Table 8.7 GWP and GIP with and without inclusion of climate-carbon feedbacks cc
ID: 113840 • Letter: T
Question
Table 8.7 GWP and GIP with and without inclusion of climate-carbon feedbacks cc in response to emissions of te ndicated non-co, gases di ate-carbon feedbacks response to the reference gas CO, are always indluded). GWP20 GWP1 GTP GTP10 Lifetime (years) 12.4 No cc fb With cc f No cc fb With cc t No cc fo With cc ft No cc fb With cc fo 84 CH, 70 HFC-134a 13.4 3710 1300 3790 1550 3170 530 CFC-11 2340 21.0 264 277 234 297 CF 50,000.0 5270 With cc f Uncertainties related to the climate-carbon feedback are large, comparable in magnituade to the strength of the feedback for a single gas Perturbation ifetime is used in the calculation of metrics These values do not include CO, from methane oxidation. Values for fossil methane are higher by 1 and 2 for the 20 and 100 year metrics, respectively (lable &A.1;)Explanation / Answer
Calculation of percentage contribution of US Greenhouse Gas Emission in 2012
for GWP20 (without climate carbon feedback)
1. CH4 = 86 = 86/16114*100 = 0.53%
2. N2O = 268 = 268/16114*100 = 1.66%
3. HFC 134a = 3790/16114*100 = 23.52%
4. CFC 11 and CF4 = 7020+4950 = 11970/16114*100 = 74.29%
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