Variations in air temperature during the last 100 years revealed by δ~(18)O in the Malanice core from the Tibetan Plateau |
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作者姓名: | WANGNinglian YAOTandong PUJianchen ZHANGYongliang SUNWeizhen WANGYouqing |
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作者单位: | KeyLaboratoryofIceCoreandColdRegionsEnvironment,ColdandAridRegionsEnvironmentalandEngineeringResearchInstitute,ChineseAcademyofSciences,Lanzhou730000,China |
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基金项目: | 中国科学院知识创新工程项目,科技部重点项目,国家自然科学基金 |
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摘 要: | By comprehensive analyses,it was found that the variations in δ^18O recorded in Malan ice core from the Kekexili Region on the Tibetan Plateau could represent the changes in air temperature during the summer half year (from May to October) over the Kekexili Region and the northern margin of the Tibetan Plateau.The general increase trend in δ^18O in the ice core during the past century indicated climate warming,and it was estimated that air temperature during the summer half-year rose about 1.2℃ over there then.However,this ice core record documented that the study area has been cooling while most of the world has been dramatically warming since the late 1970s. A tele-connection was found between the variations in δ^18O in the Malan ice core and the North Atlantic Oscillation.Moreover,the variations in δ^18O in this ice core were similar to that in the summer half-year air temperature over the southern Tibetan Plateau on the centurial time scale,but opposite on the multidecadal time scale.
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关 键 词: | 空气温度 δ^18O 西藏高原 全球变暖 马伦冰核 北大西洋波动 气候变化 |
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