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The longwave gas optics scheme uses a total of 140 g-points (k terms) in 16 bands. The evaluation has been performed using radiative transfer with four zenith angles in each hemisphere (8 streams). The following plots evaluate fluxes and heating rates for the four CKDMIP greenhouse-gas scenarios "Present", "Preindustrial", "Glacial Maximum" and "Future" (click on individual plots to expand). The shaded regions in the central three panels of each plot encompass 95% of the data. Generally the downwelling fluxes are unbiased, the upwelling TOA fluxes are underestimated by around 0.4 W m-2, and there are some "wiggles" in the heating rate profile errors.
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