Nonstationarity in Intermittent Rainfall: The “Dry Drift”

A particular aspect of the nonstationary nature of intermittent rainfall is investigated. It manifests itself in the fact that the average rain rate varies with the distance to the surrounding dry areas. The authors call this fundamental link between the rainfall intensity and the rainfall occurrenc...

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Bibliographic Details
Published in:Journal of hydrometeorology 2014-06, Vol.15 (3), p.1189-1204
Main Authors: Schleiss, Marc, Chamoun, Sabine, Berne, Alexis
Format: Article
Language:English
Subjects:
Arid zones
Hydrometeorology
Modeling
Precipitation
Radar
Rain
Size distribution
Temporal resolution
Time series
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Summary:A particular aspect of the nonstationary nature of intermittent rainfall is investigated. It manifests itself in the fact that the average rain rate varies with the distance to the surrounding dry areas. The authors call this fundamental link between the rainfall intensity and the rainfall occurrence process the “dry drift.” Using high-resolution radar rain-rate maps and disdrometer data, they show how the dry drift affects the structure and the variability of intermittent rainfall fields. They provide a rigorous geostatistical framework to describe it and propose an extension of the concept to more general quantities like the (rain)drop size distribution.
ISSN:1525-755X
1525-7541
DOI:10.1175/JHM-D-13-095.1