File:Longwave Absorption Coefficients of H2O and CO2.svg
Size of this PNG preview of this SVG file: 576 × 432 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,280 × 960 pixels | 2,560 × 1,920 pixels.
Original file (SVG file, nominally 576 × 432 pixels, file size: 262 KB)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: This chart plots the absorption coefficient of water vapor and carbon dioxide, for electromagnetic radiation with wavenumber values (i.e., frequency divided by the speed of light) in the range 200-1600 cm-1 (wavelengths in the range 6.25-50 microns).
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 |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:42, 2 June 2023 | | 576 × 432 (262 KB) | Rhwentworth | Technical update |
| 08:00, 27 May 2023 |  | 576 × 432 (264 KB) | Rhwentworth | Improved spacing in legend | |
| 06:34, 27 May 2023 |  | 576 × 432 (264 KB) | Rhwentworth | Fixed scale error and made other minor adjustments | |
| 21:55, 26 May 2023 |  | 576 × 432 (333 KB) | Rhwentworth | Uploaded own work with UploadWizard |
File usage
The following 4 pages use this file:
Global file usage
The following other wikis use this file:
- Usage on zh.wikipedia.org
