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Climatic and environmental changes over the last millennium recorded in the Malan ice core from the northern Tibetan Plateau
基金项目:国家自然科学基金;国家重点基础研究发展计划(973计划)
摘    要:In this paper, climatic and environmental changes were reconstructed since 1129A.D. based on the Malan ice core from Hol Xil, the northern Tibetan Plateau. The record of δ 18O in the Malan ice core indicated that the warm-season air temperature variations displayed a general increase trend, the 20th-century warming was within the range of natural climate variability, and the warmest century was the 17th century while the warmest decade was the 1610s, over the entire study period. The “Medieval Warm Epoch” and “Little Ice Age” were also reflected by the ice core record. The dust ratio in the Malan ice core is a good proxy for dust event frequency. The 870-year record of the dust ratio showed that dust events occurred much frequently in the 19th century. Comparing the variations of δ 18O and the dust ratio, it is found that there was a strong negative correlation between them on the time scales of 101―102 years. By analyses of all the climatic records of ice cores and tree rings from the northern Tibetan Plateau, it was revealed that dust events were more frequent in the cold and dry periods than in the warm and wet periods.

收稿时间:6 August 2005
修稿时间:18 January 2006

Climatic and environmental changes over the last millennium recorded in the Malan ice core from the northern Tibetan Plateau
Authors:WANG Ninglian  YAO Tandong  PU Jianchen  ZHANG Yongliang  SUN Weizhen
Affiliation:1. Key Laboratory of Cryosphere and Environment,Cold and Arid Regions Environmental and Engineering Research Institute.Chinese Academy of Sciences,Lanzhou 730000,China;Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China
2. Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China;Key Laboratory of Cryosphere and Environment,Cold and Arid Regions Environmental and Engineering Research Institute.Chinese Academy of Sciences,Lanzhou 730000,China
3. Key Laboratory of Cryosphere and Environment,Cold and Arid Regions Environmental and Engineering Research Institute.Chinese Academy of Sciences,Lanzhou 730000,China
Abstract:In this paper, climatic and environmental changes were reconstructed since 1129A.D. based on the Malan ice core from Hol Xil, the northern Tibetan Plateau. The record of δ 18O in the Malan ice core indicated that the warm-season air temperature variations displayed a general increase trend, the 20th-century warming was within the range of natural climate variability, and the warmest century was the 17th century while the warmest decade was the 1610s, over the entire study period. The “Medieval Warm Epoch” and “Little Ice Age” were also reflected by the ice core record. The dust ratio in the Malan ice core is a good proxy for dust event frequency. The 870-year record of the dust ratio showed that dust events occurred much frequently in the 19th century. Comparing the variations of δ 18O and the dust ratio, it is found that there was a strong negative correlation between them on the time scales of 101–102 years. By analyses of all the climatic records of ice cores and tree rings from the northern Tibetan Plateau, it was revealed that dust events were more frequent in the cold and dry periods than in the warm and wet periods.
Keywords:the Tibetan Plateau  the Malan ice core  climate changes  dust event frequency  
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