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Polarimetric and multi-doppler radar observations of sprite-producing storms
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cummer, Steven A. Rison, William Krehbiel, Paul Dolan, Brenda Lyons, Walter A. Rutledge, Steven A. Lang, TImothy J. |
| Copyright Year | 2014 |
| Description | Sprites are caused by luminous electrical breakdown of the upper atmosphere, and frequently occur over large mesoscale precipitation systems. Two spriteâproducing storms (on 8 and 25 June) were observed in Colorado during the summer of 2012. Unlike most past studies of sprites, these storms were observed by a polarimetric radar â the CSUâCHILL facility â which provided both PPI and RHI scans of the cases. Also available were multipleâDoppler syntheses from CSUâCHILL, local NEXRAD radars, and the CSUâPawnee radar; as well as data from the Colorado Lightning Mapping Array (COLMA), high speed cameras, and other lightningâdetection instrumentation. This unique dataset provided an unprecedented look at the detailed kinematic and microphysical structures of the thunderstorms as they produced sprites, including electrical alignment signatures in the immediate location of the charge layers neutralized by spriteâparent positive cloudâtoâground lightning strokes. One of the spriteâproducing cases (25 June) featured an anomalous charge structure and may serve as a model for how sprites can be produced over convection rather than the more typical stratiform regions. Also to be presented will be evidence for advection of charge into a common stratiform precipitation region (on 8 June), which was then tapped by lightning originating from multiple different convective cores to produce sprites. Depending on the outcome of the 2013 convective season, polarimetric data from additional storms that produce sprites and other transient luminous events (TLEs) may be presented. |
| File Size | 41728 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140003203 |
| Archival Resource Key | ark:/13960/t46q6zd26 |
| Language | English |
| Publisher Date | 2014-09-16 |
| Access Restriction | Open |
| Subject Keyword | Meteorology And Climatology Meteorological Radar Lightning Summer Polarimetry Upper Atmosphere Doppler Radar Signatures Electrical Faults Convection High Speed Cameras Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
