Study of longwave radiative transfer in stratocumulus clouds by using bin optical properties and bin microphysics scheme

Compared with the observations the bulk radiation schemes failed to simulate the cloud base warming, while the bin radiation scheme reproduced well the observed cloud base warming. Considering the cloud top cooling the bin scheme overestimated the observed values, but agreed well with the results of other detailed radiation models. This difference might be explained by uncertainties about the vertical extent of the layer where divergence of the net radiation profile was large.