J
John H. Helsdon
Researcher at South Dakota School of Mines and Technology
Publications - 28
Citations - 893
John H. Helsdon is an academic researcher from South Dakota School of Mines and Technology. The author has contributed to research in topics: Lightning & Thunderstorm. The author has an hindex of 16, co-authored 28 publications receiving 807 citations. Previous affiliations of John H. Helsdon include State University of New York System.
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Journal ArticleDOI
The Severe Thunderstorm Electrification and Precipitation Study
Timothy J. Lang,L. Jay Miller,Morris L. Weisman,Steven A. Rutledge,Llyle J. Barker,V. N. Bringi,V. Chandrasekar,Andrew G. Detwiler,Nolan J. Doesken,John H. Helsdon,Charles A. Knight,Paul R. Krehbiel,Walter A. Lyons,Donald R. MacGorman,Erik N. Rasmussen,William Rison,W. David Rust,Ronald J. Thomas +17 more
TL;DR: The STEPS project as discussed by the authors aimed to achieve a better understanding of the interactions between kinematics, precipitation, and electrification in severe thunderstorms by using a multiple-Doppler polarimetric radar network and a time-of-arrival very high frequency (VHF) lig...
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A numerical modeling study of a Montana thunderstorm: 2. Model results versus observations involving electrical aspects
TL;DR: In this article, a Storm Electrification Model (SEM) was used to simulate the July 19, 1981, Cooperative Convective Precipitation Experiment (CCOPE) case study cloud.
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An examination of thunderstorm‐charging mechanisms using a two‐dimensional storm electrification model
TL;DR: In this article, the early, prelightning, electrification of a storm resulting from noninductive charging involving graupel, cloud ice/snow, and supercooled cloud water in a riming environment is studied using a comparative approach in a two-dimensional storm electrification model.
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An intracloud lightning parameterization scheme for a storm electrification model
TL;DR: In this article, the authors implemented the parameterization of an intracloud lightning discharge in the present storm electrification model and computed the initiation, propagation direction, and termination of the discharge using the magnitude and direction of the electric field vector as the determining criteria.
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Upward lightning flashes characteristics from high‐speed videos
Marcelo M. F. Saba,Carina Schumann,Tom A. Warner,Marco A. S. Ferro,Amanda R. de Paiva,John H. Helsdon,Richard E. Orville +6 more
TL;DR: In this paper, the authors analyzed one hundred high-speed video recordings (72 cases in Brazil and 28 cases in USA) of negative upward lightning flashes were analyzed and compared with similar ones from cloud-to-ground flashes.