| 千百年尺度气候快速变化及其数值模拟研究进展 |
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| 引用本文： | 靳立亚,陈发虎.千百年尺度气候快速变化及其数值模拟研究进展[J].地球科学进展,2007,22(10):1054-1065. |
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| 作者姓名： | 靳立亚 陈发虎 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室,中德干旱环境联合研究中心,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金人才项目-创新研究群体项目
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教育部高等学校学科创新引智计划(111计划)项目 |
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| 摘 要： | 千百年尺度全球气候快速变化是古气候研究中的一个重要内容。研究发现，末次冰期和全新世都存在着千年、百年尺度的快速气候变化，其变化幅度可以达到典型的地质变化或天文因子所造成的冰期/间冰期的气候振荡幅度，同时这些古气候事件具有全球性。对冰期和全新世气候变化的数值模拟揭示了气候系统对地球轨道参数变化的响应以及海洋、植被、冰盖、温室气体等反馈因子的重要性,其中大洋温盐环流对北大西洋淡水注入的敏感性与末次冰期和全新世气候快速变化密切相联。利用中等复杂程度的气候模式（EMIC）CLIMBER 2模拟了末次冰期典型时段（60~20 ka BP）D/O和Heinrich事件以及东亚气候的响应过程。模拟研究揭示了全新世青藏高原冰雪环境对亚洲—非洲季风气候的显著影响。今后的古气候模拟研究将在改进模式分辨率、结合古气候代用资料确定更加符合历史时期边界条件以进一步改善气候模式的基础上,更加注重气候突变机制的研究以及加强全球变化背景下的区域气候的长期变化研究。
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| 关 键 词： | 快速气候变化 古气候数值模拟 气候变化机制 |
| 文章编号： | 1001-8166（2007）10-1054-12 |
| 收稿时间： | 2007-08-15 |
| 修稿时间： | 2007-08-15 |
Progress in Rapid Climate Changes and Their Modeling Study in Millennial-and Centennial Scales |
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| JIN Li-ya,CHEN Fa-hu.Progress in Rapid Climate Changes and Their Modeling Study in Millennial-and Centennial Scales[J].Advance in Earth Sciences,2007,22(10):1054-1065. |
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| Authors: | JIN Li-ya CHEN Fa-hu |
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| Institution: | Key laboratory of Western China's Environmental Systems, Center for Arid Environment and Paleoclimate Research, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Rapid climate changes at millennial and centennial scales are one of the most important aspects in Paleoclimate study. It has been found that rapid climate changes at millennial and centennial scales are a global phenomenon during both the glacial age and the Holocene with amplitudes typical for geological or astronomical time scales. Simulations of glacial and Holocene climate changes have demonstrated the response of climate system to the Earth orbital forcing and the importance of variations in feedbacks of ocean, vegetation cover, continental ice sheets and greenhouse gases. Modeling experiments suggest that the Atlantic thermohaline circulation was sensitive to the freshwater inputting into the North Atlantic and was closely related to the rapid climate changes during the last glacial age and the Holocene. By using the Earth system models of intermediate complexity (EMICs), CLIMBER 2, the response of East Asian climate change to Dansgaard/Oeschger and Heinrich events during the typical Last Glacial period（60 20kyrBP）and impacts of snow and glaciers over the Tibetan Plateau on Holocene climate change were studied. Further progress of paleoclimate modeling depends on developing finer grid models and reconstructing more reliable boundary conditions.
More attentions should be paid to the study of mechanisms of abrupt climate changes as well as regional climate changes on the basis of global climate change. |
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| Keywords: | Rapid climate change Paleoclimate modeling Mechanism of climate change |
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