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首页> 外文期刊>Atmospheric research >Tree-ring δ~(18)O-based July-August relative humidity reconstruction on Mt. Shimen, China, for the last 400 years
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Tree-ring δ~(18)O-based July-August relative humidity reconstruction on Mt. Shimen, China, for the last 400 years

机译：树圈δ〜（18）基于7月至8月的MT上的相对湿度重建。中国石门，过去400年

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摘要

Understanding long-term drought variations in the past can help us to evaluate ongoing and future hydroclimate changes in the arid western Chinese Loess Plateau. The present study generated a new stable oxygen isotope (delta O-18) chronology composed of five individual Pinus tabulaeformis Carr. isotope series from Mt. Shimen, China. Correlation function analysis revealed that the composite tree-ring delta O-18 series responded significantly to July-August relative humidity (RHJA, r = -0.684, n = 47, p .0001). A transfer function was thus designed, and the RHJA in the Mt. Shimen region was reconstructed for the past 397 years. Several famous droughts in Chinese history, such as the Chong Zhen severe drought (1637-1643 CE), Ding Wu extraordinary drought (1876-1878 CE) and 1928-1930 CE severe drought, are captured by our reconstruction. Meanwhile, our reconstructed RHJA compares well with other palaeoclimatic results around the study area. Spatial correlation analysis revealed that the RHJA reconstruction displays large-scale representativeness. The reconstruction is significantly positively correlated with several Asian summer monsoon (ASM) indices, indicating that the reconstructed RHJA reflects the variations in ASM intensity to a large extent. In terms of the local climate change mechanisms, we found that the factors affecting the variations in RHJA in the Mt. Shimen region are complex and involve large-scale oceanic-atmospheric couplings, such as sea surface temperature (SST), El Nino-Southern Oscillation (ENSO) and North Atlantic Oscillation (NAO). Solar activity also certainly has great impacts.
机译：了解过去的长期干旱变化可以帮助我们评估干旱西部中国黄土高原的持续和未来的热情变化。本研究产生了一种新的稳定氧同位素（Delta O-18）由五个单独的Pinus tabulaEformis carr组成的年表。来自Mt的同位素系列中国石门。相关函数分析表明，复合树环δO-18系列响应于7月至8月相对湿度（RHJA，R = -0.684，N = 47，P <.0001）。因此设计了传递函数，并在Mt中的rhja。在过去的397年里重建了雄月地区。中国历史上几个着名的干旱，如崇镇严重干旱（1637-1643 CE），丁武非凡干旱（1876-1878 CE）和1928-1930 CE严重干旱，被我们的重建捕获。同时，我们的重建Rhja与研究区周围的其他古希文效果相比得很舒服。空间相关性分析显示RHJA重建显示大规模的代表性。重建与几个亚洲夏季季风（ASM）指数显着呈正相关，表明重建的RHJA在很大程度上反映了ASM强度的变化。就当地气候变化机制而言，我们发现影响山上rhja变异的因素。雄月地区是复杂的，涉及大型海洋大气联轴器，如海面温度（SST），EL Nino-Southern振荡（ENSO）和北大西洋振荡（NAO）。太阳能活动肯定会产生很大的影响。

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  • 来源
    《Atmospheric research》 |2020年第10期|105024.1-105024.14|共14页
  • 作者

    Liu Yu; Ren Meng; Li Qiang; Song Huiming; Liu Ruoshi;

  • 作者单位

    Chinese Acad Sci Inst Earth Environm State Key Lab Loess & Quaternary Geol 97 Yanxiang Rd Xian 710061 Shaanxi Peoples R China|Chinese Acad Sci Ctr Excellence Quaternary Sci & Global Change Xian 710061 Peoples R China|Qingdao Natl Lab Marine Sci & Technol Qingdao 266237 Peoples R China|Xi An Jiao Tong Univ Sch Human Settlements & Civil Engn Xian 710049 Peoples R China;

    Chinese Acad Sci Inst Earth Environm State Key Lab Loess & Quaternary Geol 97 Yanxiang Rd Xian 710061 Shaanxi Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Earth Environm State Key Lab Loess & Quaternary Geol 97 Yanxiang Rd Xian 710061 Shaanxi Peoples R China;

    Chinese Acad Sci Inst Earth Environm State Key Lab Loess & Quaternary Geol 97 Yanxiang Rd Xian 710061 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ Sch Human Settlements & Civil Engn Xian 710049 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mt. Shimen, China; Tree-ring delta O-18; Relative humidity; Asian summer monsoon; Oceanic-atmospheric couplings;

    机译：公吨。中国石门;树戒指达到O-18;相对湿度;亚洲夏季季风;海洋大气联轴器;

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