Global Warming Potentials (IPCC Second Assessment Report)
Species. Chemical formula. Lifetime (years) Global Warming Potential (Time Horizon) 20 years. 100 years. 500 years. Carbon dioxide. CO 2. variable § 1. 1. 1. Methane *
Annex 1 provides GWP values for additional GHGs and substances. The Methane - fossil GWP value should be used for methane emissions from fossil fuel fugitive emission sources (e.g., oil & gas systems, coal mining) and industrial processes where carbon in methane is of fossil origin (e.g., carbide production, ethylene production).
The following table includes the 100-year time horizon global warming potentials (GWP) relative to CO2. This table is adapted from the IPCC Fifth Assessment Report, 2014 (AR5)i.
Understanding Global Warming Potentials | US EPA
2024年8月8日 · Methane (CH 4) is estimated to have a GWP of 27-30 over 100 years. CH 4 emitted today lasts about a decade on average, which is much less time than CO 2. But CH 4 also absorbs much more energy than CO 2. The net effect of the shorter lifetime and higher energy absorption is reflected in the GWP.
GHG Global Warming Potentials - California Air Resources Board
GWPs are used to convert GHG emission values to "carbon dioxide equivalent" (CO 2 e) units. The percent change in GWP (above) will be mirrored in all CO 2 e emissions. Each greenhouse gas (GHG) has a global warming potential value, which reflects the climate forcing of a kilogram of emissions relative to the same mass of carbon dioxide (CO2).
Global Warming Potential - Стэнфордский университет
Typical values after including climate-carbon feedback are: For CH 4 -GWP20 = 86 and GWP 100 = 34 and For N 2 O- GWP20 = 268 and GWP 100 = 298. The uncertainty ranges in AGWP for CO 2 were estimated to be (+or-)18% and (+or-)26% for 20 and 100 years. Reisinger et al. estimated the uncertainty in the GWP100 for CH 4 to be around -30 to +40%. [3] .
High-GWP Refrigerants - California Air Resources Board
High-global warming potential (high-GWP) refrigerants include all ozone-depleting substances and any refrigerant with a GWP of 150 or higher. What is Global Warming Potential? Global Warming Potential, or GWP, is a measure of how destructive a climate pollutant is.
Dichlorodifluoromethane | CCl2F2 | CID 6391 - PubChem
Dichlorodifluoromethane | CCl2F2 | CID 6391 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
Dichlorodifluoromethane - Wikipedia
Dichlorodifluoromethane (R-12) is a colorless gas popularly known by the genericized brand name Freon (as Freon-12). It is a chlorofluorocarbon halomethane (CFC) used as a refrigerant and aerosol spray propellant .
Here we report CO2e using BOTH 20 and 100 year time horizons, because this conveys climate impacts of emissions over all timescales (Ocko et al. 2017). We also show the full time series of CO2e (year 1-100) based on the most recent IPCC sixth assessment report (2021).