Severe convective storms produce a number of hazards to life, property, and agriculture. These include tornadoes, hail, damaging winds, flash floods, and lightning.
I am particularly interested in supercell storms, as these produce a disproportionate number of high-impact events such as violent tornadoes and giant hail.
My research interests include identifying and using polarimetric radar signatures in severe storms to understand the storm behavior, modeling of supercell storms and precipitation processes within them, and radar-based detection and sizing of hail.
Below is a list of my publications on severe storms and severe storm microphysics:
Jiang*, Z., M. R. Kumjian, R. S. Schrom*, I. Giammanco, T. Brown-Giammanco, H. Estes, R. Maiden, and A. Heymsfield, 2019: Comparisons of electromagnetic scattering properties of real hailstones and spheroids. Journal of Applied Meteorology and Climatology, 58, 93-112. pdf
Kumjian, M. R., Y. Richardson, T. Meyer, K. Kosiba, and J. Wurman, 2018: Resonance scattering effects in wet hail observed with the dual-X-band-frequency, dual-polarization Doppler on Wheels radar. Journal of Applied Meteorology and Climatology, 57, 2713-2731. pdf
Loeffler*, S., and M. R. Kumjian, 2018: Quantifying the separation of enhanced ZDR and KDP regions in nonsupercell tornadic storms. Weather and Forecasting, 33, 1143-1157. pdf
Li*, M., F. Zhang, Q. Zhang, J. Harrington, and M. R. Kumjian, 2017: Nonlinear response of hail precipitation rate to environmental moisture content: a real case modeling study of an episodic midlatitude severe convective event. Journal of Geophysical Research – Atmospheres, 122, 6729-6747. pdf
Dennis*, E. J., and M. R. Kumjian, 2017: The impact of vertical wind shear on hail growth in simulated supercells. Journal of the Atmospheric Sciences, 74, 641-663. pdf
Snyder, J.C., A.V. Ryzhkov, M.R. Kumjian, A.P. Khain, and J.C. Picca, 2015: A ZDR column detection algorithm to examine convective storm updrafts. Weather and Forecasting, 30, 1819-1844. pdf
Markowski, P.M., Y.P. Richardson, M.R. Kumjian, A. Anderson-Frey, G. Jimenez, B. Katona, A. Klees, R. Schrom, and D. Tobin, 2015: Comments on “Observations of wall cloud formation in supercell thunderstorms during VORTEX2.” Monthly Weather Review, 143, 4278-4281. pdf
Kumjian, M.R., Z.J. Lebo, and H.C. Morrison, 2015: On the mechanisms of rain formation in an idealized supercell storm. Monthly Weather Review, 143, 2754-2773. pdf
Homeyer, C.R., and M.R. Kumjian, 2014: Microphysical characteristics of overshooting convection from polarimetric radar observations. Journal of the Atmospheric Sciences, in press.
Kumjian, M.R., A. P. Khain, N. Benmoshe, E. Ilotoviz, A.V. Ryzhkov, and V. T. J. Phillips, 2014: The anatomy and physics of ZDR columns: Investigating a polarimetric radar signature with a spectral bin microphysical model. Journal of Applied Meteorology and Climatology, 53, 1820-1843. pdf
Dawson, D.T., E.R. Mansell, Y. Jung, L.J. Wicker, M.R. Kumjian, and M. Xue, 2014: Low-level ZDR signatures in supercell forward flanks: the role of size sorting and melting of hail. Journal of the Atmospheric Sciences, 71, 276-299. pdf
Ryzhkov, A.V., M.R. Kumjian, S.M. Ganson, and P. Zhang, 2013: Polarimetric radar characteristics of melting hail. Part II: Practical applications. J. Applied Meteorology and Climatology, 52, 2871-2886. pdf
Ryzhkov, A.V., M.R. Kumjian, S.M. Ganson, and A.P. Khain, 2013: Polarimetric radar characteristics of melting hail. Part I: Theoretical simulations using spectral microphysical modeling. J. Applied Meteorology and Climatology, 52, 2849-2870. pdf
Bodine, D.J., M.R. Kumjian, R.D. Palmer, P.L. Heinselman, and A.V. Ryzhkov, 2013: Tornado damage estimation using polarimetric radar. Weather and Forecasting, 28, 139-158. pdf
Kumjian, M.R., S. Ganson, and A.V. Ryzhkov, 2012: Raindrop freezing in deep convective updrafts: A microphysical and polarimetric model. Journal of the Atmospheric Sciences, 69, 3471-3490. pdf
Crowe, C.C., C.J. Schultz, M.R. Kumjian, L.D. Carey, and W.A. Petersen, 2012: Use of dual-polarization signatures in diagnosing tornadic potential. Electronic Journal of Operational Meteorology, 13(5), 57-78. pdf
Kumjian, M.R., 2011: Precipitation properties of supercell hook echoes. Electronic Journal of Severe Storms Meteorology, 6(5), 1-21. pdf
Palmer, R.D., D. Bodine, M.R. Kumjian, B. Cheong, G. Zhang, Q. Cao, H.B. Bluestein, A. Ryzhkov, T.-Y. Yu, and Y. Wang, 2011: Observations of the 10 May 2010 tornado outbreak using OU-PRIME: Potential for new science with high-resolution polarimetric radar. Bulletin of the American Meteorological Society, 92, 871-891. pdf
Kumjian, M.R., A.V. Ryzhkov, V.M. Melnikov, and T.J. Schuur, 2010: Rapid-scan super-resolution observations of a cyclic supercell with a dual-polarization WSR-88D. Monthly Weather Review, 138, 3762-3786. pdf
Kumjian, M.R. and A.V. Ryzhkov, 2009: Storm-relative helicity revealed from polarimetric radar observations. Journal of the Atmospheric Sciences, 66, 667–685. pdf
Kumjian, M.R. and A.V. Ryzhkov, 2008: Polarimetric signatures in supercell thunderstorms. Journal of Applied Meteorology and Climatology, 47, 1940-1961. pdf
Kumjian, M.R. and B.H. Fiedler, 2007: The efficacy of subsidence warming in tornadoes. Conference Notebook, Bulletin of the American Meteorological Society, 88, 1538-1539.