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by Ribaud, J-F., Bousquet, O. and Coquillat, S.
Abstract:
The structure of a bow echo system that crossed southeast France on 24 September 2012 during the first Special Observation Period of the Hydrological cycle in the Mediterranean Experiment (HyMeX) is investigated from three-dimensional lightning mapping array, operational lightning network, and operational polarimetric radar observations. Lightning observations reveal that 97% of flash initiation and 93% of flash propagation occurred within the convective region. Through combining LMA and radar-derived microphysical data it is also shown that lightning initiation events and propagation mostly occurred in regions containing graupel (initiation = 70 %, propagation = 58 %), ice (initiation = 22 %, propagation = 33 %), and to a lesser extent hail (initiation = 6 %, propagation = 5 %). The detailed analysis of the lightning activity during two periods of contrasted electrical activity suggests that wet hail growth processes and/or charge redistribution within the cloud may have had a negative impact on lightning initiation occurrences and propagation. The most active periods in terms of lightning activity occurred in conjunction with a vigorous, terrain driven, updraft that transported graupel particles above a height of 12 km.
Reference:
Ribaud, J-F., Bousquet, O. and Coquillat, S., 2016: Relationships between total lightning activity, microphysics, and kinematics during the 24 September 2012 HyMeX bow echo systemQuarterly Journal of the Royal Meteorological Society, 142, 298-309.
Bibtex Entry:
@Article{Ribaud2016b,
  Title                    = {Relationships between total lightning activity, microphysics, and kinematics during the 24 September 2012 HyMeX bow echo system},
  Author                   = {Ribaud, J-F. and Bousquet, O. and Coquillat, S.},
  Journal                  = {Quarterly Journal of the Royal Meteorological Society},
  Year                     = {2016},

  Month                    = {August},
  Number                   = {S1},
  Pages                    = {298-309},
  Volume                   = {142},

  Abstract                 = {The structure of a bow echo system that crossed southeast France on 24 September 2012 during the first Special Observation Period of the Hydrological cycle in the Mediterranean Experiment (HyMeX) is investigated from three-dimensional lightning mapping array, operational lightning network, and operational polarimetric radar observations. Lightning observations reveal that 97% of flash initiation and 93% of flash propagation occurred within the convective region. Through combining LMA and radar-derived microphysical data it is also shown that lightning initiation events and propagation mostly occurred in regions containing graupel (initiation = 70 %, propagation = 58 %), ice (initiation = 22 %, propagation = 33 %), and to a lesser extent hail (initiation = 6 %, propagation = 5 %). The detailed analysis of the lightning activity during two periods of contrasted electrical activity suggests that wet hail growth processes and/or charge redistribution within the cloud may have had a negative impact on lightning initiation occurrences and propagation. The most active periods in terms of lightning activity occurred in conjunction with a vigorous, terrain driven, updraft that transported graupel particles above a height of 12 km.},
  Copublication            = {3: 3 Fr},
  Doi                      = {10.1002/qj.2756},
  ISSN                     = {1477-870X},
  Keywords                 = {dual-polarimetric radar; 3D lightning imager; bow-echo;},
  Owner                    = {hymexw},
  Publisher                = {John Wiley \& Sons, Ltd},
  Timestamp                = {2016.08.26},
  Url                      = {http://dx.doi.org/10.1002/qj.2756}
}