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Evaluating the Mutual Relationship between IPAT/Kaya Identity Index and ODIAC-Based GOSAT Fossil-Fuel CO 2 Flux: Potential and Constraints in Utilizing Decomposed Variables

Author

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  • YoungSeok Hwang

    (Department of Climate Change, Kyungpook National University, Daegu 41566, Korea)

  • Jung-Sup Um

    (Department of Geography, Kyungpook National University, Daegu 41566, Korea)

  • Stephan Schlüter

    (Department of Mathematics, Natural and Economic Sciences, Ulm University of Applied Sciences, 89075 Ulm, Germany)

Abstract

The IPAT/Kaya identity is the most popular index used to analyze the driving forces of individual factors on CO 2 emissions. It represents the CO 2 emissions as a product of factors, such as the population, gross domestic product (GDP) per capita, energy intensity of the GDP, and carbon footprint of energy. In this study, we evaluated the mutual relationship of the factors of the IPAT/Kaya identity and their decomposed variables with the fossil-fuel CO 2 flux, as measured by the Greenhouse Gases Observing Satellite (GOSAT). We built two regression models to explain this flux; one using the IPAT/Kaya identity factors as the explanatory variables and the other one using their decomposed factors. The factors of the IPAT/Kaya identity have less explanatory power than their decomposed variables and comparably low correlation with the fossil-fuel CO 2 flux. However, the model using the decomposed variables shows significant multicollinearity. We performed a multivariate cluster analysis for further investigating the benefits of using the decomposed variables instead of the original factors. The results of the cluster analysis showed that except for the M factor, the IPAT/Kaya identity factors are inadequate for explaining the variations in the fossil-fuel CO 2 flux, whereas the decomposed variables produce reasonable clusters that can help identify the relevant drivers of this flux.

Suggested Citation

  • YoungSeok Hwang & Jung-Sup Um & Stephan Schlüter, 2020. "Evaluating the Mutual Relationship between IPAT/Kaya Identity Index and ODIAC-Based GOSAT Fossil-Fuel CO 2 Flux: Potential and Constraints in Utilizing Decomposed Variables," IJERPH, MDPI, vol. 17(16), pages 1-18, August.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:16:p:5976-:d:400201
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    References listed on IDEAS

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