报告内容摘要：

In this talk Dr Liu will introduce an aerosol module and aerosol-cloud interaction parameterizations in NCAR Community Atmospheric Model version 5 (CAM5). The modal aerosol module (MAM) predicts both aerosol mass and number, and internal/external mixing between aerosol components. The aerosol interface with a two-moment stratiform cloud microphysics considers cloud droplet activation and ice nucleation in mixed-phase and cold ice clouds, and ice supersaturation in cold ice clouds is also allowed.

Dr Liu will present an evaluation of aerosol and cloud microphysics predictions from CAM5 with observations. They find that a simplified MAM treatment (3-mode version) which is designed for high-resolution global simulations captures the essence of aerosol direct and indirect effects when compared with the benchmark 7-mode treatment. Cloud microphysics in CAM5 captures the cloud structure and liquid/ice partitioning in mixed-phase clouds evaluated with the DOE ARM Mixed-Phase Arctic Cloud Experiment (M-PACE) observations. At the end, aerosol-cloud-precipitation interactions are investigated using CAM5 with a focus on East Asia monsoon.