simultaneous satellite and radar data
DESCRIPTION
Satellite, radar and lightning data. Simultaneous satellite and radar data The radar images overlaid on satellite images are always interpolated in time (using displacement vector fields) to the satellite ‘European time’ (nominal + 10 minutes). (P. Németh) The parallax effect is not corrected. - PowerPoint PPT PresentationTRANSCRIPT
HRV (70-100%) IR10.8 (Tb<240K)
HRV (70-100%) radar Zmax > 35dBz
HRV cloud (HRV,HRV,IR10.8) radar Zmax > 35dBz
10-minute lightning data (CC+CG)(CC+CG)
Simultaneous satellite and radar data
The radar images overlaid on satellite images are always interpolated in time (using displacement vector fields) to the satellite ‘European time’ (nominal + 10 minutes). (P. Németh)
The parallax effect is not corrected.
CC: cloud to cloud flashes, CG: cloud to ground flashes
Satellite, radar and lightning data
Lightning
In the updraft part of a cell many collisions happen between cloud particles, and the particles may became electrically charged.
The positive and negative charges accumulate in different parts of the clouds.
The generated poles cause discharges: first intra-cloud then cloud-to-ground flashes of lightning.
The highest number of discharges occur in the closed ambience of the overshooting top.
Developing stage -- single cell
The following features characterize the developing of a single cell:
•The developing stage lasts 5 to 10 minutes
•A distinct single updraft is prevailing
•The diameter of the cell is between 2 and 8 km
•At the end of this stage lightning is most intense
Lightning in the upstream part of
Cb/MCS
Lightning activity was extremly high in this MCS, more then 1000 CC (cloud to cloud) flashes were detected per 10 minutes between 6-11UTC.
Between 10:10-10:20UTC almost 8000 CC flashes were detected.
HRV (70-100%)
HRV (70-100%) Radar
Zmax (>35dBz)
IR10.8 (<240K)
HRV cloud Radar Zmax
(>35dBz) 10min
lightning
Parallax shift
Overshooting top
High radar reflectivities close to
overshooting tops
The majority of lightnings are close to overshooting
tops
Cold rings, cold U shape
Overshooting top
Cold rings, cold U shape
Overshooting top
Cold rings, cold U shape
Cold rings, cold U shape
Overshooting top
Plume
Overshooting top
CCCG
Asymmetric bow echo
After this less flashes
Radial Ci
Overshooting top
Bow echo
The number of the flashes decreased at about 11UTC and further decreased after 12UTC.
The system became less active.