Interpreting shortwave albedo‐transmittance plots: True or apparent anomalous absorption?

The coefficients of linear regression lines fit to hourly observations of atmospheric transmittance and TOA albedo have been used previously to address the problem of anomalous cloud absorption (ACA). While these coefficients indicate, reasonably well, the impact of clouds on atmospheric absorptance for 1D model data, this is not necessarily the case for hourly data. This is because for nonuniform clouds, regression coefficients are reduced …