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Time-dynamic effects on the global temperature when harvesting logging residues for bioenergy

Hammar, Torun and Ortiz, Carina and Stendahl, Johan and Ahlgren, Serina and Hansson, Per-Anders (2015). Time-dynamic effects on the global temperature when harvesting logging residues for bioenergy. Bioenergy Research. 8:4, 1912-1924
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Official URL: http://dx.doi.org/10.1007/s12155-015-9649-3

Abstract

The climate mitigation potential of using logging residues (tree tops and branches) for bioenergy has been debated. In this study, a time-dependent life cycle assessment (LCA) was performed using a single-stand perspective. Three forest stands located in different Swedish climate zones were studied in order to assess the global temperature change when using logging residues for producing district heating. These systems were compared with two fossil reference systems in which the logging residues were assumed to remain in the forest to decompose over time, while coal or natural gas was used for energy. The results showed that replacing coal with logging residues gave a direct climate benefit from a single-stand perspective, while replacing natural gas gave a delayed climate benefit of around 8-12 years depending on climate zone. A sensitivity analysis showed that the time was strongly dependent on the assumptions for extraction and combustion of natural gas. The LCA showed that from a single-stand perspective, harvesting logging residues for bioenergy in the south of Sweden would give the highest temperature change mitigation potential per energy unit. However, the differences between the three climate zones studied per energy unit were relatively small. On a hectare basis, the southern forest stand would generate more biomass compared to the central and northern locations, which thereby could replace more fossil fuel and give larger climate benefits.

Authors/Creators:Hammar, Torun and Ortiz, Carina and Stendahl, Johan and Ahlgren, Serina and Hansson, Per-Anders
Title:Time-dynamic effects on the global temperature when harvesting logging residues for bioenergy
Series/Journal:Bioenergy Research (1939-1234)
Year of publishing :2015
Depositing date:23 December 2015
Volume:8
Number:4
Page range:1912-1924
Number of Pages:13
Publisher:Springer
ISSN:1939-1234
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K50 Processing of forest products
P Natural resources > P40 Meteorology and climatology
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 207 Environmental Engineering > Energy Systems
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:life cycle analysis, logging wastes, climate change mitigation, global warming, boreal forests
Keywords:Life cycle assessment, Soil organic carbon, Global warming, Boreal forest, Biogenic carbon, Greenhouse gas emissions
URN:NBN:urn:nbn:se:slu:epsilon-e-3152
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3152
Additional ID:
Type of IDID
Web of Science (WoS)000365026600042
DOI10.1007/s12155-015-9649-3
ID Code:12926
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:23 Dec 2015 13:32
Metadata Last Modified:04 Jul 2016 23:15

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