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首页> 外文期刊>Global and planetary change >A 400-year tree-ring δ~(18)O chronology for the southeastern Tibetan Plateau: Implications for inferring variations of the regional hydroclimate
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A 400-year tree-ring δ~(18)O chronology for the southeastern Tibetan Plateau: Implications for inferring variations of the regional hydroclimate

机译：青藏高原东南部400年树轮的δ〜（18）O年表：推断区域水气候变化的意义

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摘要

We developed a new tree-ring cellulose δ~(18)O chronology for the southeastern Tibetan Plateau from Balfour spruce (Picea likiangensis var. balfouriana [Rehd. et Wils.]) that covered the period from 1600 to 2008, and compared the results with a previous study to explore climatic variations in the Nyingchi-Bomi area. Our tree-ring δ~(18)O chronology correlated significantly with the previous study (Shi et al., 2012; Climate of the Past 8, 205-213) during the common period from 1781 to 2005, and provided new insights into long-term regional hydroclimatic variations. Besides the significant positive correlations between tree-ring δ~(18)O and the temperature and sunshine duration during the growing season, tree-ring δ~(18)O was strongly negatively correlated with regional cloud cover, relative humidity, and precipitation in July and August. The correlations with cloud cover data were stronger than in previous research, but the correlations with precipitation and relative humidity in July and August were weaker. When Indian summer monsoon conditions prevail, regional hydroclimate variations (and especially cloud cover) have the dominant influence on tree-ring δ~(18)O in the study area. Based on the regional data, δ~(18)O in tree rings can be an effective proxy to infer the temporal variations in regional hydroclimatic conditions and the strength of the Indian Summer Monsoon. Our results reveal that the Indian Summer Monsoon weakened from 1600 to 1650, followed by continuous strengthening until 1740 and a slight weakening from 1740 to present. The temporal variations in the cellulose δ~(18)O chronology generally corresponded well to the δ~(18)O and glacier snow accumulation records found in ice cores from the middle Himalaya.
机译：我们为巴尔福云杉（Picea likiangensis var。balfouriana [Rehd。et Wils。]）的青藏高原东南部开发了一种新的年轮纤维素δ〜（18）O年表，并比较了1600年至2008年的时间，并比较了结果与先前的研究一起探讨林芝-波米地区的气候变化。我们的树木年轮δ〜（18）O年代学与先前的研究（Shi等，2012;过去8年的气候，205-213）在1781年至2005年的共同时期显着相关，并为长期研究提供了新的见解区域水文气候变化。除了树木年轮δ〜（18）O与生长期的温度和日照时间之间存在显着的正相关外，树木年轮δ〜（18）O与区域性云量，相对湿度和降水量也呈负相关。七月和八月。与云量数据的相关性强于以前的研究，但与7月和8月的降水和相对湿度的相关性较弱。当印度夏季风条件盛行时，区域性水文气候变化（尤其是云量）对研究区域的树轮δ〜（18）O具有主要影响。根据区域数据，年轮中的δ〜（18）O可以有效地推断区域性水文气候条件的时空变化和印度夏季风的强度。我们的结果表明，印度夏季风从1600到1650减弱，然后持续增强直到1740，从1740到现在略有减弱。纤维素δ〜（18）O时序的时间变化通常与喜马拉雅中部冰芯中发现的δ〜（18）O和冰川积雪记录非常吻合。

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  • 来源
    《Global and planetary change》 |2013年第5期|23-33|共11页
  • 作者

    Xiaohong Liu; Xiaomin Zeng; Steven W. Leavitt; Wenzhi Wang; Wenling An; Guobao Xu; Weizhen Sun; Yu Wang; Dahe Qin; Jiawen Ren;

  • 作者单位

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China,University of Chinese Academy of Sciences, Beijing 100049, China;

    Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721, USA;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China,University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China,University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China,University of Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou 730000, China;

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  • 关键词

    tree-ring δ~(18)O; regional hydroclimate; tibetan plateau; indian summer monsoon;

    机译：树环δ〜（18）O;区域性气候西藏高原印度夏季风;

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