重新湿润农用泥炭地可在国家一级提供具有成本效益的温室气体减排措施

IF 6 1区 社会学 Q1 ENVIRONMENTAL STUDIES
Jari Niemi, Tuomas Mattila, Jyri Seppälä
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引用次数: 0

摘要

要在 2050 年前实现欧盟的碳中和目标,就必须减少土地使用部门的排放量。在欧盟和芬兰,农用泥炭地的温室气体排放量占耕地排放量的一半。农用泥炭地温室气体排放量高的主要原因是深层排水导致泥炭有氧分解后的二氧化碳排放,而研究表明,提高地下水位有可能减缓分解过程。在此,我们研究了在芬兰农用泥炭地的现有土地利用基础上实施控制排水、棕榈栽培、泥炭地恢复和植树造林的减排潜力和成本。我们设定了三种情景,即在耕种过的有机土壤上增加湿田使用量,并估算了它们对国家温室气体排放和农民收入的影响。与芬兰的现状相比,不同情景下的年减排量从 0.3 到 5.0 兆吨二氧化碳当量不等。减排性土地利用对农民收入产生了负面影响,应予以补偿。假定政府补偿农民的收入损失,每吨二氧化碳当量的减排成本在-4 至 45 欧元之间。复湿的单位面积减排量最大,成本效益最高。我们的结论是,通过复湿农用泥炭地可以实现大幅减排。与欧盟排放交易体系中的平均碳价格或芬兰的碳捕集与封存技术成本相比,减排成本并不昂贵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rewetting on agricultural peatlands can offer cost effective greenhouse gas reduction at the national level

To reach EU’s carbon neutrality target by 2050, emission reductions in the land-use sector are needed. Agricultural peatlands attribute for half of the greenhouse gas emissions of cropland in both in EU and Finland. High greenhouse gas emissions from agricultural peatlands are primarily caused by CO2 emissions following aerobic peat decomposition due to deep drainage, and studies have shown that raising water-table has potential to slow down the decomposition process. Here we studied the emission reduction potential and cost of implementing controlled drainage, paludiculture, peatland restoration and afforestation to current land use on agricultural peatlands in Finland. We created three scenarios with increasing amount of wet field use on cultivated organic soils and estimated their effects on national greenhouse gas emissions and farmers’ income. The yearly emission reduction ranged from 0.3 to 5.0 Mt CO2 equivalents in the different scenarios compared to the current state in Finland. Emission reductive land use had a negative impact on the farmers income, which should be compensated. Assuming the government compensates the lost income for the farmers, the cost of emission reduction ranged from −4 to 45 € per ton of CO2 equivalents. Rewetting provided the most emission reduction per area and was the most cost effective. We conclude that substantial emission reduction is attainable by rewetting agricultural peatlands. The cost of emission reduction is inexpensive compared to average carbon price in European Union emission trading system, or to the costs of technical carbon capture and storage in Finland.

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来源期刊
Land Use Policy
Land Use Policy ENVIRONMENTAL STUDIES-
CiteScore
13.70
自引率
8.50%
发文量
553
期刊介绍: Land Use Policy is an international and interdisciplinary journal concerned with the social, economic, political, legal, physical and planning aspects of urban and rural land use. Land Use Policy examines issues in geography, agriculture, forestry, irrigation, environmental conservation, housing, urban development and transport in both developed and developing countries through major refereed articles and shorter viewpoint pieces.
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