| Climate change over southern Qinghai Plateau in the past 500 years recorded in Sabina tibetica tree rings |
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| 作者姓名： | QINNingsheng SHAOXuemei JINLiya WANGQingchun ZHUXide WANGZhenyu |
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| 作者单位： | [1]ClimateDateCenterofQinghai,Xining810001,China [2]InstituteofGeographicSciencesandNatureResourcesResearch,ChineseAcademyofSciences,Beijing100101,China [3]ResourceEnvironmentDepartmentofLanzhouUniversity,Lanzhou730000,China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | Two tree ring-width chronologies of Sabina tibetica were developed based on cores sampled in Qumalal and Zhiduo, southern Qinghai Plateau. The response function analysis showed that the chronologies were sensitive to temperature and precipitation from April to June in the plateau. Moisture index (MI) was defined, reconstructed and extended back to AD 1550. The cross-validation method was used to check the stability of the calibration equation, and the result indicated that the equation was stable. Six severe dry periods were found in this region in the past 453-year reconstruction, which were 1592 to 1610, 1649 to 1665, 1687 to 1697, 1740 to 1750, 1818 to 1829 and 1918 to 1933. Five severe wetting periods were 1669 to 1682, 1700 to 1709, 1800 to 1814, 1898 to 1909 and 1935 to 1950. Spectrum analysis indicated that there existed long-term cycles of 60.4 and 53.4 a, solar cycle of 11 a and short-term cycles of 8, 6 and 4 a in the reconstructed series.
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| 关 键 词： | 青海高原 气候变化 中国 湿度指数 |
Climate change over southern Qinghai Plateau in the past 500 years recorded in Sabina tibetica tree rings |
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| QINNingsheng SHAOXuemei JINLiya WANGQingchun ZHUXide WANGZhenyu.Climate change over southern Qinghai Plateau in the past 500 years recorded in Sabina tibetica tree rings[J].Chinese Science Bulletin,2003,48(22):2483-2487. |
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| Authors: | Qin Ningsheng Shao Xuemei Jin Liya Wang Qingchun ZHU Xide WANG Zhenyu Li Jinbao |
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| Institution: | QIN Ningsheng1, SHAO Xuemei2, JIN Liya3, WANG Qingchun1, ZHU Xide1, WANG Zhenyu1 & LI Jinbao3 1. Climate Date Center of Qinghai, Xining 810001, China; 2. Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 3. Resource Environment Department of Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Two tree ring-width chronologies of Sabina tibetica were developed based on cores sampled in Qumalai and Zhiduo, southern Qinghai Plateau. The response function analysis showed that the chronologies were sensitive to temperature and precipitation from April to June in the plateau. Moisture index (MI) was defined, reconstructed and extended back to AD 1550. The cross-validation method was used to check the stability of the calibration equation, and the result indicated that the equation was stable. Six severe dry periods were found in this region in the past 453-year reconstruction, which were 1592 to 1610, 1649 to 1665, 1687 to 1697, 1740 to 1750, 1818 to 1829 and 1918 to 1933. Five severe wetting periods were 1669 to 1682, 1700 to 1709, 1800 to 1814, 1898 to 1909 and 1935 to 1950. Spectrum analysis indicated that there existed long-term cycles of 60.4 and 53.4 a, solar cycle of 11 a and short-term cycles of 8, 6 and 4 a in the reconstructed series. |
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| Keywords: | southern Qinghai Plateau tree-ring chronology reconstruction moisture index |
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