Theoretical Absorption Cross Sections for the indicated gases, averaged to 1 cm-1 resolution for clarity. (from HITRAN-PC).
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Figure 1. Theoretical IR cross sections for absorption in the wavenumber range most relevant to longwave (terrestrial) radiation.

Figure 2. Theoretical IR cross sections for absorption in the wavenumber range at higher wavenumbers. Note the bands you might use for remote sensing of clouds, or to use for absorption measurements for specific gases.