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Assessing the CAM5 Physics Suite in the WRF-Chem Model : Implementation, Evaluation, and Resolution Sensitivity
Contributor:Ma, P.-L.; Rasch, P. J.; Fast, J. D.; Easter, R. C.; Gustafson, W. I., Jr.; Liu, Xiaohong; Ghan, S. J.; Singh, B.
A suite of physical parameterizations (deep and shallow convection, turbulent boundary layer, aerosols, cloud microphysics, and cloud fraction) from the global climate model Community Atmosphere Model version 5.1 (CAM5) ...
Importance of Including Ammonium Sulfate ((NH4)2SO4) Aerosols for Ice Cloud Parameterization in GCMs
Contributor:Bhattacharjee, P. S.; Sud, Y. C.; Liu, Xiaohong; Walker, G. K.; Yang, R.; Wang, J.
A common deficiency of many cloud-physics parameterizations including the NASA's microphysics of clouds with aerosol-cloud interactions (hereafter called McRAS-AC) is that they simulate lesser (larger) than the observed ...
Emission Controls Versus Meteorological Conditions in Determining Aerosol Concentrations in Beijing during the 2008 Olympic Games
Contributor:Gao, Y.; Liu, Xiaohong; Zhao, C.; Zhang, M.
A series of emission control measures were undertaken in Beijing and the adjacent provinces in China during the 2008 Beijing Olympic Games on 8-24 August 2008. This provides a unique opportunity for investigating the ...
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 ...
Novel Approach for Determining Source-Receptor Relationships in Model Simulations : A Case Study of Black Carbon Transport in Northern Hemisphere Winter, A
Contributor:Ma, P.-L.; Gattiker, J. R.; Liu, Xiaohong; Rasch, P. J.
A Gaussian process emulator is applied to quantify the contributions of local and remote emissions of black carbon to its concentrations in different regions using a Latin hypercube sampling strategy for emission perturbations ...
Single-Column Model Ensemble Approach Applied to the TWP-ICE Experiment, A
Contributor:Davies, L.; Jakob, C.; Cheung, K.; Del Genio, A.; Hill, A.; Hume, T.; Keane, R. J.; Komori, T.; Larson, V. E.; Lin, Y.; Liu, Xiaohong; Nielsen, B. J.; Petch, J.; Plant, R. S.; Singh, M. S.; Shi, X.; Song, X.; Wang, W.; Whitall, M. A.; Wolf, A.; Xie, S.; Zhang, G.
Single-column models (SCM) are useful test beds for investigating the parameterization schemes of numerical weather prediction and climate models. The usefulness of SCM simulations are limited, however, by the accuracy of ...
Climate Impacts of Ice Nucleation
Contributor:Gettelman, A.; Liu, Xiaohong; Barahona, D.; Lohmann, U.; Chen, C.
Several different ice nucleation parameterizations in two different General Circulation Models (GCMs) are used to understand the effects of ice nucleation on the mean climate state, and the Aerosol Indirect Effects (AIE) ...
Toward a Minimal Representation of Aerosols in Climate Models : Description and Evaluation in the Community Atmosphere Model CAM5
Contributor:Liu, Xiaohong; Easter, R. C.; Ghan, S. J.; Zaveri, R.; Rasch, P.; Shi, X.; Lamarque, J.-F.; Gettelman, A.; Morrison, H.; Vitt, F.; Conley, A.; Park, S.; Neale, R.; Hannay, C.; Ekman, A. M. L.; Hess, P.; Mahowald, N.; Collins, W.; Iacono, M. J.; Bretherton, C. S.; Flanner, M. G.; Mitchell, D.
A modal aerosol module (MAM) has been developed for the Community Atmosphere Model version 5 (CAM5), the atmospheric component of the Community Earth System Model version 1 (CESM1). MAM is capable of simulating the aerosol ...
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 ...
Constraining Cloud Lifetime Effects of Aerosols using A-Train Satellite Observations
Contributor:Wang, M.; Ghan, S.; Liu, Xiaohong; L'Ecuyer, T. S.; Zhang, K.; Morrison, H.; Ovchinnikov, M.; Easter, R.; Marchand, R.; Chand, D.; Qian, Y.; Penner, J. E.
Aerosol indirect effects have remained the largest uncertainty in estimates of the radiative forcing of past and future climate change. Observational constraints on cloud lifetime effects are particularly challenging since ...