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  • 21 Aug, 2019

  • By, Wikipedia

File:Longwave Absorption Coefficients Of H2O And CO2.svg
Note that, in the vicinity of its 15-micron absorption band, CO2 is a much stronger absorber than is water vapor. This is relevant to the greenhouse effect because Earth strongly emits thermal radiation in this range. Water vapor is a stronger absorber than CO2 for radiation with wavenumbers/frequencies at the left or right side of the plot.

Results are for sea-level atmospheric pressure, a water vapor concentration of 0.25%, and a CO2 concentration of 420 ppm.

The figure was generated using calculations done by the HAPI 1.2.2.0 software package available at http://hitran.org/hapi (Reference: R.V. Kochanov, I.E. Gordon, L.S. Rothman, P. Wcislo, C. Hill, J.S. Wilzewski, "HITRAN Application Programming Interface (HAPI): A comprehensive approach to working with spectroscopic data," J. Quant. Spectrosc. Radiat. Transfer 177, 15-30 (2016) DOI: 10.1016/j.jqsrt.2016.03.005), using spectroscopic data from the HITRAN database.
Date Source Own work Author Rhwentworth

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Captions

Plot of the longwave-infrared absorption coefficients of water vapor and carbon dioxide

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greenhouse gas

inception

26 May 2023

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Date/TimeThumbnailDimensionsUserComment
current22:42, 2 June 2023Thumbnail for version as of 22:42, 2 June 2023576 × 432 (262 KB)RhwentworthTechnical update
08:00, 27 May 2023Thumbnail for version as of 08:00, 27 May 2023576 × 432 (264 KB)RhwentworthImproved spacing in legend
06:34, 27 May 2023Thumbnail for version as of 06:34, 27 May 2023576 × 432 (264 KB)RhwentworthFixed scale error and made other minor adjustments
21:55, 26 May 2023Thumbnail for version as of 21:55, 26 May 2023576 × 432 (333 KB)RhwentworthUploaded own work with UploadWizard

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