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Representation of Arctic Mixed-Phase Clouds and the Wegener-Bergeron- Findeisen Process in Climate Models : Perspectives from a Cloud-Resolving Study
Contributor:Fan, J.; Ghan, S.; Ovchinnikov, M.; Liu, Xiaohong; Rasch, P. J.; Korolev, A.
Two types of Arctic mixed-phase clouds observed during the ISDAC and M-PACE field campaigns are simulated using a 3-dimensional cloud-resolving model (CRM) with size-resolved cloud microphysics. The modeled cloud properties ...
Aerosol Effects on Cirrus Through Ice Nucleation in the Community Atmosphere Model CAM5 with a Statistical Cirrus Scheme
Contributor:Wang, Minghuai; Liu, Xiaohong; Zhang, Kai; Comstock, Jennifer M.
A statistical cirrus scheme that tracks ice saturation ratio in the clear-sky and cloudy portion of a grid box separately has been implemented into the Community Atmosphere Model CAM5 to provide a consistent treatment of ...
Intercomparison of the Cloud Water Phase Among Global Climate Models
Contributor:Komurcu, M.; Storelvmo, T.; Tan, I.; Lohmann, U.; Yun, Y.; Penner, J. E.; Wang, Y.; Liu, Xiaohong; Takemura, T.
Mixed-phase clouds (clouds that consist of both cloud droplets and ice crystals) are frequently present in the Earth's atmosphere and influence the Earth's energy budget through their radiative properties, which are highly ...
Testing Cloud Microphysics Parameterizations in NCAR CAM5 with ISDAC and M-PACE Observations
Contributor:Liu, Xiaohong; Xie, Shaocheng; Boyle, James; Klein, Stephen A.; Shi, Xiangjun; Wang, Zhien; Lin, Wuyin; Ghan, Steven J.; Earle, Michael; Liu, Peter S. K.; Zelenyuk, Alla
Arctic clouds simulated by the National Center for Atmospheric Research (NCAR) Community Atmospheric Model version 5 (CAM5) are evaluated with observations from the U.S. Department of Energy (DOE) Atmospheric Radiation ...
Contributions of Clouds, Surface Albedos, and Mixed-Phase Ice Nucleation Schemes to Arctic Radiation Biases in CAM5
Contributor:English, Jason M.; Kay, Jennifer E.; Gettelman, Andrew; Liu, Xiaohong; Wang, Yong; Zhang, Yuying; Chepfer, Helene
The 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 ...
Droplet Nucleation : Physically-Based Parameterization and Validation
Contributor:Ghan, Steven J.; Abdul-Razzak, Hayder; Nenes, Athanasios; Ming, Yi; Liu, Xiaohong; Ovchinnikov, Mikhail; Shipway, Ben; Meskhidze, Nicholas; Xu, Jun; Shi, Xiangjun
One of the greatest sources of uncertainty in simulations of climate and climate change is the influence of aerosols on the optical properties of clouds. The root of this influence is the droplet nucleation process, which ...
Radiative Impact of Mineral Dust on Monsoon Precipitation Variability Over West Africa
Contributor:Zhao, C.; Liu, Xiaohong; Leung, L. R.; Hagos, S.
The radiative forcing of dust and its impact on precipitation over the West Africa monsoon (WAM) region is simulated using a coupled meteorology and aerosol/chemistry model (WRF-Chem). During the monsoon season, dust is a ...
Toward a Minimal Representation of Aerosols in Climate Models : Comparative Decomposition of Aerosol Direct, Semidirect, and Indirect Radiative Forcing
Contributor:Ghan, S. J.; Liu, Xiaohong; Easter, R. C.; Zaveri, R.; Rasch, P. J.; Yoon, J.-H.; Eaton, B.
The authors have decomposed the anthropogenic aerosol radiative forcing into direct contributions from each aerosol species to the planetary energy balance through absorption and scattering of solar radiation, indirect ...
Global Distribution and Climate Forcing of Marine Organic Aerosol : 1. Model Improvements and Evaluation
Contributor:Meskhidze, N.; Xu, J.; Gantt, B.; Zhang, Y.; Nenes, A.; Ghan, S. J.; Liu, Xiaohong; Easter, R.; Zaveri, R.
Marine organic aerosol emissions have been implemented and evaluated within the National Center of Atmospheric Research (NCAR)'s Community Atmosphere Model (CAM5) with the Pacific Northwest National Laboratory's 7-mode ...
Sensitivity Studies of Dust Ice Nuclei Effect on Cirrus Clouds with the Community Atmosphere Model CAM5
Contributor:Liu, Xiaohong; Shi, X.; Zhang, K.; Jensen, E. J.; Gettelman, A.; Barahona, D.; Nenes, A.; Lawson, P.