Multifractal analysis of snowfall recorded using a 2D-video-disdrometer

Multifractal analysis of snowfall recorded using a 2D-video-disdrometer AbstractUniversal 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 hour-long periods of snowfall, half in calm and half in light wind conditions, were selected for analysis. UManalysis was performed on reconstructed 35-m vertical columns of snowfall structure, snowfall timeseries 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 m and 4.4 m, and sometimes down to about 0.5 m. At smaller scales, no scaling was observed. In high-resolution timeseries of snowfall, evidence of scaling was found for scales between about 7 minutes and ~26 seconds 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 timeseries. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Hydrometeorology American Meteorological Society

Multifractal analysis of snowfall recorded using a 2D-video-disdrometer

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1525-7541
D.O.I.
10.1175/JHM-D-16-0224.1
Publisher site
See Article on Publisher Site

Abstract

AbstractUniversal 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 hour-long periods of snowfall, half in calm and half in light wind conditions, were selected for analysis. UManalysis was performed on reconstructed 35-m vertical columns of snowfall structure, snowfall timeseries 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 m and 4.4 m, and sometimes down to about 0.5 m. At smaller scales, no scaling was observed. In high-resolution timeseries of snowfall, evidence of scaling was found for scales between about 7 minutes and ~26 seconds 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 timeseries.

Journal

Journal of HydrometeorologyAmerican Meteorological Society

Published: Jul 20, 2017

References

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