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An approach to include soil carbon changes in life cycle assessments

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An approach to include soil carbon changes in life cycle assessments. / Petersen, Bjorn Molt; Knudsen, Marie Trydeman; Hermansen, John Erik; Halberg, Niels.

I: Journal of Cleaner Production, Bind 52, 2013, s. 217-224.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Harvard

Petersen, BM, Knudsen, MT, Hermansen, JE & Halberg, N 2013, 'An approach to include soil carbon changes in life cycle assessments', Journal of Cleaner Production, bind 52, s. 217-224. https://doi.org/10.1016/j.jclepro.2013.03.007

APA

Petersen, B. M., Knudsen, M. T., Hermansen, J. E., & Halberg, N. (2013). An approach to include soil carbon changes in life cycle assessments. Journal of Cleaner Production, 52, 217-224. https://doi.org/10.1016/j.jclepro.2013.03.007

Vancouver

Petersen BM, Knudsen MT, Hermansen JE, Halberg N. An approach to include soil carbon changes in life cycle assessments. Journal of Cleaner Production. 2013;52:217-224. https://doi.org/10.1016/j.jclepro.2013.03.007

Author

Petersen, Bjorn Molt ; Knudsen, Marie Trydeman ; Hermansen, John Erik ; Halberg, Niels. / An approach to include soil carbon changes in life cycle assessments. I: Journal of Cleaner Production. 2013 ; Bind 52. s. 217-224.

Bibtex

@article{821e5c3fa7ca47bfb0ae3bc67e1cddff,
title = "An approach to include soil carbon changes in life cycle assessments",
abstract = "Globally, soil carbon sequestration is expected to hold a major potential to mitigate agricultural greenhouse gas emissions. However, the majority of life cycle assessments (LCA) of agricultural products have not included possible changes in soil carbon sequestration. In the present study, a method to estimate carbon sequestration to be included in LCA is suggested and applied to two examples where the inclusion of carbon sequestration is especially relevant: 1) Bioenergy: removal of straw from a Danish soil for energy purposes and 2) Organic versus conventional farming: comparative study of soybean production in China. The suggested approach considers the time of the soil CO2 emissions for the LCA by including the Bern Carbon Cycle Model. Time perspectives of 20,100 and 200 years are used and a soil depth of 0-100 cm is considered. The application of the suggested method showed that the results were comparable to the IPCC 2006 tier I approach in a time perspective of 20 year, where after the suggested methodology showed a continued soil carbon change toward a new steady state. The suggested method estimated a carbon sequestration for the first example when storing straw in the soil instead of using it for bioenergy of 54, 97 and 213 kg C t(-1) straw C in a 200, 100 and 20 years perspective, respectively. For the conversion from conventional to organic soybean production, a difference of 32, 60 or 143 kg soil C ha(-1) yr(-1) in a 200,100 or 20 years perspective, respectively was found. The study indicated that soil carbon changes included in an LCA can constitute a major contribution to the total greenhouse gas emissions per crop unit for plant products. The suggested approach takes into account the temporal aspects of soil carbon changes by combining the degradation and emissions of CO2 from the soil and the following decline in the atmosphere. Furthermore, the results from the present study highlights that the choice of the time perspective has a huge impact on the results used for the LCA. For comparability with the calculation of the global warming potential in LCA, it is suggested to use a time perspective of 100 years when using the suggested approach for soil carbon changes in LCA. (C) 2013 Elsevier Ltd. All rights reserved.",
keywords = "Carbon sequestration, Soil carbon, LCA, Straw, Bioenergy, Organic, Conventional, Soybean",
author = "Petersen, {Bjorn Molt} and Knudsen, {Marie Trydeman} and Hermansen, {John Erik} and Niels Halberg",
year = "2013",
doi = "10.1016/j.jclepro.2013.03.007",
language = "English",
volume = "52",
pages = "217--224",
journal = "Journal of Cleaner Production",
issn = "0959-6526",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - An approach to include soil carbon changes in life cycle assessments

AU - Petersen, Bjorn Molt

AU - Knudsen, Marie Trydeman

AU - Hermansen, John Erik

AU - Halberg, Niels

PY - 2013

Y1 - 2013

N2 - Globally, soil carbon sequestration is expected to hold a major potential to mitigate agricultural greenhouse gas emissions. However, the majority of life cycle assessments (LCA) of agricultural products have not included possible changes in soil carbon sequestration. In the present study, a method to estimate carbon sequestration to be included in LCA is suggested and applied to two examples where the inclusion of carbon sequestration is especially relevant: 1) Bioenergy: removal of straw from a Danish soil for energy purposes and 2) Organic versus conventional farming: comparative study of soybean production in China. The suggested approach considers the time of the soil CO2 emissions for the LCA by including the Bern Carbon Cycle Model. Time perspectives of 20,100 and 200 years are used and a soil depth of 0-100 cm is considered. The application of the suggested method showed that the results were comparable to the IPCC 2006 tier I approach in a time perspective of 20 year, where after the suggested methodology showed a continued soil carbon change toward a new steady state. The suggested method estimated a carbon sequestration for the first example when storing straw in the soil instead of using it for bioenergy of 54, 97 and 213 kg C t(-1) straw C in a 200, 100 and 20 years perspective, respectively. For the conversion from conventional to organic soybean production, a difference of 32, 60 or 143 kg soil C ha(-1) yr(-1) in a 200,100 or 20 years perspective, respectively was found. The study indicated that soil carbon changes included in an LCA can constitute a major contribution to the total greenhouse gas emissions per crop unit for plant products. The suggested approach takes into account the temporal aspects of soil carbon changes by combining the degradation and emissions of CO2 from the soil and the following decline in the atmosphere. Furthermore, the results from the present study highlights that the choice of the time perspective has a huge impact on the results used for the LCA. For comparability with the calculation of the global warming potential in LCA, it is suggested to use a time perspective of 100 years when using the suggested approach for soil carbon changes in LCA. (C) 2013 Elsevier Ltd. All rights reserved.

AB - Globally, soil carbon sequestration is expected to hold a major potential to mitigate agricultural greenhouse gas emissions. However, the majority of life cycle assessments (LCA) of agricultural products have not included possible changes in soil carbon sequestration. In the present study, a method to estimate carbon sequestration to be included in LCA is suggested and applied to two examples where the inclusion of carbon sequestration is especially relevant: 1) Bioenergy: removal of straw from a Danish soil for energy purposes and 2) Organic versus conventional farming: comparative study of soybean production in China. The suggested approach considers the time of the soil CO2 emissions for the LCA by including the Bern Carbon Cycle Model. Time perspectives of 20,100 and 200 years are used and a soil depth of 0-100 cm is considered. The application of the suggested method showed that the results were comparable to the IPCC 2006 tier I approach in a time perspective of 20 year, where after the suggested methodology showed a continued soil carbon change toward a new steady state. The suggested method estimated a carbon sequestration for the first example when storing straw in the soil instead of using it for bioenergy of 54, 97 and 213 kg C t(-1) straw C in a 200, 100 and 20 years perspective, respectively. For the conversion from conventional to organic soybean production, a difference of 32, 60 or 143 kg soil C ha(-1) yr(-1) in a 200,100 or 20 years perspective, respectively was found. The study indicated that soil carbon changes included in an LCA can constitute a major contribution to the total greenhouse gas emissions per crop unit for plant products. The suggested approach takes into account the temporal aspects of soil carbon changes by combining the degradation and emissions of CO2 from the soil and the following decline in the atmosphere. Furthermore, the results from the present study highlights that the choice of the time perspective has a huge impact on the results used for the LCA. For comparability with the calculation of the global warming potential in LCA, it is suggested to use a time perspective of 100 years when using the suggested approach for soil carbon changes in LCA. (C) 2013 Elsevier Ltd. All rights reserved.

KW - Carbon sequestration

KW - Soil carbon

KW - LCA

KW - Straw

KW - Bioenergy

KW - Organic

KW - Conventional

KW - Soybean

U2 - 10.1016/j.jclepro.2013.03.007

DO - 10.1016/j.jclepro.2013.03.007

M3 - Journal article

VL - 52

SP - 217

EP - 224

JO - Journal of Cleaner Production

JF - Journal of Cleaner Production

SN - 0959-6526

ER -

ID: 119763991