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Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
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Mapping the Lateral Development of Lightning Flashes From Orbit.

Michael Peterson1, Scott Rudlosky2, Wiebke Deierling3,4

  • 1Cooperative Institute for Climate and Satellites-Maryland, Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA.

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Summary
This summary is machine-generated.

The Lightning Imaging Sensor (LIS) tracks optical signals to map lightning flash development, revealing speeds and directions of electrical leaders within storms. This data helps understand lightning

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Area of Science:

  • Atmospheric Science
  • Geophysics
  • Remote Sensing

Background:

  • Lightning Imaging Sensor (LIS) provides optical measurements of lightning flashes from orbit.
  • Understanding lightning's lateral development is crucial for cloud electrification studies.

Purpose of the Study:

  • To analyze the frame-by-frame evolution of optical signals from LIS data.
  • To map the lateral development, motion, and structure of lightning flashes.
  • To characterize the physical processes driving lightning propagation.

Main Methods:

  • Utilizing optical lightning measurements from the LIS.
  • Monitoring frame-by-frame (group-level) evolution of optical signals during lightning flashes.
  • Analyzing flash properties such as speed, direction, and branching patterns.

Main Results:

  • LIS flashes exhibit complex lateral structures extending up to 80 km with numerous branches.
  • Sixty-five percent of propagating groups move outbound from the origin.
  • Lightning flashes commonly orient east-to-west, developing at speeds of 10^4 to 10^6 m/s.

Conclusions:

  • LIS group-level data reveals detailed lateral flash development and motion.
  • Observed speeds and orientations align with large-scale leader development theories.
  • Lightning imagers can complement ground-based systems for global lightning phenomenon documentation.