Multifractal properties of daily rainfall in two different climates

Summary, in English

The multifractal properties of daily rainfall were investigated in two contrasting climates: an east Asian monsoon climate (China) with an extreme rainfall variability and a temperate climate (Sweden) with a moderate rainfall variability. First, daily time series were studied. The results showed that daily rainfall in both climates can be viewed as the result of a multiplicative cascade process for the range 1-32 days. The temporal data exhibited scaling for moments of orders up to 2.5 in the monsoon area and up to 4.0 in the temperate area and showed clear multifractal properties in both climates. Second, daily spatial rainfall distributions were pooled into different rainfall-generating mechanism groups, and each group was analyzed separately. The spatial data for all rainfall mechanisms in the two climates exhibited scaling for moments of orders up to 4.0. The scaling regime was 15-180 km (225-32,400 km²) in the monsoon climate and 7.5-90 km 55-8100 km²) in the temperate climate A multifractal framework seemed well suited for description of convective-type rainfall in both climates, but its suitability for frontal rainfall in the two regions was less clear. Although the frontal rainfall exhibited scaling, the almost linear τ(q) functions suggested monufractality.

• Author: C. Svensson; J. Olsson; R. Berndtsson
• Department/s: Division of Water Resources Engineering
• Publishing year: 1996-08
• Language: English
• Pages: 2463-2472
• Publication/Series: Water Resources Research
• Volume: 32
• Issue: 8
• Links: http://dx.doi.org/10.1029/96WR01099
• Document type: Journal article
• Publisher: American Geophysical Union (AGU)
• Topic: Meteorology and Atmospheric Sciences
• Status: Published
• ISBN/ISSN/Other: ISSN: 0043-1397