EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Analysis of Blue Discharges in Thunderclouds

Krystallia Dimitriadou1, Olivier Chanrion1, Torsten Neubert1, Matthias Heumesser1, Alain Protat2, Valentin Louf3, Hugh Christian4, Richard Blakeslee5, Chris Köhn1, Nikolai Østgaard6, and Victor Reglero7
Krystallia Dimitriadou et al.
  • 1Technical University of Denmark, DTU Space, National Space Institute, Kgs. Lyngby, Denmark
  • 2Australian Bureau of Meteorology, Science and Innovation Group, Radar Science and Nowcasting Team, Melbourne, Australia
  • 3Monash University, School of Earth, Environment and Atmosphere, Melbourne, Australia
  • 4Earth System Science Center, University of Alabama in Huntsville, Alabama, USA
  • 5NASA Marshall Space Flight Center, Alabama, USA
  • 6University of Bergen, Birkeland Centre for Space Science, Bergen, Norway
  • 7University of Valencia, Image Processing Laboratory, Valencia, Spain

The Modular Multispectral Imaging Array (MMIA) of the Atmosphere-Space Interactions Monitor (ASIM) contains 3 photometers and 2 cameras, that monitors electrical discharges in and above thunderstorms. The 3 photometers sample in the bands:  337/4 nm, the VUV band 180-230 nm and 777.4/5 nm at 100 kHz; and the 2 cameras record in the bands 337/5 nm and 777.4/3 nm, with a temporal resolution of 12 frames per second. The 337 nm band corresponds to the strongest line of N22P, the VUV band include part of the N2 LBH and the 777.4 nm band corresponds to the OI line which is the strongest emission line of lightning leader channel. Here, we analyse observations of flashes that are predominantly blue. We will discuss the leader/streamer nature of these flashes. The analysis incorporates satellite cloud observations and weather radar measurements for the characterization of the thunderstorm clouds and their phase of development. In our optical analysis we incorporate also comparisons with data from NASA’s Lightning Imaging Sensor on the ISS (ISS-LIS) and VAISALA’s lightning location network GLD360.

How to cite: Dimitriadou, K., Chanrion, O., Neubert, T., Heumesser, M., Protat, A., Louf, V., Christian, H., Blakeslee, R., Köhn, C., Østgaard, N., and Reglero, V.: Analysis of Blue Discharges in Thunderclouds, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18845,, 2020

This abstract will not be presented.