Show simple item record Cummer, Steven en_US 2011-06-21T17:27:46Z 2011-06-21T17:27:46Z 2010 en_US
dc.identifier.citation Thomas,Jeremy N.;Solorzano,Natalia N.;Cummer,Steven A.;Holzworth,Robert H.. 2010. Polarity and energetics of inner core lightning in three intense North Atlantic hurricanes. Journal of Geophysical Research-Space Physics 115( ): A00E15-A00E15. en_US
dc.identifier.issn 0148-0227 en_US
dc.description.abstract We use the World Wide Lightning Location Network (WWLLN), low-frequency magnetic fields measured at Duke University, and storm intensity data (winds and central pressure) to examine the polarity and energetics of lightning within 100 km of the centers (inner core regions) of North Atlantic hurricanes Emily, Katrina, and Rita (2005). WWLLN provides the lightning locations. Polarities, peak currents, and vertical impulse charge moment changes are derived from the Duke magnetic field measurements. In agreement with past studies, we find episodic inner core lightning outbreaks prior to and during most changes in storm intensity. A new result of our analysis indicates an increase in the relative number of positive cloud-to-ground lightning in the inner core prior to and during periods of storm weakening, which is potentially important for hurricane intensity change forecasting. Additionally, we find that the majority of inner core lightning located by WWLLN had peak currents that surpassed the threshold needed to produce optical emissions (elves) and drive electron density perturbations in the lower ionosphere (80-105 km). Since these high peak current lightning occurred in short-duration outbreaks, they had an accumulated effect on the ionospheric electron density, as shown by recent modeling studies. Our results suggest that the inner core lightning in intense hurricanes might be significant drivers of perturbations in the lower ionosphere during these inner core lightning outbreaks. en_US
dc.language.iso en_US en_US
dc.relation.isversionof doi:10.1029/2009JA014777 en_US
dc.subject location network wwlln en_US
dc.subject lower ionosphere en_US
dc.subject electromagnetic pulses en_US
dc.subject tropical cyclones en_US
dc.subject ice-scattering en_US
dc.subject sprites en_US
dc.subject elves en_US
dc.subject ionization en_US
dc.subject convection en_US
dc.subject satellite en_US
dc.subject astronomy & astrophysics en_US
dc.title Polarity and energetics of inner core lightning in three intense North Atlantic hurricanes en_US
dc.title.alternative en_US
dc.description.version Version of Record en_US 2010-3-12 en_US
duke.description.endpage A00E15 en_US
duke.description.issue en_US
duke.description.startpage A00E15 en_US
duke.description.volume 115 en_US
dc.relation.journal Journal of Geophysical Research-Space Physics en_US

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