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Observational evidence for exponential tornado distributions over specific kinetic energy

Dotzek, Nikolai and Kurgansky, Michael V. and Grieser, Jürgen and Feuerstein, Bernold and Nevir, Peter (2005) Observational evidence for exponential tornado distributions over specific kinetic energy. Geophysical Research Letters, 32. Wiley. DOI: 10.1029/2005GL024583

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Official URL: http://www.agu.org/journals/gl/gl0524/2005GL024583/2005GL024583.pdf


Observational evidence supports the recent analytical prediction that tornado intensities are exponentially distributed over peak wind speed squared (v 2), or equivalently, Rayleigh-distributed over v. For large USA data samples, exponential tails are found in the tornado intensity distributions over v 2 from about F2 intensity on. Similar results follow for smaller worldwide data samples. For the 1990s data from the USA and Oklahoma, deviations from the Rayleigh distribution for weak tornadoes can be explained by the emergence of a separate, likely non-mesocyclonic tornado mode. These bimodal datasets can be modeled by superposition of two Rayleigh distributions. The change in modal dominance occurs at about the F2 threshold (v ≈ 50 m s−1). In France, likely mainly the mesocyclonic tornado mode has been recorded, while in the UK, only a non-mesocyclonic mode seems to be present.

Item URL in elib:https://elib.dlr.de/20893/
Document Type:Article
Title:Observational evidence for exponential tornado distributions over specific kinetic energy
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kurgansky, Michael V.Universidad de Concepcion, ChileUNSPECIFIED
Grieser, JürgenDWD, OffenbachUNSPECIFIED
Feuerstein, BernoldMPI für Kernphysik, HeidelbergUNSPECIFIED
Nevir, PeterFU BerlinUNSPECIFIED
Date:28 December 2005
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1029/2005GL024583
Keywords:Tornado, Intensity distribution, Kinetic energy density
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dotzek, Dr.rer.nat. Nikolai
Deposited On:16 Apr 2007
Last Modified:08 Mar 2018 18:28

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