Perfluoroalkanes are fully fluorinated greenhouse gases. These compounds are chemically inert due to their C–F bonds and therefore have atmospheric lifetimes of thousands of years. Although regulated under the Kyoto Protocol, atmospheric concentrations of perfluoroalkanes have continued to increase since 1997. To quantify the climate impact of perfluoro-n-heptane and perfluoro-n-octane, spectral data are required to calculate climate metrics such as the radiative efficiency and global warming potential. Experimental measurements are scarce for these compounds and are only available at 296 and 297 K. In this work, a set of absorption cross-sections is provided in the range 515–1500 cm⁻¹ at 0.1 cm⁻¹ resolution for nine temperatures between 300 and 350 K. There is general agreement between literature values and the absorption cross-sections and climate metrics measured in this work. These quantities do not show significant temperature dependence. The temperature averaged radiative efficiency is 0.50 ± 0.06 and 0.54 ± 0.07 Wm⁻²ppbv⁻¹ for n–C₇F₁₆ and n–C₈F₁₈, respectively. The temperature averaged 100-year global warming potential is 8738 ± 1149 for n–C₇F₁₆ and 8392 ± 1103 for n–C₈F₁₈.

全氟烷烃是完全氟化的温室气体。这些化合物由于其 C-F 键而具有化学惰性，因此在大气中的寿命可达数千年。尽管受到京都议定书的监管，大气中全氟烷烃的浓度自 1997 年以来一直在持续增加。为了量化全氟正庚烷和全氟正辛烷对气候的影响，需要光谱数据来计算气候指标，例如辐射效率和全球变暖潜势。^{这些化合物的实验测量很少，只能在 296 和 297 K 下进行。在这项工作中，在 515–1500 cm -1}范围内提供了一组吸收截面，0.1 cm ^-1分辨率为 300 到 350 K 之间的九个温度。文献值与本工作中测量的吸收截面和气候指标之间存在普遍一致。这些数量没有表现出明显的温度依赖性。n–C ₇ F ₁₆和n–C ₈ F ₁₈的温度平均辐射效率分别为0.50 ± 0.06 和0.54 ± 0.07 Wm ^-2 ppbv ^-1。_{n–C 7} F ₁₆的平均温度 100 年全球变暖潜能值为 8738 ± 1149，n –C ₈ F ₁₈的温度平均为8392 ± 1103 。