Study on Spatio temporal Pattern of Hail Disaster in China Mainland From 1950 to 2009

doi:10.3969/j.issn.1000-6362.2015.01.011

Abstract

Abstract: By widely gathering multisources of hail disaster information on county level of China mainland from 1950 to 2009，the present research established a hail hazard database.For revealing the variation rules of spatio temporal pattern of hail hazard，the hail disaster occurrence time，range and frequency for nearly 60 years were statistical analyzed by using GIS technology.Some significant results were gained.（1）The spatial distribution of hail disaster in China mainland presents the characteristic of one belt and multi centers.The belt from northeast to southwest China is the major hail disaster affect area，and eight hail disaster centers，include the Loess Plateau，Bohai Rim，Northeast Plain，Yunnan Guizhou Plateau，Jianghuai Plain，Aksu Prefecture in Xinjiang，eastern Qinghai and Central China，are the main areas of hail disaster occurs.（2）The hail disasters occurrence have an obvious seasonal change.In the middle and lower reaches of Yangtze River and South China mainland，hail disasters mainly concentrated in the time period from February to April，but from May to September in other regions.The hail belt has a promotion from south to north and then a retreat from north to south，accompany with the month changes from the beginning to the end of the year.（3）Before 1987，the county numbers occur hail disasters showed overall upward trend，then presented a downward trend after 1987.In general，the county numbers occur hail disasters were fairly high from 1970s to 1990s than other periods.

Key words: Hail disaster, Case data, Spatio temporal pattern, GIS technology

ZHAO Jin tao，YUE Yao jie，WANG Jing ai，YIN Yuan yuan，FENG Hong ying. Study on Spatio temporal Pattern of Hail Disaster in China Mainland From 1950 to 2009[J]. Chinese Journal of Agrometeorology, 2015, 36(01): 83-92.

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