| Volumes and Issues Contents of Issue 2 |
www.nat-hazards-earth-syst-sci.net/10/295/2010/
doi:10.5194/nhess-10-295-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Brief communication "Modeling tornado dynamics and the generation of infrasound, electric and magnetic fields"
Faculty of Engineering and Computer Science, University of Applied Sciences Osnabrueck, Albrechtstr. 30, 49076 Osnabrueck, Germany
Abstract. Recent observations endorse earlier measurements of time varying electric and magnetic fields generated by tornadoes and dust devils. These signals may provide a means for early warning but together with a proper modeling approach can also provide insight into geometry and dynamics of the vortices. Our model calculations show the existence of pressure resonances characterized as acoustic duct modes with well defined frequencies. These resonances not only generate infrasound but also modulate the charge density and the velocity field and in this way lead to electric and magnetic field oscillations in the 0.5–20-Hz range that can be monitored from a distance of several kilometers.
Full Article (PDF, 640 KB)
Citation: Schmitter, E. D.: Brief communication "Modeling tornado dynamics and the generation of infrasound, electric and magnetic fields", Nat. Hazards Earth Syst. Sci., 10, 295-298, doi:10.5194/nhess-10-295-2010, 2010. Bibtex EndNote Reference Manager XML
