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by Flaounas, E., Lagouvardos, K., Kotroni, V., Claud, C., Delanoe, J., Flamant, C., Madonna, E. and Wernli, H.
Abstract:
Two deep cyclones occurred in the Mediterranean between 25 and 31 October 2012, during the first Special Observation Period (SOP1) of the Hydrological cycle in the Mediterranean Experiment (HyMeX). Both cyclones were associated with extreme rainfall covering a large part of the western Mediterranean Sea, where 24 h accumulated precipitation measurements exceeded 150 mm. We combine complementary observations from airborne radar and lidar systems, ZEUS lightning detection network and meteorological surface stations along with satellite diagnostics on deep convection, for a detailed microphysics and (thermo-)dynamical analysis of the two extreme rainfall cases. In addition, we use operational analysis data from the European Centre for Medium-range Weather Forecasts (ECMWF) for analysing the synoptic conditions and diagnosing strongly ascending air masses in the vicinity of the cyclones, so-called warm conveyor belts (WCBs). The analysis revealed the different physical characteristics of the two cyclones responsible for the extreme rainfalls. Both cyclones were associated with a WCB and a comma cloud, but deep convection, intense lightning and very cold cloud tops occurred only for the first case while the second cyclone was mostly associated with stratiform rainfall, a strong WCB, and only a few embedded cells of deep convection.
Reference:
Flaounas, E., Lagouvardos, K., Kotroni, V., Claud, C., Delanoe, J., Flamant, C., Madonna, E. and Wernli, H., 2016: Processes leading to heavy precipitation associated with two Mediterranean cyclones observed during the HyMeX SOP1Quarterly Journal of the Royal Meteorological Society, 142, 275-286.
Bibtex Entry:
@Article{Flaounas2016,
  Title                    = {Processes leading to heavy precipitation associated with two Mediterranean cyclones observed during the HyMeX SOP1},
  Author                   = {Flaounas, E. and Lagouvardos, K. and Kotroni, V. and Claud, C. and Delanoe, J. and Flamant, C. and Madonna, E. and Wernli, H.},
  Journal                  = {Quarterly Journal of the Royal Meteorological Society},
  Year                     = {2016},

  Month                    = {August},
  Number                   = {S1},
  Pages                    = {275-286},
  Volume                   = {142},

  Abstract                 = {Two deep cyclones occurred in the Mediterranean between 25 and 31 October 2012, during the first Special Observation Period (SOP1) of the Hydrological cycle in the Mediterranean Experiment (HyMeX). Both cyclones were associated with extreme rainfall covering a large part of the western Mediterranean Sea, where 24 h accumulated precipitation measurements exceeded 150 mm. We combine complementary observations from airborne radar and lidar systems, ZEUS lightning detection network and meteorological surface stations along with satellite diagnostics on deep convection, for a detailed microphysics and (thermo-)dynamical analysis of the two extreme rainfall cases. In addition, we use operational analysis data from the European Centre for Medium-range Weather Forecasts (ECMWF) for analysing the synoptic conditions and diagnosing strongly ascending air masses in the vicinity of the cyclones, so-called warm conveyor belts (WCBs). The analysis revealed the different physical characteristics of the two cyclones responsible for the extreme rainfalls. Both cyclones were associated with a WCB and a comma cloud, but deep convection, intense lightning and very cold cloud tops occurred only for the first case while the second cyclone was mostly associated with stratiform rainfall, a strong WCB, and only a few embedded cells of deep convection.},
  Copublication            = {8: 3 Gr, 3 Fr, 2 Sw},
  Doi                      = {10.1002/qj.2618},
  ISSN                     = {1477-870X},
  Keywords                 = {Heavy rainfall, Mediterranean cyclones, Warm Conveyor Belts, Deep convection: Lightnings, microphysics},
  Owner                    = {hymexw},
  Publisher                = {John Wiley \& Sons, Ltd},
  Timestamp                = {2016.08.26},
  Url                      = {http://dx.doi.org/10.1002/qj.2618}
}