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dc.contributor.authorLevina, G.V.
dc.contributor.authorMontgomery, M.T.
dc.date.accessioned2014-10-17T21:58:15Z
dc.date.available2014-10-17T21:58:15Z
dc.date.issued2011
dc.identifier.citationJournal of Physics: Conference Series 318 (2011) 072012, 13th European Turbulence Conference (ETC13)
dc.identifier.urihttp://hdl.handle.net/10945/43566
dc.descriptionThe article of record as published may be located at http://dx.doi.org/10.1088/1742-6596/318/7/072012en_US
dc.description.abstractA helical scenario of tropical cyclogenesis and further vortex intensification is proposed based on results of direct numerical simulation of atmospheric flows. The main idea of the scenario consists in a specific topology of helical flows which are characterized by the linkage of vortex lines. Velocity fields resulting from a high resolution numerical simulation by the Regional Atmospheric Modeling System (RAMS) are used to calculate helical and integral characteristics during a tropical cyclone formation. It is shown how non-zero mean helicity is generated by moist convective atmospheric turbulence, which implies a new flow topology with linked vortex lines. A possible role of vortical hot towers (VHTs) is discussed in generating the linkage. It is shown that the linkage results in a positive feedback between the horizontal and vertical circulation in the formation of a larger-scale vortex and contributes to the instability of the macro vortex.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleHelical scenario of tropical cyclone genesis and intensificationen_US
dc.typeArticleen_US
dc.contributor.departmentMeteorology


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