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September 02, 2004 - (date of web publication)

Speakers' Biographies




Dr. J. Marshall Shepherd



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Dr. J. Marshall Shepherd


Dr. J. Marshall Shepherd is a research meteorologist in the Laboratory for Atmospheres at NASA-Goddard Space Flight Center in Greenbelt, Maryland. For the past 11 years, he has conducted research into mesoscale weather systems (e.g., thunderstorms, hurricanes) using aircraft, satellites, radars, and sophisticated computer models. This research seeks to understand large atmospheric processes and to relate them to current weather and climate change. Dr. Shepherd has been an integral part of new satellite missions with the goal of understanding the global energy and water cycle and its roles in weather and climate change. He is currently serving as Deputy Project Scientist for the Global Precipitation Measurement mission. Additionally, Dr. Shepherd seeks to integrate new science knowledge from NASA missions into real-life applications and decision-making processes.

Dr. Shepherd provides service to NASA and the larger scientific and educational communities and recently was a recipient of the Presidential early career award recipient, which is the highest federal government award given to young scientist and engineers. He received the award May 4th 2004 at the White House. Dr. Shepherd received his B.S., M.S. and Ph.D. in physical meteorology from Florida State University. He has published numerous papers and presented many oral presentations, and made many media (TV and radio) appearances as a NASA expert on weather, climate, and remote sensing. Dr. Shepherd is frequently asked to present findings and results to key personnel at NASA, the Office of Management and Budget, the Office of Science and Technology Policy, the Department of Defense, and to officials from foreign countries. Dr. Shepherd also recently co-authored a children’s book on conducting weather-related science projects and understanding basic weather information.

Dr. Jeffrey Halverson



image of Dr. Jeffrey Halverson

Dr. Jeffrey Halverson


Jeffrey Halverson is Associate Professor of Geography at the University of Maryland Baltimore County and a research scientist at NASA's Goddard Space Flight Center. He received his Ph.D. in Environmental Sciences from the University of Virginia. At UMBC, Dr. Halverson teaches introductory courses on tropical meteorology, weather and climate. At his NASA job, he conducts research on precipitating cloud systems and tropical cyclones around the globe, and has published over twenty professional papers. He also serves as the Education and Outreach Scientist for NASA's Tropical Rainfall Measurement Mission satellite. He frequently conducts star tours and lectures on climate at Virginia's Wintergreen Nature Foundation. Dr. Halverson also writes feature articles and the monthly Highlights column in Weatherwise magazine.

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