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Sökning: WFRF:(Tanaka Katsumasa)

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  • Tanaka, Katsumasa, et al. (författare)
  • Cost-effective implementation of the Paris Agreement using flexible greenhouse gas metrics
  • 2021
  • Ingår i: Science advances. - : American Association for the Advancement of Science (AAAS). - 2375-2548. ; 7:22
  • Tidskriftsartikel (refereegranskat)abstract
    • Greenhouse gas (GHG) metrics, that is, conversion factors to evaluate the emissions of non-CO 2 GHGs on a common scale with CO 2 , serve crucial functions in the implementation of the Paris Agreement. While different metrics have been proposed, their economic cost-effectiveness has not been investigated under a range of pathways, including those substantially overshooting the temperature targets. Here, we show that cost-effective metrics for methane that minimize the overall mitigation costs are time-dependent, primarily determined by the pathway, and strongly influenced by temperature overshoot. Parties to the Paris Agreement have already adopted the conventional GWP100 (100-year global warming potential), which is shown to be a good approximation of cost-effective metrics for the coming decades. In the longer term, however, we suggest that parties consider adapting the choice of common metrics to the future pathway as it unfolds, as part of the recurring global stocktake, if global cost-effectiveness is a key consideration.
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  • Tanaka, Katsumasa, et al. (författare)
  • Paris Agreement requires substantial, broad, and sustained policy efforts beyond COVID-19 public stimulus packages
  • 2022
  • Ingår i: Climatic Change. - : Springer Science and Business Media LLC. - 1573-1480 .- 0165-0009. ; 172:1-2
  • Tidskriftsartikel (refereegranskat)abstract
    • It has been claimed that COVID-19 public stimulus packages could be sufficient to meet the short-term energy investment needs to leverage a shift toward a pathway consistent with the 1.5 degrees C target of the Paris Agreement. Here, we provide complementary perspectives to reiterate that substantial, broad, and sustained policy efforts beyond stimulus packages will be needed for achieving the Paris Agreement long-term targets. Low-carbon investments will need to scale up and persist over the next several decades following short-term stimulus packages. The required total energy investments in the real world can be larger than the currently available estimates from integrated assessment models (IAMs). Existing databases from IAMs are not sufficient for analyzing the effect of public spending on emission reduction. To inform what role COVID-19 stimulus packages and public investments may play for reaching the Paris Agreement targets, explicit modelling of such policies is required.
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