Analysis on Characteristics of Tropical Cyclone Rainstorms in Huang-Huai-Hai Area from 1961 to 2010
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Abstract:
Based on the daily rainfall data at 61 stations in the Huang-Huai-Hai area from 1961 to 2010 and the data of《Tropical Cyclone Yearbook》, the frequency and intensity of tropical cyclone and tropical cyclone rainstorm were analyzed using the methods of regression analysis and ArcGIS spatial analysis. The results showed that the tropical cyclone in the Huang-Huai-Hai region usually lands intensely in the coastal place of Zhejiang and Fujian in August with the type of northward class path. Overall, the tropical cyclone rainstorm of the Huang-Huai-Hai area accounts for a small proportion of the total storm, but it has high intensity and the average amount of tropical cyclone rainstorm reaches 93.2 mm, which is similar to the heavy rainstorm. The temporal and spatial distribution of the frequency and amount of tropical cyclone rainstorm are both unbalanced. The frequency and intensity of tropical cyclone rainstorm in the Huang-Huai-Hai region increases in recent years, and the east coast and central and western regions?are most likely influenced by tropical cyclone with high frequency and heavy rainstorm. In addition, the frequency of tropical cyclone rainstorm shows a decreasing trend from east to west on the whole, but the distribution of rainstorm quantity is not apparent.
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