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The radiative efficiency of HCF2OCF2OCF2CF2OCF2H (H-Galden 1040x) revisited |
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| Authors: | T.J. Wallington M.D. Hurley O.J. Nielsen |
| Affiliation: | 1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan |
| Abstract: | The infrared spectrum of HCF2OCF2OCF2CF2OCF2H (CAS# 188690-77-9) has been re-measured. The integrated absorption intensity over the range 1000–1500 cm?1 measured in the present work is (6.65 ± 0.33) × 10?17 cm2 molecule?1 cm?1 in 700 Torr of air at 296 K. The radiative efficiency of HCF2OCF2OCF2CF2OCF2H is calculated to be 1.02 W m?2 ppb?1. The value reported in the 2007 Intergovernmental Panel on Climate Change (IPCC) report is approximately 35% larger reflecting what we believe to be an erroneously high value for the absorption strength of HCF2OCF2OCF2CF2OCF2H adopted by the IPCC. |
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