Tree ring based streamflow reconstruction for the Upper Yellow River over the past 1234 years

查看全文 作　　者：GOU [1]XiaoHua;DENG [1]Yang;CHEN [1]FaHu;YANG [2]MeiXue;FANG [1]KeYan;GAO [1]LinLin;YANG [1]Tao;ZHANG [1]Fen

机构地区：[1]Key Laboratory of Western China's Environmental Systems (MOE), Lanzhou University, Lanzhou 730000, China;[2]State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Chinese Science Bulletin》索引2010年第55卷第36期,共8页

基　　金：supported by the National Natural Science Foundation of China (40671191);the National Natural Science Foundation of China Innovation Team Project (40721061);the Major Program of the National Natural Science Foundation of China (40890051);the One Hundred Tal-ents Program of Chinese Academy of Sciences (29O827B11);the Pro-gram of Introducing Talents of Discipline to Universities from the Chinese Ministry of Education (B06026) 摘　　要：We established a Juniperus przewalski tree ring width chronology, based on tree ring cores collected from the A’nyêmaqên Mountains. Statistical analysis showed that the chronology was highly correlated with instrumental streamflow records from previous August to current July from the Tangnaihai Station in the upper reaches of the Yellow River, with a correlation coefficient of 0.656. Streamflow for the upper reaches of the Yellow River was reconstructed for the past 1234 years. Low flow periods for the 11-year averaged streamflow reconstruction were definite as lower than mean plus 1 standard deviation, and high flow periods were higher than mean minus 1 standard deviation. Over the past 1234 years, high flows occurred 18 times, and low flows occurred 12 times. The main low flow periods were identified as AD 1140–1156, AD 1295–1309, AD 1473–1500, and AD 1820–1847, and the main high flow periods were identified as AD 846–873, and AD 1375–1400. Extremely low streamflow over the reconstruction period was seen during the late 15th century, coinciding with a widespread drought phenomenon, which took place in the northeastern Tibetan Plateau over the same period. Reconstructed streamflow shows significant low-frequency variability, which is in line with drought variability of neighboring regions, as inferred from tree rings and other proxies. Multi-taper spectral analysis suggests the existence of significant periods of 2–5, 22, 35–38, 55–62, and 114–227 years, particularly significant for cyclic variations of years 159 and 36. 关键词：黄河上游径流量树木年轮干旱现象阿尼玛卿山低流量年轮宽度普氏原羚

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Tree ring based streamflow reconstruction for the Upper Yellow River over the past 1234 years

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