 |
|
|
|
|
|
|
|
|
|
|
|
Severe storms: Downbursts, flash floods, hail
Lake effect snow storms (For more information on this project, click on the following link: Lake Effect)
Orographic effects on clouds and precipitation
Convective storm initiation and organization
Coupled hydrologic modeling
A list of recently-published journal articles, as well as conference papers, is given at the end of this page. Click here to jump there.
Dr. Hjelmfelt joined the Institute of Atmospheric Sciences in September 1988. He currently serves as the department chair for Atmospheric Sciences and is a professor in the Department as well. He teaches courses in Mesoscale Meteorology, Radar Meteorology, Atmospheric Dynamics, Air Quality Modeling, Numerical Weather Prediction, and Boundary Layer Meteorology.
Dr. Hjelmfelt received his B.S. degree in Physics from Kansas State University in 1969. Following a year studying meteorology at Purdue University, he entered the Air Force, serving as a Russian linguist and weather observer. While in the Air Force, he enrolled in the Department of Meteorology at the South Dakota School of Mines and Technology and received his M.S. degree in 1975. He obtained a Ph.D. degree in meteorology from the University of Chicago in 1980. From 1980 to 1982, Dr. Hjelmfelt was a Post-doctoral Fellow in the Advanced Study Program at the National Center for Atmospheric Research (NCAR).During 1982 and 1983, he was employed in the Atmospheric Sciences Group at Brookhaven National Laboratory. In 1983, he returned to NCAR as a Scientist I with the Field Observing Facility (FOF), serving as Field Manager and engaging in research on microbursts and lake effect snowstorms. In 1986, he was promoted to Scientist II and served as Acting Head of the Applied Science Group of the Research Applications Program at NCAR. Dr. Hjelmfelt joined the Institute of Atmospheric Sciences in September 1988 and currently serves as chair of the Department of Atmospheric Science.
Dr. Hjelmfelt is a member of the American Meteorological Society. He has served on the AMS Committee on Mesoscale Processes and as an Associate Editor of the Journal of Applied Meteorology. Dr. Hjelmfelt has authored or coauthored a number of papers covering topics such as mesoscale meteorology, microbursts, and cloud physics. He has participated in the scientific planning and field operations for a number of meteorological research programs, including the recent Lake-ICE experiment where he served as an ELDORA radar scientist and Operations Director. His current research interests involve both numerical and observational studies relating to the initiation and organization of cloud systems and their interactions with their environment. Numerical modeling studies have emphasized convection initiation and storm structure and the influences of orography and surface inhomogeneities on clouds and precipitation. He teaches graduate courses in mesoscale meteorology, radar, air quality modeling, and dynamics.
- Member of the American Meteorological Society and the American Geophysical Union
Schroeder, J.J., D.A.R. Kristovich, and M.R. Hjelmfelt, 2006: Boundary layer and microphysical influences of natural cloud seeding on a lake-effect snow storm. Mon. Weather Rev., 134, 1842-1857.
Bunkers, M.J., M.R. Hjelmfelt, and P.L. Smith, Jr., 2006: An observational examination of long-lived supercells. Part I: Characteristics, evolution, and demise. Wea. Foreasting, 21, 673-688.
Bunkers, M.J., J.S. Johnson, L.J. Czephya, J.M. Grzywacz, B.A. Klimowski, and M.R. Hjelmfelt, 2006: An observational examination of long-lived supercells. Part II: Environmental conditions and forecasting. Wea. Forecasting, 21, 689-714.
Hjelmfelt, M.R., 2006: “Microbursts and Macrobursts: Windshear and Blowdowns.” Chapter 3 In Plant Disturbance Ecology, The Process and Response. E.A. Johnson and K. Miyanishi, Ed., Elsevier Science, publisher.
Farley, R. D., M. R. Hjelmfelt, and S. L. Hansen, 2005: Three-dimensional Modeling of North Dakota Clouds Using a New Microphysical Scheme with Explicit Treatment of Atmospheric Aerosols and Hygroscopic Seeding Effects. 16th Conference on Planned and Inadvertent Weather Modification, San Diego, CA.
Klimowski, B.A., M.R. Hjelmfelt, and M.J. Bunkers, 2004: Radar observations of the early evolution of bow echoes. Wea. and Forecasting, 19, 727-734.
Farley, R. D., H. Chen, H. D. Orville, and M. R. Hjelmfelt, 2004: Numerical simulation of hail formation in the 28 June 1989 Bismarck Thunderstorm: Part 1I, Cloud seeding results. Atmos. Research, 71, 81-113.
Farley, R. D., T. Wu, H. D. Orville, and M. R. Hjelmfelt, 2004: Numerical simulation of hail formation in the 28 June 1989 Bismarck Thunderstorm: Part 1, Studies related to hail formation. Atmos. Research, 71, 51-79.
Kristovich, D. A. R., N. F. Laird, and M. R. Hjelmfelt, 2003: Convective evolution across Lake Michigan during a widespread lake-effect snow event. Mon. Wea. Rev., 131, 643-655.
Klimowski, B. A., M. J. Bunkers, M. R. Hjelmfelt, and J. N. Covert, 2003: Severe convective windstorms over the Northern High Plains of the United States. Wea. Forecasting., 18, 502-519.
Hjelmfelt, M.R., 2003: Microbursts and their Numerical Prediction. Preprints: Harold D. Orville Symposium, Rapid City SD, South Dakota School of Mines and Technology, Rapid City, 51-67.
Wang, J., M.R. Hjelmfelt, W.J. Capehart, and R.D. Farley, 2003: Coupled model simulation of snowfall events over the Black Hills. J. Appl. Meteor., 42, 775-796.
Young, G.S., D. A. R. Kristovich, M.R. Hjelmfelt, and R. C. Foster, 2002: Rolls, Streets, Waves and More: A Review of quasi-two dimensional structures in the atmospheric boundary layer. Bull. Amer. Meteor. Scc., 83, 997-1001.
Cooper, K.A., M.R. Hjelmfelt, R.G. Derickson, D.A.R. Kristovich, and N. Laird, 2000: Numerical simulation of transitions in boundary layer convective structures in a lake-effect snow event. Monthly Weather Review, 128, 3283-3295.
Kristovich, D.A.R., G.S. Young, J. Verlinde, P.J. Sousounis, P. Mourad, D. Lenschow, R.M. Rauber, M.K. Ramamurthy, B.F. Jewett, K. Beard, E. Cutrim, P.J. DeMott, E.W. Eloranta, M.R. Hjelmfelt, S.M. Kreidenweis, J. Martin, J. Moore, H.T. Ochs, D.C. Rogers, J. Scala, G. Tripoli, and J. Young, 2000: The Lake-Induced Convection Experiment (Lake-ICE) and the snowband dynamics project. Bull. Amer. Meteor. Soc., 81, 519-542.
Capehart, W.J., R.D. Farley, M.R. Hjelmfelt, A.D. Davis, S.J. Kenner, F. Zheng, C.A. Naus, C.S. Johnson and J. Wang, 2000: A coupled atmospheric-hydrologic model for Black Hills hydrology studies. 1999 Conference on the Hydrology of the Black Hills, Rapid City, SD, SDSM&T Bulletin No. 20, 23-28. [Available from the Department of Geology and Geological Engineering, SDSM&T, 501 E. St. Joseph Street, Rapid City, SD 57701.]
Davis, A.D., W.J. Capehart, M.R. Hjelmfelt, S.J. Kenner, C.S. Johnson, and C.A. Naus, 2000: Coupling of a ground-water model to atmospheric and surface-water models in the complex terrain of the Black Hills. 1999 Conference on the Hydrology of the Black Hills: Rapid City, SD, SDSM&T Bulletin No. 20, [Available from the Department of Geology and Geological Engineering, SDSM&T, 501 E. St. Joseph Street, Rapid City, SD 57701.]
Back
to the beginning
Back to the
IAS Faculty page
Back to the
IAS homepage