Cloud plays a critically important role in the evolution of the changing climate, because of its effects on circulation, radiative balance, and hydrological- energy budgets on both regional and global scale. The cloud processes in global circulation and climate models has been primarily represented by cumulus parameterizations. The accuracy of such parameterizations needs to be evaluated. Direct observations of cloud processes are sparse, but detailed high-resolution numerical simulations of clouds have become more and more useful as computational performances have been greatly enhanced recently. Cloud-resolving models (CRM) have been recognized as a very useful tool to investigate the effects of radiative-convective equilibriums and the subgrid scale cloud parameterizations in climate models. They also have even been included in climate models as the super-parameterization of clouds, replacing the traditional cumulus parameterizations all together. The progress during the past decade should be reviewed, and new prospects should be discussed. This session is proposed to gather all active investigators in this area for such purposes.
All the following topics relating to the research of cloud-resolving models are encouraged to submit an abstract for the upcoming session in 2010 EGU.
* Quantitative precipitation estimate/forecast
* Diurnal evolution
* Water vapor, cloud, and precipitation budgets
* Impact on radiation
* Large-scale influences (e.g., SST, moisture, wind)
* Microphysical processes (including effects of aerosol)
Several keynote speakers will be invited to summarize past available scientific results.
Wei-Kuo Tao,Laboratory for Atmospheres,NASA GSFC(USA)