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中国沙漠 ›› 2011, Vol. 31 ›› Issue (4): 1059-1064.

• 天气与气候 • 上一篇    下一篇

树轮指示的柴达木盆地近539 a旱涝变化特征

申红艳1, 李 林1, 董安详2, 汪青春1, 时兴合1   

  1. 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
  • 收稿日期:2010-10-26 修回日期:2010-11-27 出版日期:2011-07-20 发布日期:2011-07-20

Drought and Flood Characteristics in the Past 539 Years in Qaidam Basin according to Instruction of Tree-ring

SHEN Hong-yan1, LI Lin1, DONG An-xiang2, WANG Qing-chun1, SHI Xing-he1   

  1. 1.Qinghai Climate Centre, Xining 810001, China; 2.Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China
  • Received:2010-10-26 Revised:2010-11-27 Online:2011-07-20 Published:2011-07-20

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。

关键词: 降水重建, 旱涝变化, 柴达木盆地

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.

Key words: precipitation reconstruction, flood and drought change, Qaidam Basin

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