Systematic under- and overestimation of GHG reductions in renewable biomass systems |
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| Authors: | Thea L Whitman C Johannes Lehmann |
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| Institution: | (1) College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853, USA |
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| Abstract: | This paper identifies a critical systematic error in greenhouse gas accounting in renewable biomass systems. While CO2 emissions from renewable biomass energy systems are generally considered to have a net impact of 0, no similar adjustment
is made for carbon-based products of incomplete combustion, such as methane, in renewable systems. This results in an under-
or overestimation of the impact of CH4 by 12.3% and CO by ∼478% in renewable systems. This error is propagated both in scientific studies and in carbon accounting
policies. We advocate first for full-carbon accounting of biomass-derived emissions, but also provide adjusted global warming
impacts for emissions from proven renewable systems. |
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