坝上高原近90年以来降水变化趋势

摘要/Abstract

摘要： 根据史料和降水量资料,建立了自1900年以来坝上高原旱涝级别(5级)序列,并对其进行了周期分析和趋势分析。结果表明,坝上高原降水变化具有明显的42年和9年周期,自60年代初以来该区进入干旱少雨阶段,并将持续到本世纪末下世纪初。此外,还有一些短周期,如4-5年和2-3年等,因而,在今后10年内,干旱和少雨仍将持续,土地沙漠化也将继续发展。

关键词: 坝上高原, 降水变化, 周期与趋势

Abstract: Based on historical documents and precipitation data the sequence of drought-waterlogging class from 1900 onwards in the Bashang highland was established;the periodicity and the variation tendency of precipitation were analysed.The analytcal results showed that the precipitation in Bashang highland has an obvious 42-year and 9-year periedicities.Since 1960s the region has entered into the rain-deficient poriod and this will continue to the beginning of next century.In addition,there were also some short periedicities,e.g.2-3-year and 4-5-year periodicities.Therefore,in the next 10 years the area will continue to experience drought and rain-deficient climate and the desertification will continue to develop.

Key words: Precipitation variation, Drought Bashang, highland

哈斯. 坝上高原近90年以来降水变化趋势[J]. 中国沙漠, 1994, 14(4): 47-52.

Hasi. THE TENDENCY OF PRECIPITATION VARIATION IN THE PAST MINE DECADES IN BASHANG HIGHLAND[J]. JOURNAL OF DESERT RESEARCH, 1994, 14(4): 47-52.

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坝上高原近90年以来降水变化趋势

THE TENDENCY OF PRECIPITATION VARIATION IN THE PAST MINE DECADES IN BASHANG HIGHLAND

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