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| Variations in dust event frequency over the past century reflected by ice-core and lacustrine records in north China | |
| 作者姓名： | WANG NingLian YAO TanDong YANG XiangDong SHEN Ji & WANG Yong Key Laboratory of Cryosphere and Environment Cold and Arid Regions Environmental and Engineering Research Institute Chi- nese Academy of Sciences Lanzhou China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing China Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing China |
| 作者单位： | WANG NingLian1，2，YAO TanDong2，1，YANG XiangDong3，SHEN Ji3 & WANG Yong3 1 Key Laboratory of Cryosphere and Environment，Cold and Arid Regions Environmental and Engineering Research Institute，Chi- nese Academy of Sciences，Lanzhou 730000，China; 2 Institute of Tibetan Plateau Research，Chinese Academy of Sciences，Beijing 100085，China; 3 Nanjing Institute of Geography and Limnology，Chinese Academy of Sciences，Nanjing 210008，China |
| 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, we analyzed the variations of dust proxies in the Dunde, Malan and Chongce ice cores from the northern Tibetan Plateau and the Hongjiannao lacustrine sediment core from north Shaanxi Province, and found that they all showed a general decrease trend over the past century. Owing to the fact that all these ice cores and lacustrine core were retrieved from the margins and/or the leeward sides of the major areas of dust events in north China, their records could suggest that the dust event frequency in north China declined over the study period. This decrease trend might be attributed to increasing precipitation and weakening westerly. However, human activities have made the areal extent of desertification expand acceleratingly in north China. This status could make it possible that dust events would occur on a large spatial scale under the future climate change, which would be a big environmental issue we shall face. |
| 收稿时间： | 11 April 2006 |
| 修稿时间： | 13 November 2006 |
Variations in dust event frequency over the past century reflected by ice-core and lacustrine records in north China |
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| WANG NingLian,,YAO TanDong,,YANG XiangDong,SHEN Ji & WANG Yong Key Laboratory of Cryosphere and Environment,Cold and Arid Regions Environmental and Engineering Research Institute,Chi- nese Academy of Sciences,Lanzhou ,China, Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing ,China, Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing ,China.Variations in dust event frequency over the past century reflected by ice-core and lacustrine records in north China[J].Science in China(Earth Sciences),2007,50(5):736-744. | |
| Authors: | Wang NingLian Yao TanDong Yang XiangDong Shen Ji Wang Yong |
| Institution: | 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. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China |
| Abstract: | In this paper, we analyzed the variations of dust proxies in the Dunde, Malan and Chongce ice cores from the northern Tibetan Plateau and the Hongjiannao lacustrine sediment core from north Shaanxi Province, and found that they all showed a general decrease trend over the past century. Owing to the fact that all these ice cores and lacustrine core were retrieved from the margins and/or the leeward sides of the major areas of dust events in north China, their records could suggest that the dust event frequency in north China declined over the study period. This decrease trend might be attributed to increasing precipitation and weakening westerly. However, human activities have made the areal extent of desertification expand acceleratingly in north China. This status could make it possible that dust events would occur on a large spatial scale under the future climate change, which would be a big environmental issue we shall face. |
| Keywords: | north China dust event frequency climate change |
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