Zhien Wang — University of Colorado
Min Deng — University of Colorado, Boulder
Damao Zhang — Pacific Northwest National Laboratory
Tao Luo — University of Wyoming
Jing Yang — University of Wyoming
Category
Ice Nucleation and Cloud Phase
Description
Comparison of temperature dependent LWC fraction among the three convective cloud life stages and two parameterizations developed by Smith 1990 and Bower et al. 1996.
The liquid-ice mass partitions in stratiform and convective mixed-phase clouds are important in regulating cloud radiative properties, precipitation generation and their lifecycles, but it is still challenging to reliably simulate them. Remote sensing and in situ measurements are used to characterize the liquid-ice mass partitions in arctic stratiform mixed-phase clouds and tropical isolated convective clouds. These observation results provide important constraints for model simulations as well as for related process studies. This poster summarizes our recent activities and progresses. 1) An improved multi-year data set of arctic stratiform mixed-phase cloud properties including ice number concentrations is developed with multi-sensor observations at the ACRF Barrow site. The data set will be released as a PI product. 2) The dependence of liquid-ice mass partition on ice concentration and aerosol properties is explored with the multi-year data set at the Barrow site. 3) A new approach is developed to separate liquid and ice particles based on in situ 2D probe measurements, which allow us to quantify liquid-ice mass partition in tropical isolated convective clouds. 4) The systemic differences in the temperature dependence of liquid-ice mass partition between stratiform and convective clouds highlight the importance to understand ice generation differences between them. 5) With these observational results, the CAM5 and the WRF with bin microphysics are used to test new ice concentration parameterizations in order to simulate observed liquid-ice mass partition.
