Global Simulations of ice Nucleation and Ice Supersaturation with an Improved Cloud Scheme in the Community Atmosphere Model
A process-based treatment of ice supersaturation and ice nucleation is implemented in the National Center for Atmospheric Research Community Atmosphere Model (CAM). The new scheme is designed to allow (1) supersaturation with respect to ice, (2) ice nucleation by aerosol particles, and (3) ice cloud cover consistent with ice microphysics. The scheme is implemented with a two-moment microphysics code and is used to evaluate ice cloud nucleation mechanisms and supersaturation in CAM. The new model is able to reproduce field observations of ice mass and mixed phase cloud occurrence better than ...
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Gettelman, A.; Liu, Xiaohong; Ghan, S. J.; Morrison, H.; Park, S.; Conley, A. J.; Klein, S. A.; Boyle, J.; Mitchell, D. L.; Li, J.-L.F.
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Contributions of Clouds, Surface Albedos, and Mixed-Phase Ice Nucleation Schemes to Arctic Radiation Biases in CAM5 Author(s):English, Jason M.; Kay, Jennifer E.; Gettelman, Andrew; Liu, Xiaohong; Wang, Yong; Zhang, Yuying; Chepfer, Helene
Date:2014-07-01The Arctic radiation balance is strongly affected by clouds and surface albedo. Prior work has identified Arctic cloud liquid water path (LWP) and surface radiative flux biases in the Community Atmosphere Model, version 5 ...
Author(s):Xie, S.; Liu, Xiaohong; Zhao, C.; Zhang, Y.
Date:2013-08-15Sensitivity of Arctic clouds and radiation in the Community Atmospheric Model, version 5, to the ice nucleation process is examined by testing a new physically based ice nucleation scheme that links the variation of ice ...
Examination of the potential impacts of dust and pollution aerosol acting as cloud nucleating aerosol on water resources in the Colorado River Basin Author(s):Jha, Vandana
Date Submitted:2016In this study we examine the cumulative effect of dust acting as cloud nucleating aerosol (cloud condensation nuclei (CCN), giant cloud condensation nuclei (GCCN), and ice nuclei (IN)) along with anthropogenic aerosol ...