Experimental measurements of collision‐induced absorption (CIA) cross sections for CO₂‐H₂ and CO₂‐CH₄ complexes were performed using Fourier transform spectroscopy over a spectral range of 150–475 cm⁻¹ and a temperature range of 200–300 K. These experimentally derived CIA cross sections agree with the spectral range of the calculation by Wordsworth et al. (2017) however, the amplitude is half of what was predicted. Furthermore, the CIA cross sections reported here agree with those measured by Turbet et al. (2019, 2019). Additionally, radiative transfer calculations of the early Mars atmosphere were performed, and showed that CO₂‐CH₄ CIA would require surface pressure greater than 3 bar for a 10% methane atmosphere to achieve 273 K at the surface. For CO₂‐H₂, liquid water is possible with 5% hydrogen and less than 2 bar of surface pressure.

中文翻译：

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碰撞诱导的CH4-CO2和H2-CO2络合物的吸收及其对古代火星大气的影响

使用傅立叶变换光谱在150-475 cm ^-1的光谱范围和200-300的温度范围内对CO ₂ -H ₂和CO ₂ -CH ₄配合物的碰撞诱导吸收（CIA）截面进行了实验测量这些实验得出的CIA横截面与Wordsworth等人的计算的光谱范围一致。（2017年），但幅度仅为预期的一半。此外，这里报道的CIA截面与Turbet等人测量的截面一致。（2019，2019）。此外，还进行了火星早期大气的辐射转移计算，结果表明CO ₂ -CH ₄对于10％的甲烷气氛，CIA要求表面压力大于3 bar，才能在表面达到273K。对于CO _2- H ₂，液态水可能含有5％的氢气和小于2 bar的表面压力。