Certain gases are non-transparent in specific wavelength ranges
Evidence from multiple spectroscopic and atmospheric studies confirms that various gases selectively absorb radiation in specific wavelength ranges, rendering them non-transparent to those wavelengths.
The retrieved papers consistently support the claim that specific gases absorb radiation in distinct wavelength ranges (such as greenhouse gases absorbing in specific infrared bands and trace gases having defined absorption lines). Papers 1, 2, 4, and 11 explicitly document these absorption bands and wavelengths. No papers refute the claim.
S. Raghuraman, D. Paynter, V. Ramaswamy, R. Menzel, Xianglei Huang. Greenhouse Gas Forcing and Climate Feedback Signatures Identified in Hyperspectral Infrared Satellite Observations. 2023. https://doi.org/10.1029/2023GL103947
Paper 1 demonstrates decreases in outgoing longwave radiation in specific CO2, CH4, and N2O absorption bands, proving non-transparency in those wavelength ranges.
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I. Dunayevskiy, J. Kriesel, Andrea Biasioli, Y. Chien, D. Dunn-Rankin, L. Muzio, R. Himes. Dataset for SO2, SO3, H2SO4 and H2O infrared absorption spectra at 300° C and 350° C temperatures.. 2023. https://doi.org/10.1016/j.dib.2023.109066
Paper 2 provides library infrared absorption spectra for gases like SO2 and SO3 in distinct wavelength bands (7-8 um and 8-9 um), demonstrating selective transparency.
Jiaxin Wang, Minqiang Zhou, B. Langerock, Weidong Nan, Ting Wang, Pucai Wang. Optimizing the Atmospheric CO2 Retrieval Based on the NDACC-Type FTIR Mid-Infrared Spectra at Xianghe, China. 2024. https://doi.org/10.3390/rs16050900
Paper 4 analyzes CO2 absorption spectra and retrieval windows at specific wavenumbers (2600 and 4800 cm−1), confirming gas opacity at particular wavelengths.
Fan KC, Midkiff J, Hlaing M, Jain S, Chen RT. Slow-Light Mid-IR Silicon Photonic Chips for NO<sub>2</sub> and CH<sub>4</sub> Gas Detection.. 2026. https://doi.org/10.1021/acsomega.5c13205
Paper 11 demonstrates a mid-infrared gas sensor operating at specific fundamental absorption wavelengths (3.42 um for NO2 and 3.40 um for CH4) where these gases are non-transparent.
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