Kaya identity

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Kaya Identity: drivers of CO₂ emissions in the World. Percentage change in the four parameters of the Kaya Identity, which determine total CO₂ emissions.

The Kaya identity is a mathematical

carbon intensity (emissions per unit of energy consumed).[1][2] It is a concrete form of the more general I = PAT equation[3] relating factors that determine the level of human impact
on climate. Although the terms in the Kaya identity would in theory cancel out, it is useful in practice to calculate emissions in terms of more readily available data, namely population, GDP per capita, energy per unit GDP, and emissions per unit energy. It furthermore highlights the elements of the global economy on which one could act to reduce emissions, notably the energy intensity per unit GDP and the emissions per unit energy.

Overview

The Kaya identity was developed by Japanese energy economist Yoichi Kaya.

I=PAT
formula that describes the factors of environmental impact.

Kaya identity is expressed in the form:

Where:

And:

Use in IPCC reports

The Kaya identity plays a core role in the development of future emissions

global warming.[3]

Other uses

  • Joseph J. Romm disputed the validity of Gates' arguments, as well as clarifying the key idea behind the identity.[5]

See also

References

  1. ^
    ISBN 9280809113
    .
  2. doi:10.1016/0301-4215(93)90134-2
    .
  3. ^ a b Nakicenovic, Nebojsa; Swart, Rob, eds. (2000). "Chapter 3: Scenario Driving Forces, 3.1. Introduction". IPCC Special Report on Emissions Scenarios.
  4. ^ "The "Kaya Identity"". PennState Department of Meteorology. Meteo 469, From Meteorology to Mitigation: Understanding Global Warming. Retrieved 27 November 2015.
  5. ^ Why Bill Gates’ Math Error About Climate Change Matters ThinkProgress May 2, 2016.

External links

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