Quantitative Representation of Spatial Heterogeneities of Regional Persistent Heavy Precipitation Based on Voronoi Diagrams
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Abstract:
To describe the characteristics quantitatively of the spatial heterogeneities of regional persistent heavy precipitation, a new approach is promoted, which can generate quantitatively the spatial heterogeneities of regional persistent heavy precipitation based on the dynamic operation and computational geometry of the Voronoi\\Delaunay model. The daily precipitation dataset in China from 1959 to 2002 is used to build the time series of regional 5 day (10 day) persistent extreme precipitation events to test the application effectiveness, and this method is applied to analyze the spatial heterogeneities, variations, and climatic trends of annual extreme regional 5 day and (10 day) persistent precipitation. The results indicate that comparing with the traditional quantitative statistic method and Kriging interpolation method, this method can easily handle the spatial heterogeneities of regional persistent heavy precipitation and is applicable in the climate change, climate features, and impact researches, and there is a notable advance trend for the occurring date of annual extreme regional 5 day persistent precipitation from 1959 to 2002.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.