Xun Zhu Print


  240-228-8764

  Xun.Zhu@jhuapl.edu

: SES

:   None

:  Earth, Planetary

 
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Degree Field of Study Year Attained Institution Name
Doctor of Philosophy Atmospheric Sciences 1987 University of Washington
Bachelor of Science Meteorology 1982 Nanjing Institute of Meteorology

            Dr. Xun Zhu received his Ph.D. from the University of Washington Department of Atmospheric Sciences in 1987. He has been working on many problems in the Earth’s middle atmosphere and planetary atmospheres, primarily in the areas of atmospheric dynamics and radiation. As a result, Dr. Zhu has published more than 60 papers in refereed scientific journals, over 40 as first author. He is the chief editor of a book (“Observation, Theory and Modeling of Atmospheric Variability”) that has been on publisher’s list of monthly best sellers for several months.  Over the years, Dr. Zhu has developed an accurate and efficient algorithm to calculate the net radiative heating rate in the middle atmosphere, and this algorithm has been implemented in the middle atmosphere models of many research groups around the world. He has also developed the JHU/APL 2-D model and a spectral tidal model for modeling the chemistry, dynamics and transport in the Earth middle atmosphere. Dr. Zhu’s broad background in theoretical physics and applied mathematics, coupled with his extensive programming experience, has led him to work on several comprehensive problems regarding the outer planets and their satellites, including the development of various models for the atmospheres of Pluto, Titan, Triton and Io. He also solved conclusively a long-standing problem of equatorial superrotation in a slowly rotating planetary atmosphere.

            In addition, Dr. Xun Zhu has made important contributions to the fields other than his home field of atmospheric sciences, including data analysis technique based on continuous wavelet transform, optimization algorithm based on the adaptive simultaneous perturbation stochastic approximation method, and numerical modeling of laser ablation processes.

 
AGU Index Category AGU Index Sub-Category
ATMOSPHERIC COMPOSITION AND STRUCTURE Middle atmosphere: composition and chemistry
ATMOSPHERIC COMPOSITION AND STRUCTURE Middle atmosphere: energy deposition
ATMOSPHERIC PROCESSES Mesospheric dynamics
ATMOSPHERIC PROCESSES Climate change and variability
ATMOSPHERIC PROCESSES Middle atmosphere dynamics
SPACE WEATHER Ionospheric effects on radio waves
PLANETARY SCIENCES: SOLID SURFACE PLANETS Atmospheres
PLANETARY SCIENCES: COMETS AND SMALL BODIES Atmospheres
ATMOSPHERIC PROCESSES Idealized model
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Start Year End Year Description
1987 1989 Postdoctoral research at Princeton University
1989 1997 Research Scientist at Johns Hopkins University
1997 Current Senior Professional Staff at the Johns Hopkins University Applied Physics Laboratory
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The following publication information was downloaded from http://www.researcherId.com/rid/C-2097-2016.
Lellouch, E., Gurwell, M., Butler, B., Fouchet, T., Lavvas, P., Strobel, D. F., Sicardy, B., Moullet, A., Moreno, R., Bockelee-Morvan, D., Biver, N., Young, L., Lis, D., Stansberry, J., Stern, A., Weaver, H., Young, E., Zhu, X., Boissier, J., (2017), Detection of CO and HCN in Pluto's atmosphere with ALMA, Icarus, 286, 289-307

Sawyer, Carolyn, Iyer, Kaushik, Zhu, Xun, Kelly, Michael, Luke, Darren, Amdahl, David, (2017), Two-dimensional laser-induced thermal ablation modeling with integrated melt flow and vapor dynamics, Journal of Laser Applications, 29

Strobel, Darrell F., Zhu, Xun, (2017), Comparative planetary nitrogen atmospheres: Density and thermal structures of Pluto and Triton, Icarus, 291, 55-64

Gladstone, G. Randall, Stern, S. Alan, Ennico, Kimberly, Olkin, Catherine B., Weaver, Harold A., Young, Leslie A., Summers, Michael E., Strobel, Darrell F., Hinson, David P., Kammer, Joshua A., Parker, Alex H., Steffl, Andrew J., Linscott, Ivan R., Parker, Joel Wm., Cheng, Andrew F., Slater, David C., Versteeg, Maarten H., Greathouse, Thomas K., Retherford, Kurt D., Throop, Henry, Cunningham, Nathaniel J., Woods, William W., Singer, Kelsi N., Tsang, Constantine C. C., Schindhelm, Eric, Lisse, Carey M., Wong, Michael L., Yung, Yuk L., Zhu, Xun, Curdt, Werner, Lavvas, Panayotis, Young, Eliot F., Tyler, G. Leonard, New Horizons Sci Team, (2016), The atmosphere of Pluto as observed by New Horizons, Science, 351, 1280-+

Talaat, Elsayed R., Zhu, Xun, (2016), Spatial and temporal variation of total electron content as revealed by principal component analysis, Annales Geophysicae, 34, 1109-1117

Zhu, Xun, Yee, Jeng-Hwa, Cai, Ming, Swartz, William H., Coy, Lawrence, Aquila, Valentina, Garcia, Rolando, Talaat, Elsayed R., (2016), Diagnosis of Middle-Atmosphere Climate Sensitivity by the Climate Feedback-Response Analysis Method, Journal of the Atmospheric Sciences, 73, 3-23

Toigo, Anthony D., French, Richard G., Gierasch, Peter J., Guzewich, Scott D., Zhu, Xun, Richardson, Mark I., (2015), General circulation models of the dynamics of Pluto's volatile transport on the eve of the New Horizons encounter, Icarus, 254, 306-323

Zhu, Xun, Strobel, Darrell F., Erwin, Justin T., (2014), The density and thermal structure of Pluto's atmosphere and associated escape processes and rates, Icarus, 228, 301-314

Zhu, Xun, Lui, A. T. Y., (2012), Reconstruction of neighboring plasma environment along a satellite path by a barotropic plasma model, Journal of Atmospheric and Solar-Terrestrial Physics, 77, 46-56

Eckermann, Stephen D., Ma, Jun, Zhu, Xun, (2011), Scale-dependent infrared radiative damping rates on Mars and their role in the deposition of gravity-wave momentum flux, Icarus, 211, 429-442

Zalucha, Angela M., Gulbis, Amanda A. S., Zhu, Xun, Strobel, Darrell F., Elliot, J. L., (2011), An analysis of Pluto occultation light curves using an atmospheric radiative-conductive model, Icarus, 211, 804-818

Zalucha, Angela M., Zhu, Xun, Gulbis, Amanda A. S., Strobel, Darrell F., Elliot, J. L., (2011), An investigation of Pluto's troposphere using stellar occultation light curves and an atmospheric radiative-conductive-convective model, Icarus, 214, 685-700

Zhu, Xun, Yee, Jeng-Hwa, Swartz, William H., Talaat, Elsayed R., (2011), Comments on "A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves" Reply, Journal of the Atmospheric Sciences, 68, 2470-2477

Zhu, X., Oman, L. D., Waugh, D. W., Lloyd, S. A., (2010), Equatorial Superrotation on Earth Induced by Optically Thick Dust Clouds, Johns Hopkins Apl Technical Digest, 28, 240-241

Zhu, Xun, Yee, Jeng-Hwa, Swartz, William H., Talaat, Elsayed R., Coy, Lawrence, (2010), A Spectral Parameterization of Drag, Eddy Diffusion, and Wave Heating for a Three-Dimensional Flow Induced by Breaking Gravity Waves, Journal of the Atmospheric Sciences, 67, 2520-2536

Zhu, Xun, Strobel, Darrell F., Flasar, Michael F., (2008), Exchange of global mean angular momentum between an atmosphere and its underlying planet, Planetary and Space Science, 56, 1524-1531

Zhu, Xun, Yee, Jeng-Hwa, Talaat, E. R., Mlynczak, M., Russell, J. M., III, (2008), Diagnostic Analysis of Tidal Winds and the Eliassen-Palm Flux Divergence in the Mesosphere and Lower Thermosphere from TIMED/SABER Temperatures, Journal of the Atmospheric Sciences, 65, 3840-3859

Zhu, Xun, Yee, Jeng-Hwa, (2007), Wave-photochemistry coupling and its effect on water vapor, ozone and airglow variations in the atmosphere of Mars, Icarus, 189, 136-150

Zhu, Xun, Yee, Jeng-Hwa, Talaat, Elsayed R., (2007), Effect of dynamical-photochemical coupling on oxygen airglow emission and implications for daytime ozone retrieved from 1.27 mu m emission, Journal of Geophysical Research-Atmospheres, 112

Akmaev, R. A., Fomichev, V. I., Zhu, X., (2006), Impact of middle-atmospheric composition changes on greenhouse cooling in the upper atmosphere, Journal of Atmospheric and Solar-Terrestrial Physics, 68, 1879-1889

Zhu, Xun, (2006), Maintenance of equatorial superrotation in the atmospheres of Venus and Titan, Planetary and Space Science, 54, 761-773

Zhu, X, (2005), Dynamics in planetary atmospheric physics: Comparative studies of equatorial superrotation for Venus, Titan, and Earth, Johns Hopkins Apl Technical Digest, 26, 164-174

Zhu, X, Strobel, DF, (2005), On the maintenance of thermal wind balance and equatorial superrotation in Titan's stratosphere, Icarus, 176, 331-350

Zhu, X, Talaat, ER, Baker, JBH, Yee, JH, (2005), A self-consistent derivation of ion drag and Joule heating for atmospheric dynamics in the thermosphere, Annales Geophysicae, 23, 3313-3322

Zhu, X, Yee, JH, Talaat, ER, Mlynczak, M, Gordley, L, Mertens, C, Russell, JM, (2005), An algorithm for extracting zonal mean and migrating tidal fields in the middle atmosphere from satellite measurements: Applications to TIMED/SABER-measured temperature and tidal modeling, Journal of Geophysical Research-Atmospheres, 110

Zhu, X, (2003), Parameterization of the non-local thermodynamic equilibrium source function with chemical production by an equivalent two-level model, Advances in Atmospheric Sciences, 20, 487-495

Zhu, X, Yee, JH, Talaat, ER, (2003), Effect of short-term solar ultraviolet flux variability in a coupled model of photochemistry and dynamics, Journal of the Atmospheric Sciences, 60, 491-509

Talaat, ER, Yee, JH, Zhu, X, (2002), The 6.5-day wave in the tropical stratosphere and mesosphere, Journal of Geophysical Research-Atmospheres, 107

Zhu, X, Spall, JC, (2002), A modified second-order SPSA optimization algorithm for finite samples, International Journal of Adaptive Control and Signal Processing, 16, 397-409

DeMajistre, R, Yee, JH, Zhu, X, (2001), Parameterizations of oxygen photolysis and energy deposition rates due to solar energy absorption in the Schumann-Runge continuum, Geophysical Research Letters, 28, 3163-3166

Talaat, ER, Yee, JH, Zhu, X, (2001), Observations of the 6.5-day wave in the mesosphere and lower thermosphere, Journal of Geophysical Research-Atmospheres, 106, 20715-20723

Zhu, X, Yee, JH, Talaat, ER, (2001), Diagnosis of dynamics and energy balance in the mesosphere and lower thermosphere, Journal of the Atmospheric Sciences, 58, 2441-2454

Elliot, JL, Strobel, DF, Zhu, X, Stansberry, JA, Wasserman, LH, Franz, OG, (2000), The thermal structure of Triton's middle atmosphere, Icarus, 143, 425-428

Zhu, X, Yee, JH, Strobel, DF, (2000), Middle atmosphere age of air in a globally balanced two-dimensional model, Journal of Geophysical Research-Atmospheres, 105, 15201-15212

Zhu, X, Yee, JH, Strobel, DF, Siskind, DE, Eckermann, SD, Summers, ME, (2000), Coupled models of photochemistry and dynamics in the mesosphere and lower thermosphere, Atmospheric Science Across the Stratopause, 123, 337-342

Bristow, WA, Yee, JH, Zhu, X, Greenwald, RA, (1999), Simultaneous observations of the July 1996 2-day wave event using the Super Dual Auroral Radar Network and the High Resolution Doppler Imager, Journal of Geophysical Research-Space Physics, 104, 12715-12721

Zhu, X, Yee, JH, Lloyd, SA, Strobel, DF, (1999), Numerical modeling of chemical-dynamical coupling in the upper stratosphere and mesosphere, Journal of Geophysical Research-Atmospheres, 104, 23995-24011

Zhu, X, Yee, JH, Strobel, DF, Wang, XL, Greenwald, RA, (1999), On the numerical modelling of middle atmosphere tides, Quarterly Journal of the Royal Meteorological Society, 125, 1825-1857

Zhu, X, (1997), A new parameterization of scale-dependent radiative rates in the stratosphere - Comment, Journal of the Atmospheric Sciences, 54, 1388-1392

Zhu, X, Shen, Z, Eckermann, SD, Bittner, M, Hirota, I, Yee, JH, (1997), Gravity wave characteristics in the middle atmosphere derived from the Empirical Mode Decomposition method, Journal of Geophysical Research-Atmospheres, 102, 16545-16561

Zhu, X, Swaminathan, PK, Yee, JH, Strobel, DF, Anderson, D, (1997), A globally balanced two-dimensional middle atmosphere model: Dynamical studies of mesopause meridional circulation and stratosphere-mesosphere exchange, Journal of Geophysical Research-Atmospheres, 102, 13095-13112

Strobel, DF, Zhu, X, Summers, ME, Stevens, MH, (1996), On the vertical thermal structure of Pluto's atmosphere, Icarus, 120, 266-289

BACMEISTER, JT, SCHOEBERL, MR, SUMMERS, ME, ROSENFIELD, JR, ZHU, X, (1995), DESCENT OF LONG-LIVED TRACE GASES IN THE WINTER POLAR VORTEX, Journal of Geophysical Research-Atmospheres, 100, 11669-11684

Zhu, X, (1995), On overlapping absorption of a gas mixture, Theoretical and Applied Climatology, 52, 135-142

BALLESTER, GE, MCGRATH, MA, STROBEL, DF, ZHU, X, FELDMAN, PD, MOOS, HW, (1994), DETECTION OF THE SO2 ATMOSPHERE ON IO WITH THE HUBBLE-SPACE-TELESCOPE, Icarus, 111, 2-17

STROBEL, DF, ZHU, X, SUMMERS, ME, (1994), ON THE VERTICAL THERMAL STRUCTURE OF IOS ATMOSPHERE, Icarus, 111, 18-30

ZHU, X, (1994), A NEW THEORY OF THE SATURATED GRAVITY-WAVE SPECTRUM FOR THE MIDDLE ATMOSPHERE, Journal of the Atmospheric Sciences, 51, 3615-3626

ZHU, X, (1994), AN ACCURATE AND EFFICIENT RADIATION ALGORITHM FOR MIDDLE ATMOSPHERE MODELS, Journal of the Atmospheric Sciences, 51, 3593-3614

ZHU, X, ARKING, A, (1994), COMPARISON OF DAILY AVERAGED REFLECTION, TRANSMISSION, AND ABSORPTION FOR SELECTED RADIATIVE FLUX-TRANSFER APPROXIMATIONS, Journal of the Atmospheric Sciences, 51, 3580-3592

STROBEL, DF, HALL, DT, ZHU, X, SUMMERS, ME, (1993), UPPER LIMIT ON TITANS ATMOSPHERIC ARGON ABUNDANCE, Icarus, 103, 333-336

ZHU, X, (1993), RADIATIVE DAMPING REVISITED - PARAMETERIZATION OF DAMPING RATE IN THE MIDDLE ATMOSPHERE, Journal of the Atmospheric Sciences, 50, 3008-3021

STROBEL, DF, SUMMERS, ME, ZHU, X, (1992), TITANS UPPER-ATMOSPHERE - STRUCTURE AND ULTRAVIOLET EMISSIONS, Icarus, 100, 512-526

ZHU, X, (1992), THE CORRELATED-KAPPA COEFFICIENTS CALCULATED BY RANDOM BAND MODELS, Journal of Quantitative Spectroscopy & Radiative Transfer, 47, 159-170

ZHU, X, STROBEL, DF, (1992), NONLINEAR SATURATION OF BAROCLINIC INSTABILITY IN 2-LAYER MODELS, Journal of the Atmospheric Sciences, 49, 1961-1967

ZHU, X, SUMMERS, ME, STROBEL, DF, (1992), CALCULATION OF CO2 15-MU-M BAND ATMOSPHERIC COOLING RATES BY CURTIS MATRIX INTERPOLATION OF CORRELATED-K COEFFICIENTS, Journal of Geophysical Research-Atmospheres, 97, 12787-12797

ZHU, X, (1991), SPECTRAL PARAMETERS IN BAND MODELS WITH DISTRIBUTED LINE INTENSITY, Journal of Quantitative Spectroscopy & Radiative Transfer, 45, 33-46

ZHU, X, STROBEL, DF, (1991), RADIATIVE DAMPING IN THE UPPER MESOSPHERE, Journal of the Atmospheric Sciences, 48, 184-199

ZHU, X, SUMMERS, ME, STROBEL, DF, (1991), ANALYTIC MODELS FOR THE OZONE RADIATIVE ABSORPTION RATE AT 9.6-MU-M IN THE MESOSPHERE, Journal of Geophysical Research-Atmospheres, 96, 18551-18559

SUMMERS, ME, STROBEL, DF, BEVILACQUA, RM, ZHU, X, DELAND, MT, ALLEN, M, KEATING, GM, (1990), A MODEL STUDY OF THE RESPONSE OF MESOSPHERIC OZONE TO SHORT-TERM SOLAR ULTRAVIOLET FLUX VARIATIONS, Journal of Geophysical Research-Atmospheres, 95, 22523-22538

ZHU, X, STROBEL, DF, (1990), ON THE ROLE OF VIBRATON-VIBRATION TRANSITIONS IN RADIATIVE COOLING OF THE CO2 15 MU-M BAND AROUND THE MESOPAUSE, Journal of Geophysical Research-Atmospheres, 95, 3571-3577

ZHU, X, (1989), RADIATIVE COOLING CALCULATED BY RANDOM BAND MODELS WITH S-1-BETA TAILED DISTRIBUTION, Journal of the Atmospheric Sciences, 46, 511-520

ZHU, X, (1988), AN IMPROVED VOIGT LINE APPROXIMATION FOR THE CALCULATIONS OF EQUIVALENT WIDTH AND TRANSMISSION, Journal of Quantitative Spectroscopy & Radiative Transfer, 39, 421-427

ZHU, X, HOLTON, JR, (1987), MEAN FIELDS INDUCED BY LOCAL GRAVITY-WAVE FORCING IN THE MIDDLE ATMOSPHERE, Journal of the Atmospheric Sciences, 44, 620-630

ZHU, X, HOLTON, JR, (1986), PHOTOCHEMICAL DAMPING OF INERTIO GRAVITY-WAVES, Journal of the Atmospheric Sciences, 43, 2578-2584

HOLTON, JR, ZHU, X, (1984), A FURTHER STUDY OF GRAVITY-WAVE INDUCED DRAG AND DIFFUSION IN THE MESOSPHERE, Journal of the Atmospheric Sciences, 41, 2653-2662