| 树轮指示的柴达木盆地近539 a旱涝变化特征 |
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| 引用本文： | 申红艳,李林,董安详,汪青春,时兴合.树轮指示的柴达木盆地近539 a旱涝变化特征[J].中国沙漠,2011,30(4):1059-1064. |
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| 作者姓名： | 申红艳 李林 董安详 汪青春 时兴合 |
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| 作者单位： | 1. 青海省气候中心,青海西宁,810001
2. 中国气象局兰州干旱气象研究所,甘肃兰州,730020 |
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| 基金项目： | 科技支撑项目(2007BAC29B04); 公益性行业(气象)科研专项(GYHY201106013-5-5)共同资助 |
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| 摘 要： | 利用柴达木盆地东北缘的圆柏树轮资料,重建了柴达木盆地1470—2001年5—9月的降水量,并依照《中国近五百年旱涝分布图集》的旱涝等级标准恢复了历史旱涝变化。分析发现,柴达木盆地旱远多于涝,也是极端干旱事件高发区; 旱涝变化具有阶段性,539 a的旱涝序列可分为3个旱阶段和3个涝阶段,以旱为主的时期长于以涝为主的时期; 涝年平均21 a一遇,旱年平均3 a一遇; 干旱发生的显著周期为2.8 a,特旱为9.2 a。
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| 关 键 词： | 降水重建 旱涝变化 柴达木盆地 |
| 收稿时间： | 2010-10-26 |
| 修稿时间： | 2010-11-27 |
Drought and Flood Characteristics in the Past 539 Years in Qaidam Basin according to Instruction of Tree-ring |
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| SHEN Hong-yan,LI Lin,DONG An-xiang,WANG Qing-chun,SHI Xing-he.Drought and Flood Characteristics in the Past 539 Years in Qaidam Basin according to Instruction of Tree-ring[J].Journal of Desert Research,2011,30(4):1059-1064. |
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| Authors: | SHEN Hong-yan LI Lin DONG An-xiang WANG Qing-chun SHI Xing-he |
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| Institution: | SHEN Hong-yan1,LI Lin1,DONG An-xiang2,WANG Qing-chun1,SHI Xing-he1(1.Qinghai Climate Centre,Xining 810001,China,2.Institute of Arid Meteorology,China Meteorological Administration,Lanzhou 730020,China) |
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| Abstract: | Precipitation from May to September during 1470—2001 in the Qaidam Basin was reconstructed by means of the tree-ring data of Juniper in northeastern margin of the Qaidam Basin. The drought and flood change history was retrieved according to the standards from “Atlas with Yearly Charts of Drought/Flood in China for the Last 500 Years". The results showed that drought was more than flood and there was a high incidence of extreme drought events in the Qaidam Basin. The drought-flood change of 539 years can be divided into three drought stages and three flood stages, and drought period was longer than the flood period. There was a flood year every 21 years and a drought year every 3 years. The significant periods of the drought year and the extreme drought year was 2.8-year and 9.2-year. |
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| Keywords: | precipitation reconstruction flood and drought change Qaidam Basin |
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