摘要
以陕西杨凌 1 932年～ 2 0 0 0年降水序列为代表 ,对关中西部地区降水量的变化趋势进行了分析研究。结果表明 ,杨凌 69a年平均降水量为 5 78.9mm,最大达 979.7mm( 1 95 8年 ) ,最小仅 2 63.5 mm( 1 997年 )。 1 932年～ 1 95 8年和 1 95 9年～ 2 0 0 0年年降水量的气候倾向率分别为 89.9mm/1 0 a和 - 5 3.4mm/1 0 a。降水序列中存在突变现象 ,1 976年是突变点 ,突变点后的平均年降水量比突变点之前减少了 2 1 .6%。针对 2 0世纪后期降水量减少的趋势 ,植树种草改善生态环境和采取各种节水措施是关中西部地区工农业生产持续发展的首要问题。
Taking Yangling's annual precipitation series from 1932 to 2000 as an example, the climate change in western Guanzhong and its evolution tendency were analysed. The result showed that the mean annual precipitation was 578.9 mm at Yangling from 1932 to 2000, its maximum and minimum value were 979.7 mm(1958) and 263.5 mm(1997) respectively. The climatic trend rate of annual precipitation was arising at 89.9 mm/10 year from 1932 to 1958, and it was descepting at 53.4 mm/10 year from 1959 to 2000. The annual precipitation series has a phenomenon of climatic jump in 1976, the mean annual precipitation after 1976 decreased 21.6% compared with before 1976. The water saving technology and cultivated grass and tree planting should be popularized for sustainable development of industry and agriculture.
出处
《干旱地区农业研究》
CSCD
北大核心
2001年第4期110-114,共5页
Agricultural Research in the Arid Areas
基金
国家"九五"重点科技攻关项目 ( 96-0 0 4 -0 4 -0 7)资助
关键词
降水序列
气候倾向率
气候突变
关中西部地区
precipitation series
climatic trend rate
climatic jump
western Guanzhong
