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Volume 26 Issue 4

Jul.  2009

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2009 >  26(4): 621-629

Drought Reconstruction in the Qilian Mountains over the Last Two Centuries and Its Implications for Large-Scale Moisture Patterns

  • 1.

    Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Cyrosphere and Environmment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000},Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000


doi: 10.1007/s00376-009-9028-0

  • We present a composite tree-ring chronology from two sites of Qilian Juniper (Sabina przewalskii) in the northwestern Qilian Mountains (QM), Northwestern China. Precipitation in June was found to be the main limiting factor for tree-growth. The tree rings are also significantly and positively correlated with June precipitation over large areas of the northern Tibetan Plateau (TP). The authors thus consider that the tree-ring based drought reconstruction from 1803--2006 is representative of a large area drought history. During the reconstruction period, persistent and severe dry epochs occurred in the 1820s--1830s, 1870s--1880s, 1920s, and 1950s--1960s, and persistent wet periods were found from 1803--1810s, 1890s--1920s, and 1970s--1980s. The severe dry and wet periods are similar to those found over the northeastern TP, indicating the potential linkages of the drought regimes between them. Comparison with global SST indicates that the drought variability is closely related to the tropical Pacific and Arctic Ocean SSTs, suggesting the connection of regional moisture variations to the Asian monsoon and westerly belt circulations, respectively.
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    • Manuscript History

    Manuscript received: 10 July 2009
    Manuscript revised: 10 July 2009
    通讯作者: 陈斌, bchen63@163.com
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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    Drought Reconstruction in the Qilian Mountains over the Last Two Centuries and Its Implications for Large-Scale Moisture Patterns

    • 1. Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Cyrosphere and Environmment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000},Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000,Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000
    • Manuscript received: 2009-07-10
    • Manuscript revised: 2009-07-10

    Abstract: We present a composite tree-ring chronology from two sites of Qilian Juniper (Sabina przewalskii) in the northwestern Qilian Mountains (QM), Northwestern China. Precipitation in June was found to be the main limiting factor for tree-growth. The tree rings are also significantly and positively correlated with June precipitation over large areas of the northern Tibetan Plateau (TP). The authors thus consider that the tree-ring based drought reconstruction from 1803--2006 is representative of a large area drought history. During the reconstruction period, persistent and severe dry epochs occurred in the 1820s--1830s, 1870s--1880s, 1920s, and 1950s--1960s, and persistent wet periods were found from 1803--1810s, 1890s--1920s, and 1970s--1980s. The severe dry and wet periods are similar to those found over the northeastern TP, indicating the potential linkages of the drought regimes between them. Comparison with global SST indicates that the drought variability is closely related to the tropical Pacific and Arctic Ocean SSTs, suggesting the connection of regional moisture variations to the Asian monsoon and westerly belt circulations, respectively.

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