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Directory  |   Faculty  |   Students  |   Alumni  |   Dean's Council
Edmund K.M. Chang  

Edmund K.M. Chang
Professor

Ph.D., 1993, Princeton University

E-mail: kar.chang@stonybrook.edu
telephone: (631)632-6170

Atmospheric dynamics and diagnoses, climate dynamics, synoptic meteorology.

Web page


Research Interests

My main research focus is on investigating the large scale dynamics of the mid-latitude troposphere. The phenomena that I have investigated range from baroclinic waves/cyclones up to storm tracks and the large scale mean circulation. The distinctive characteristic of my research lies in the fact that I employ a wide range of tools in my research, ranging from analyses of gridded atmospheric analyses and GCM simulations to learn about the basic characteristics of the phenomena, examination of actual observations to validate what have been learnt from the gridded data, and dynamical studies using a suite of intermediate/mechanistic models to achieve better understanding of these observed phenomena. My major research interests and some selected publications are listed below. For more details and a complete list of publications, see my web page.

Major research topics

  • Variability and trends of storm tracks
  • Storm track dynamics
  • Dynamics and life cycle of baroclinic waves and cyclones
  • Wave/mean flow interactions
  • Tropical/extratropical interactions, tropical meteorology

Selected Publications

Chang, E.K.M., 2008: Diabatic and orographic forcing of Northern winter stationary waves and storm tracks. Submitted to J. Climate.

Guo, Y, and E.K.M. Chang, 2008: Impacts of assimilation of satellite and rawinsonde observations on Southern Hemisphere baroclinic wave activity in the NCEP/NCAR reanalysis. J. Climate, accepted.

Chang, E.K.M., and Y. Guo, 2007: Is the number of North Atlantic tropical cyclones significantly underestimated prior to the availability of satellite observations? Geophysical Research Letters, 34, L14801, doi: 10.1029/2007GL030169.

Chang, E.K.M., 2007: Assessing the increasing trend in Northern Hemisphere winter storm track activity using surface ship observations and statistical storm track model. J. Climate, 20, 5607-5628.

Yang, X., and E.K.M. Chang, 2007: Eddy-zonal flow feedback in the Southern Hemisphere winter and summer. J. Atmos. Sci., 64, 3091-3112.

Chang, E.K.M., and P. Zurita-Gotor, 2007: Simulating the Seasonal Cycle of the Northern Hemisphere Storm Tracks Using Idealized Nonlinear Storm Track Models. J. Atmos. Sci., 64, 2309-2331.

Chang, E.K.M., 2006: An idealized nonlinear model of the Northern Hemisphere winter storm tracks. J. Atmos. Sci., 63, 1818-1839.

Chang, E.K.M., 2005: The impact of wave packets propagating across Asia on Pacific cyclone development. Mon. Wea. Rev., 133, 1998-2015.

Chang, E.K.M., and Y.F. Fu, 2003: Using Mean flow change as a proxy to infer interdecadal storm track variability. J. Climate, 16, 2178-2196.

Harnik, N., and E.K.M. Chang, 2003: Storm track variations as seen in radiosonde observations and reanalysis data. J. Climate, 16, 480-495.

Chang, E.K.M., S. Lee, and K.L. Swanson, 2002: Storm track dynamics. J. Climate, 15, 2163-2183.

Chang, E.K.M., and Y.F. Fu, 2002: Inter-decadal variations in Northern Hemisphere winter storm track intensity. J. Climate, 15, 642-658.

Chang, E.K.M., 2000: Wave packets and life cycles of troughs in the upper troposphere: Examples from the Southern Hemisphere summer season of 1984/85. Monthly Weather Review, 128, 25.

Chang, E.K.M., and D.B. Yu, 1999: Characteristics of wave packets in the upper troposphere. Part I: Northern Hemisphere winter. Journal of the Atmospheric Sciences, 56, 1708.

Chang, E.K.M., 1999: Characteristics of wave packets in the upper troposphere. Part II: Seasonal and hemispheric variations. Journal of the Atmospheric Sciences, 56, 1729.

Chang, E.K.M., 1995: The Influence of Hadley Circulation Intensity Changes on Extratropical Climate in an idealized model. J. Atmos. Sci., 52, 2006-2024.

Chang, E.K.M., and I. Orlanski, 1993: On the Dynamics of a Storm Track. J. Atmos. Sci., 50, 999-1015

Chang, E.K.M., 1993: Downstream Development of Baroclinic Waves as Inferred from Regression Analysis. J. Atmos. Sci., 50, 2038-2053.

Chang, K.M., and J.P. Ostriker, 1985: Standing Shocks in Accretion Flows onto Black Holes. Astrophysical J., 288, 428-437.

Chang, K.M., and N.D. Kylafis, 1983: Spectral and Temporal Effects of a Plasma Shell around an X-ray Source. Astrophysical J., 265, 1005-1020.


 

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