Setting priorities for land management to mitigate climate change

Böttcher H, Freibauer A, Scholz Y, Gitz V, Ciais P, Mund M, Wutzler T, & Schulze E-D (2012). Setting priorities for land management to mitigate climate change. Carbon Balance and Management 7 (5): 1-18. DOI:10.1186/1750-0680-7-5.

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Abstract

BACKGROUND: No consensus has been reached how to measure the effectiveness of climate change mitigation in the land-use sector and how to prioritize land use accordingly. We used the long-term cumulative and average sectorial C stocks in biomass, soil and products, C stock changes, the substitution of fossil energy and of energy-intensive products, and net present value (NPV) as evaluation criteria for the effectiveness of a hectare of productive land to mitigate climate change and produce economic returns. We evaluated land management options using real-life data of Thuringia, a region representative for central-western European conditions, and input from life cycle assessment, with a carbon-tracking model. We focused on solid biomass use for energy production.

RESULTS: In forestry, the traditional timber production was most economically viable and most climate-friendly due to an assumed recycling rate of 80% of wood products for bioenergy. Intensification towards "pure bioenergy production" would reduce the average sectorial C stocks and the C substitution and would turn NPV negative. In the forest conservation (non-use) option, the sectorial C stocks increased by 52% against timber production, which was not compensated by foregone wood products and C substitution. Among the cropland options wheat for food with straw use for energy, whole cereals for energy, and short rotation coppice for bioenergy the latter was most climate-friendly. However, specific subsidies or incentives for perennials would be needed to favour this option.

CONCLUSIONS: When using the harvested products as materials prior to energy use there is no climate argument to support intensification by switching from sawn-wood timber production towards energy-wood in forestry systems. A legal framework would be needed to ensure that harvested products are first used for raw materials prior to energy use. Only an effective recycling of biomaterials frees land for long-term sustained C sequestration by conservation. Reuse cascades avoid additional emissions from shifting production or intensification.

Item Type: Article
Uncontrolled Keywords: Carbon stock; Carbon sequestration; Carbon balance; Land management; Forestry; Agriculture; Bioenergy; Substitution; Regional modelling
Research Programs: Ecosystems Services and Management (ESM)
Bibliographic Reference: Carbon Balance and Management; 7:5 (16 March 2012)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:46
Last Modified: 23 Feb 2016 12:15
URI: http://pure.iiasa.ac.at/9993

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