Multifractal Analysis of Snowfall Recorded Using a 2D Video Disdrometer

Abstract : Universal multifractal (UM) analysis was used to investigate the scaling properties of snowfall at high temporal and spatial resolutions. Snowfall data were recorded using a 2D video disdrometer (2DVD) in the Swiss Alps. Six 1-h-long periods of snowfall, half in calm and half in light wind conditions, were selected for analysis. UM analysis was performed on reconstructed 35-m vertical columns of snowfall structure, snowfall time series at 100-ms resolution, and two-dimensional snowflake accumulation maps over a 5.12 5.12 cm2 area. Multifractal scaling was observed for the vertical structure of snow particle number concentration, for scales between about 35 and 4.4 m, and sometimes down to about 0.5 m. At smaller scales, no scaling was observed. In high-resolution time series of snowfall, evidence of scaling was found for scales between about 7 min and ~26 s in most of the analyzed hours. Snowflake accumulations within a subset of the small sampling area of the 2DVD showed no scaling properties, suggesting homogeneous structure in snowfall at the very small (~5 cm) scale, which agrees with the results for vertical structure and time series.
Type de document :
Article dans une revue
Journal of Hydrometeorology, American Meteorological Society, 2017, 18 (9), pp.2453-2468. 〈10.1175/JHM-D-16-0224.1〉
Liste complète des métadonnées

Littérature citée [42 références]  Voir  Masquer  Télécharger

https://hal-enpc.archives-ouvertes.fr/hal-01673434
Contributeur : Auguste Gires <>
Soumis le : mercredi 28 mars 2018 - 10:37:02
Dernière modification le : mercredi 28 mars 2018 - 18:07:32
Document(s) archivé(s) le : mardi 11 septembre 2018 - 08:50:48

Fichier

Raupach_et_al_jhm_2017.pdf
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Collections

Citation

Timothy H. Raupach, Auguste Gires, Ioulia Tchiguirinskaia, D Schertzer, Alexis Berne. Multifractal Analysis of Snowfall Recorded Using a 2D Video Disdrometer. Journal of Hydrometeorology, American Meteorological Society, 2017, 18 (9), pp.2453-2468. 〈10.1175/JHM-D-16-0224.1〉. 〈hal-01673434〉

Partager

Métriques

Consultations de la notice

162

Téléchargements de fichiers

10