攀枝花市自然降水资源变化特征分析(英文)

Analysis on Variation Characteristics of Natural Precipitation Resources in Panzhihua City

攀枝花地区的自然降水受西南季风水汽和地形再分配作用,时空分布差异明显。利用攀枝花仁和站1965～2009年降水资料,统计分析了攀枝花年降水、汛期降水和各季节降水的气候变化特征。结果表明,20世纪70年代以来春季、夏季、汛期与年降水量的降水变化显著一致,目前呈现为增多趋势; 秋季呈减少趋势。通过年降水的10年滑动平均可以看出,攀枝花市自然降水资源的年际变化有其自身的规律性,当前处于一个缓慢下降的态势。

Affected by southwest monsoon moisture and topography redistribution,natural precipitation in Panzhihua had obvious difference in temporal and spatial distribution.By using precipitation data from Renhe station in Panzhihua during 1965-2009,the variation characteristics of annual precipitation,flood season precipitation and seasonal precipitation were analyzed.The results showed that spring precipitation,summer precipitation,flood season precipitation and annual precipitation changed conformably and significantly since 1970s in 20th century,showing increase trend at present,while autumn precipitation showed decrease tendency.From the 10-year running mean of annual precipitation,it was found that the annual variation of precipitation resources in Panzhihua City had its own regularity,and there was a slowly decrease at present.