Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure

Details Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmae11a..05c&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #AE11A-05

Other

0342 Middle Atmosphere: Energy Deposition (3334), 3304 Atmospheric Electricity, 3324 Lightning

Scientific paper

During the 2005 summer observation campaign at Yucca Ridge, Colorado, numerous instruments aimed at observations of high altitude optical emissions driven by lightning. Included in this set were a flexible intensified high speed camera (Vision Research Phantom 7.1) and wideband magnetic field sensors (0.1 Hz to 30 kHz, built by QUASAR, Inc.) that were employed in an effort to probe the details of the connection between the low altitude lightning processes and high altitude transient luminous events (TLEs). The low frequency sensitivity of the magnetic field sensors enabled measurement of the continuing lightning current that is involved in many of the complex sprites but that can be difficult to detect by other means, while the high speed video gave precise timing of TLE onset and features relative to the driving lightning processes below. A total of 76 TLEs were captured on high speed video during this campaign; 10 were halos or elves without sprites, and 66 were sprites, many of which were also accompanied by halos and elves. Sprites were imaged between 5000 and 10000 frames per second on 13 August 2005 during a storm that was as close as 250 km from the camera. The combination of proximity and camera speed revealed a detailed view of the spatial and temporal development of the sprites observed on this night. Some new features were also seen; for example, it appears that at least some sprite beads with persistent optical emissions form when a downward streamer head collides with an adjacent, preexisting streamer channel. On 4 July 2005, numerous sprites were imaged at 3600 and 4800 frames per second above a mesoscale convective system. Many of these sprites were part of complex TLE sequences that reflect the complexity of the underlying lightning flash as observed with the magnetic sensors. The specific relationship between various lightning and sprite processes is discussed.

Affiliated with

Also associated with

No associations

Rating

Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Submillisecond Video and Electromagnetic Observations of Sprite Development and Structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-751667