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Factoring in the forgotten role of renewables in CO2 emission trends using decomposition analysis

Mohlin, Kristina; Camuzeaux, Jonathan R.; Müller, Adrian; Schneider, Marius and Wagner, Gernot (2018) Factoring in the forgotten role of renewables in CO2 emission trends using decomposition analysis. Energy Policy, 116, pp. 290-296.

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Online at: https://www.sciencedirect.com/science/article/pii/S0301421518300764

Summary

This paper introduces an approach for separately quantifying the contributions from renewables in decomposition analysis. So far, decomposition analyses of the drivers of national CO2 emissions have typically considered the combined energy mix as an explanatory factor without an explicit consideration or separation of renewables. As the cost of renewables continues to decrease, it becomes increasingly relevant to track their role in CO2 emission trends. Index decomposition analysis, in particular, provides a simple approach for doing so using publicly available data. We look to the U.S. as a case study, highlighting differences with the more detailed but also more complex structural decomposition analysis. Between 2007 and 2013, U.S. CO2 emissions decreased by around 10%—a decline not seen since the oil crisis of 1979. Prior analyses have identified the shale gas boom and the economic recession as the main explanatory factors. However, by decomposing the fuel mix effect, we conclude that renewables played an equally important role as natural gas in reducing CO2 emissions between 2007 and 2013: renewables decreased total emissions by 2.3–3.3%, roughly matching the 2.5–3.6% contribution from the shift to natural gas, compared with 0.6–1.5% for nuclear energy.


EPrint Type:Journal paper
Keywords:CO2 emissions, Renewable energy, Decomposition analysis
Subjects: Environmental aspects > Air and water emissions
Research affiliation: Switzerland > ETHZ - Agrarwissenschaften
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Socio-Economics > Agripolicy
USA
Switzerland > Other organizations
DOI:10.1016/j.enpol.2018.02.006
Deposited By: Muller, Adrian
ID Code:34753
Deposited On:28 Feb 2019 10:40
Last Modified:28 Feb 2019 10:40
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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