摘要
Based on the data of temperature,precipitation,drought index and drought disaster area from 88 meteorological stations in Guangxi during 1961-2009,the variation characteristics of temperature,precipitation and drought and the influence of climate change on drought disaster were analyzed by means of linear trend calculation,phased analysis and correlation analysis. The results showed that both annual and seasonal mean temperature rose in 1961-2009 in Guangxi. Annual precipitation increased slightly,but there was great annual variation and decadal variation,and there were inconsistent changes of precipitation in every season with decrease in spring and autumn and increase in summer and winter. The drought index and drought disaster area in Guangxi showed an increasing tendency,especially in autumn. Since 1980s,the severe drought disasters went up significantly. The temporal distribution of rainfall was uneven,while the increased rainless years were the main cause of intensifying drought,but the climate warming exacerbated the influence of drought.
Based on the data of temperature,precipitation,drought index and drought disaster area from 88 meteorological stations in Guangxi during 1961-2009,the variation characteristics of temperature,precipitation and drought and the influence of climate change on drought disaster were analyzed by means of linear trend calculation,phased analysis and correlation analysis. The results showed that both annual and seasonal mean temperature rose in 1961-2009 in Guangxi. Annual precipitation increased slightly,but there was great annual variation and decadal variation,and there were inconsistent changes of precipitation in every season with decrease in spring and autumn and increase in summer and winter. The drought index and drought disaster area in Guangxi showed an increasing tendency,especially in autumn. Since 1980s,the severe drought disasters went up significantly. The temporal distribution of rainfall was uneven,while the increased rainless years were the main cause of intensifying drought,but the climate warming exacerbated the influence of drought.
基金
Supported by Climate Change Project of China Meteorological Administration(CCSF-09-11)
Guangxi Science Foundation for Youths (0991060)
