Using satellite observations to evaluate model representation of Arctic
mixed-phase clouds
Abstract
Clouds play an important role in determining Arctic warming, but remain
difficult to constrain with available observations. We use two
satellite-derived cloud phase metrics to investigate the vertical
structure of Arctic clouds in global climate models that use the
Community Atmosphere Model version 6 (CAM6) atmospheric component. We
produce a set of constrained model runs by adjusting model microphysical
variables to match the cloud phase metrics. Models in this small
ensemble have variable representation of cloud amount and phase in the
winter, while uniformly underestimating total cloud cover in the spring
and overestimating it in the summer. We find a consistent correlation
between winter and spring cloud cover simulated for the present-day and
the longwave cloud feedback parameter.