2.4.1 Global warming potentials for non-CO2 greenhouse gases

Course subject(s) 2. Accounting energy use and GHG emissions

Having so far looked into the emissions and associated climate impact of CO2, we will now look at the relative impact that other greenhouse gases have on the climate.

Key takeaways:

  • Global warming potential (GWP) gives an indication of the impact a gas has on global temperature, relative to CO2
  • GWP allows us to compare the impact of different greenhouse gases
  • The main strategies to mitigate non-CO2 greenhouse gases are to: avoid emitting activities, avoid the formation of these gases, capture and destroy the gases

Summary of some important data and equations:

Overview of Global Warming Potential (GWP) values
Substance Formula GWP100
Carbon dioxide CO2 1
Methane (biogenic) CH4 27
Methane (fossil) CH4 29.8
Nitrous oxide N2O 273
HFC-134a CH2FCF3 1526
Carbon tetrafluoride CF4 7380
Hexafluoroethane C2F6 12400
Sulphur hexafluoride SF6 25200
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