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Yangang Liu

LiuYAdjunct Professor

Ph. D, 1998, Atmospheric Sciences, Desert Research Institute, University of Nevada-Reno

E-mail: lyg@bnl.gov

Physical, optical and chemical properties of atmospheric particles, including aerosols, clouds and precipitation

 


 

 

Research Interests

Scientific interests have centered on physical, optical and chemical properties of atmospheric particles, including aerosols, clouds and precipitation.  Research activities include theoretical studies, mathematical modeling, data analysis, and field investigations.  Current research is focusing on interactions among these particle systems, their effects on climate  and how to represent them in climate models. See also http://www.ecd.bnl.gov/researchint.html and http://www.bnl.gov/esm/.

 


Publications

Liu, Y, 2010: Comment on “Seasonal Variation of the Physical Properties of Marine Boundary Layer Clouds off the California Coast” by Lin et al. J. Climate, 23, 3416-3420.

Wu, W. and Liu, Y. 2010: Radiation entropy flux and entropy production of the Earth system. Rev. Geophys,  48, RG2003, doi:10.1029/2008RG000275.

Wu, W. and Liu, Y. 2010: A new radiative equilibrium model for investigating atmospheric radiation entropy flux. Phil. Trans. Roy. Soc. B365, 1367-1376, doi:10.1098/rstb.2009.0301.

Niu, S., X. Jia, J. Sang, X. Liu, C. Lu, and Y. Liu, 2010: Distributions of raindrop sizes and fall velocities in a semi-arid plateau climate: convective vs. stratiform rains. J. applied Met and Climatology, 49, 632-645.

Huang, D., Liu, Y., and Wiscombe, W., 2010:  Replacing pixel representations by point-function schemes for reducing discretization error in ill-posed remote sensing problems, with examples from cloud tomography. Remote Sensing Letters, 1, 95-102.

Huang, D., Johnson, K., Liu, Y., and Wiscombe, W., 2009:Retrieval of cloud liquid water vertical distributions using collocated Ka-band and W-band cloud radars. Geophys. Res. Lett, 36, L24807, doi:10.1029/2009GL041364

Guo, H, Y. Liu, P. H. Daum, X. Zeng, X.Li, and W. Tao, 2009:  Effects of model resolutions on entrainment (inversion heights), cloud-radiation interactions, and cloud radiative forcing. Atmos. Chem. Phys (revised).

Wang, J., P. H. Daum, S. Yum, Y. Liu, G. Senum, M. Lu, J. Seinfeld, and H. Jonsson, 2009: Observations of marine stratocumulus microphysics and implications for processes controlling droplet spectra: results from the Marine Stratus/Stratocumulus Experiment (MASE). J. Geophys. Res., 114, D18210, doi:10.1029/2008JD011035

Rotstayn, L. D., and Y. Liu, 2009: Cloud Droplet Spectral Dispersion and the Indirect Aerosol Effect: Comparison of Two Treatments in a GCM. Geophys. Res. Lett, 36, L10801, doi:10.1029/2009GL038216

Liu. Y., P. H. Daum, H.Guo, and Y. Peng, 2008: Dispersion Bias, Dispersion Effect, and Aerosol-Cloud Conundrum. Environ. Res. Lett., 3, 045021, doi:10.1088/1748-9326/3/4/045021 (invited)

Guo, H, Y. Liu, P. H. Daum and W. Tao, 2008:  Characteristics of vertical velocity in marine stratocumulus: Comparison of LES simulations with observations, Environ. Res. Lett., 3, 045020, doi:10.1088/1748-9326/3/4/045020.

Huang, D., Liu, Y., and Wiscombe, W., 2008:  Cloud tomography: Role of constraints and a new algorithm. J. Geophys. Res., 113, D23203, doi:10.1029/2008JD009952.

Liu, Y. and Daum, P. H., 2008: Relationship of refractive index to mass density and mixing rules for multicompoent mixtures like ambient aerosols. J. Aerosol Sci. 39, 974-986.

Huang, D., Y. Liu, and W. Wiscombe, 2008, Determination of 3D cloud liquid water content with tomography. J. Geophys. Res. 113, D13201, doi:10.1029/2007JD009133.

Liu, Y., B. Geert, M. Miller, P. H. Daum, and M. McGraw, 2008: Threshold radar reflectivity for drizzling clouds. Geophys. Res. Lett, 35, L03807, doi:10.1029/2007GL031201.

Liu, Y., P. H. Daum, and S. Yum, 2008: Ship tracks revisited: New understanding and cloud parameterization. Asia-pacific J. Atmos. Sci., 44, 1-9 (invited)

Liu, Y., P. H. Daum, R. McGraw, M. Miller, and S. Niu, 2008: Correction to “Theoretical expression for the autoconversion rate of droplet concentration”. Geophys. Res. Lett, 34, L04806, doi:10.1029/2008GL033290

Guo, H, Y. Liu and J. Penner, 2008: Does threshold representation associated with the autoconversion process matter? Atmos. Chem. Phys., 8, 1225-1230.

Kim, B., M. A., Miller, S. E. Schwartz, Y. Liu, and Q. Min, 2008: Importance of adiabaticity in evaluating aerosol indirect effect derived from ground-based remote sensing. J. Geophys. Res., 113, D05210, doi:10.1029/2007JD008961.

Liu, Y., P. H. Daum, R. McGraw, M. Miller, and S. Niu, 2007: Theoretical expression for the autoconversion rate of droplet concentration. Geophys. Res. Lett, 34, L16821, doi:10.1029/2007GL030389.

Liu, Y., P. H. Daum, R. McGraw, and M. Miller, 2006: Generalized threshold function accounting for effect of relative dispersion on threshold behavior of autoconversion process. Geophys. Res. Lett, 33. L11804, doi:10.1029/2005GL0255000.

Liu, Y., Daum, P.H., and Yum, S.S. 2006:  Analytical expression for the relative dispersion of the cloud droplet size distribution, Geophys. Res. Lett., 33, L02810, doi:10.1029/2005GL024052

McGraw, R. and Y. Liu, 2006: Brownian drift-diffusion model for evolution of droplet
size distributions in turbulent clouds. Geophys. Res. Lett., 33, L03802, doi:10.1029/2005GL023545.

Liu, Y., P. H. Daum, R. McGraw, and R. Wood, 2006: Parameterization of the autoconversion process. Part II: Generalization of Sundqvist-type parameterizations. J. Atmos. Sci .63, 1103-1109.

Liu, Y. and Daum, P. H., 2005:  Reply to comments on “Parameterization of the autoconversion process, part I:  analytical formulation of the Kessler-type parameterizations”.  J. Atmos. Sci., 62, 3007-3008

Liu, Y., P. H. Daum, and R. McGraw, 2005: Size Truncation Effect, Threshold Behavior, and a New Type of Autoconversion Parameterization. Geophys. Res. Lett, 32, L11811, doi:10.1029/2005GL022636..

Rotstayn, L. D., and Y. Liu, 2005: A smaller global estimate of the second indirect aerosol effect. Geophys. Res. Lett., 32, L05708-1-4.
McGraw, R. and Y. Liu, 2004: Analytical formulation and parameterization of the kinetic potential theory for drizzle formation. Phys. Rev. E. 70, 031606-1-13.

Liu, Y. and P. H. Daum, 2004: Parameterization of the autoconversion process. Part I: Analytical formulation of the Kessler-type parameterizations. J. Atmos. Sci, 61, 1539-1548.

Liu, Y., P. H. Daum, and R. McGraw, 2004: A new analytical expression for predicting the critical radius in the autoconversion parameterization. Geophys. Res. Lett., 31, L06121, doi:10.1029/2003GL019117.

Rotstayn, L. D., and Y. Liu, 2003: Sensitivity of the first indirect aerosol effect to an increase of cloud droplet spectral dispersion with droplet number concentration. J. Climate, 16, 3476-3481.

McGraw, R. and Y. Liu, 2003: Kinetic potential and barrier crossings: A model for warm cloud drizzle formation. Phys. Rev. Lett., 90(1), 018501-1 – 018501-4.

Liu, Y., P. H. Daum, and J. Hallett , 2002: A generalized systems theory for the effect of varying fluctuation in cloud droplet size distributions. J. Atmos. Sci, 59, 2279-2289.

Liu, Y. and P. H. Daum, 2002: Warming effect from dispersion forcing. Nature, 419, 580-581.

Liu, Y., P. H. Daum, S. K. Chai, and F. Liu, 2002: Cloud parameterizations, cloud physics, and their connections: An overview. Recent Res. Devel. Geophysics, 4, 119-142 (Invited).

Liu, Y. and P. H. Daum, 2000: Spectral dispersion of cloud droplet size distributions and the parameterization of cloud droplet effective radius. Geophy. Res. Lett. 27, 1903-1906.

Liu, Y. and P. H. Daum, 2000: The effect of refractive index on size distributions and light scattering coefficients derived from optical particle counters. J. Aerosol. Sci.. 31, 945-957.

Liu, F., H. Chen, and Y. Liu, 2000: Observational study of vertical profiles of O3 and NOx in the lower-boundary layer in Beijing area. Bulletin of China Ocean University, No.2.

Liu, Y., W. P. Arnott and J. Hallett, 1999: Particle size distribution retrieval from multispectral optical depth: Influence of particle nonsphericity and refractive index. J. Geophy. Res. D24, 31753-31762

Liu, Y., W. P. Arnott and J. Hallett, 1998:  Anomalous diffraction theory for arbitrarily oriented   finite circular cylinders and Comparisons with exact T-matrix results.  Applied Optics 37, 5019-5030.

Liu, Y., and J. Hallett, 1998: On size distributions of droplets growing by condensation:  A new conceptual model. J. Atmos. Sci.  55, 527-536.

Liu, Y., and J. Hallett, 1997: The “1/3” power-law between effective radius and liquid water content. Quart. J. Roy. Meteor. Soc. 123, 1789-1795.

Liu, Y., 1997: On the unified theory of atmospheric particle systems. Part II. Self-affine particles. Adv. Atmos. Sci., 14, 369-388.

Arnott, W. P., C. Schmitt, Y. Liu and J. Hallett, 1997: Droplet size spectra and water vapor concentration retrieval in artificial fogs by inversion of IR (500 -5000 cm ) optical depth measurements obtained with a FTIR spectrometer. Appl. Opt. 36, 5205-5216.

Arnott, W. P., Y. Liu, C. Schmitt, 1997: The unreasonable effectiveness of mimicking measured infrared extinction by hexagonal ice crystals with  Mie ice spheres. Technical Digest Series. Vol.5: Optical Remote Sensing of the Atmosphere. Optical Society of America.

Mitchell, D.L., S. K. Chai, Y. Liu, J. H. Heymsfield and Y. Dong, 1996: Modeling cirrus clouds. Part I: Treatment of bimodal size spectra and case study analysis. J. Atmos., Sci., 53, 2952-2966.

Mitchell, D. L., A. Macke, and Y. Liu, 1996: Modeling cirrus clouds. Part II: Treatment of radiative properties. J. Atmos. Sci., 53, 2967-2988.

Liu, Y., 1995: On the generalized theory of atmospheric particle systems. Adv. Atmos, Sci., 12, 419-438.

Liu, Y., L. You, W. Yang and F. Liu, 1995: On the size distribution of cloud droplets. Atmos. Res., 35, 187 -198.

You, Y. and Y. Liu, 1995: Some microphysical characteristics of cloud and precipitation over China. Atmos. Res., 35, 271 – 281.

Liu, Y., and Liu, F., 1994: On the description of aerosol particle size distributions. Atmos. Res., 34, 201-216.

Liu, Y., and You, 1994: Error analysis of GBPP-100 probe. Atmos. Res., 34, 379- 387.

Liu, Y., 1993: Statistical theory of the Marshall-Palmer distribution of raindrops. Atmos. Environ., 27A, 15-19.

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