了 122%。二氧化碳价格上涨会降低间伐的经济意义,在二氧化碳价格足够高的情况下,林地只能进行净伐,而净伐又会因二氧化碳价格上涨而进一步推迟。林地面积或总蓄积量的减少不能被视为林地过于成熟的标志。根据二氧化碳价格和利率的不同,额外碳汇森林管理变化的经济效益成本比在 1.9 到 3.7 之间。总之,研究结果表明,提高北方管理林在减缓气候变化方面的作用具有很大潜力。
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来源期刊
Forest Policy and Economics
Forest Policy and Economics 农林科学-林学
CiteScore
9.00
自引率
7.50%
发文量
148
审稿时长
21.9 weeks
期刊介绍: Forest Policy and Economics is a leading scientific journal that publishes peer-reviewed policy and economics research relating to forests, forested landscapes, forest-related industries, and other forest-relevant land uses. It also welcomes contributions from other social sciences and humanities perspectives that make clear theoretical, conceptual and methodological contributions to the existing state-of-the-art literature on forests and related land use systems. These disciplines include, but are not limited to, sociology, anthropology, human geography, history, jurisprudence, planning, development studies, and psychology research on forests. Forest Policy and Economics is global in scope and publishes multiple article types of high scientific standard. Acceptance for publication is subject to a double-blind peer-review process.
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