利用10a尺度上的虫旱灾异年频数(L∪D)重建陕西过去450a气候干湿变化初步研究  

Decade-Scale Occurring Frequencies of Insect Plagues and Droughts A Net Way to Reconstruct the Historical Dry/Wet Climate Change-A Case Study in Shaanxi Province

作　　者：李钢[1] 王乃昂[1] 程弘毅[1] 蔺岩[2] 张春慧[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000 [2]兰州商学院财政金融学院,兰州730020

出　　处：《干旱区地理》2004年第2期154-160,共7页Arid Land Geography

基　　金：国家重点基础研究发展规划项目 (0 12 0 0 0 0 4870 1);国家自然科学基金项目 (4 0 0 710 3 1)资助

摘　　要：陕西地区关于历史灾害的文献记录相当丰富 ,利用它们比较完整的统计了陕西过去 4 5 0a(15 0 1～ 195 0A .D .)的虫、旱灾年记录。通过分析比较 ,选取 10a尺度上的历史虫旱灾异年频数 (L∪D)对陕西过去 4 5 0a气候干湿变化做了重建 :阶段Ⅰ :15 0 1～ 15 5 0A .D .,气候偏干 ;阶段Ⅱ :15 5 1～ 16 30A .D .,气候偏湿 ;阶段Ⅲ :16 31～ 1710A .D .,气候偏干 ;阶段Ⅳ :1711～ 180 0A .D .,气候偏湿 ;阶段Ⅴ :180 1～ 195 0A .D .,气候偏干。此外 ,在阶段Ⅴ还有一次明显的短气候震动 ,即出现 182 5～ 184 0A .D .的气候偏湿时段 ,这可能与此前印尼火山爆发有关。重建结果与陕西区内外的冰芯、树轮等代用资料的良好对比表明 :(10a尺度上的 )历史虫旱灾异年频数是研究陕西历史气候干湿变化的一种合理可靠、客观有效的气候重建代用指标。In this paper,the historical documents about the occurrence of insect plagues and droughts in Shaanxi Province of Northwest China in the past 450 years are carefully collected and interpreted. After analyzing and comparing,the decade-scale occurring frequencies of insect plagues and droughts are selected to reconstruct the dry/wet climate change in Shaanxi Province in the past 450 years. The results show that there were 5 periods of the dry/wet climate change in the past 450 years: the first period was 1501～1550 A.D.,and the climate was dry;the second period was 1551～1630 A.D.,and the climate was wet;the third period was 1631～1710 A.D.,and the climate was dry;the fourth period was 1711～1800 A.D.,and the climate was wet;and the fifth period was 1801～1950 A.D.,and the climate was dry. Moreover,there was an obvious short climate fluctuation,i.e.,the wet climate period of 1825～1840 A.D.,which was possibly related to the volcanic eruption in Indonesia. The comparison between reconstructed climatic data and that of ice-cores and tree-rings reveals that the decade-scale occurring frequencies of insect plagues and droughts in the historical times are the rational,reliable,objective and effective substitutive indexes for researching the historical dry/wet climate change in Shaanxi Province.

关 键 词：虫灾 旱灾 异年频数 气候变化 10a尺度 陕西 

分 类 号：P46[天文地球—大气科学及气象学]