Home About HyMeX
Motivations
Science questions
Observation strategy
Modelling strategy
Target areas
Key documents
Organisation
International coordination
Working groups
Task teams
National contributions
Endorsements
Resources
Database
Data policy
Publications
Education and summer schools
Drifting balloons (BAMED)
SOP web page
Google maps data visualisation
Workshops Projects
ASICS-MED
MOBICLIMEX
MUSIC
IODA-MED
REMEMBER
FLOODSCALE
EXAEDRE
Offers Links Contacts
Science & Task teams
Science teams
Task teams
Implementation plan
Coordination
International Scientific Steering Committee (ISSC)
Executive Committee for Implementation and Science Coordination (EC-ISC)
Executive Committee - France (EC-Fr)
HyMeX France
HyMeX Italy
HyMeX Spain
Archive
by Gires, A., Tchiguirinskaia, I., Schertzer, D. and Berne, A.
Abstract:
Data collected during four heavy rainfall events that occurred in Ardèche (France) with the help of a 2D video disdrometer (2DVD) are used to investigate the structure of the raindrop distribution in both space and time. A first type of analysis is based on the reconstruction of 36-m-height vertical rainfall columns above the measuring device. This reconstruction is obtained with the help of a ballistic hypothesis applied to 1-ms time step series. The corresponding snapshots are analyzed with the help of universal multifractals. For comparison, a similar analysis is performed on the time series with 1-ms time steps, as well as on time series of accumulation maps of N consecutive recorded drops (therefore with variable time steps). It turns out that the drop distribution exhibits a good scaling behavior in the range 0.5–36 m during the heaviest portion of the events, confirming the lack of empirical evidence of the widely used homogenous assumption for drop distribution. For smaller scales, drop positions seem to be homogeneously distributed. The notion of multifractal singularity is well illustrated by the very high-resolution time series.
Reference:
Gires, A., Tchiguirinskaia, I., Schertzer, D. and Berne, A., 2015: 2DVD data revisited: multifractal insights into cuts of the spatiotemporal rainfall processJournal of Hydrometeorology, 16, 548-562.
Bibtex Entry:
@Article{Gires2015,
  Title                    = {2DVD data revisited: multifractal insights into cuts of the spatiotemporal rainfall process},
  Author                   = {Gires, A. and Tchiguirinskaia, I. and Schertzer, D. and Berne, A.},
  Journal                  = {Journal of Hydrometeorology},
  Year                     = {2015},

  Month                    = {April},
  Number                   = {2},
  Pages                    = {548-562},
  Volume                   = {16},

  Abstract                 = {Data collected during four heavy rainfall events that occurred in Ardèche (France) with the help of a 2D video disdrometer (2DVD) are used to investigate the structure of the raindrop distribution in both space and time. A first type of analysis is based on the reconstruction of 36-m-height vertical rainfall columns above the measuring device. This reconstruction is obtained with the help of a ballistic hypothesis applied to 1-ms time step series. The corresponding snapshots are analyzed with the help of universal multifractals. For comparison, a similar analysis is performed on the time series with 1-ms time steps, as well as on time series of accumulation maps of N consecutive recorded drops (therefore with variable time steps). It turns out that the drop distribution exhibits a good scaling behavior in the range 0.5–36 m during the heaviest portion of the events, confirming the lack of empirical evidence of the widely used homogenous assumption for drop distribution. For smaller scales, drop positions seem to be homogeneously distributed. The notion of multifractal singularity is well illustrated by the very high-resolution time series.},
  Copublication            = {4: 3 Fr, 1 Sw},
  Doi                      = {10.1175/JHM-D-14-0127.1},
  Owner                    = {hymexw},
  Timestamp                = {2016.01.08},
  Url                      = {http://journals.ametsoc.org/doi/abs/10.1175/JHM-D-14-0127.1}
}