| 寻求高分辨率的古环境记录 |
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| 引用本文： | 汪品先,翦知湣.寻求高分辨率的古环境记录[J].第四纪研究,1999,19(1):1-17. |
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| 作者姓名： | 汪品先 翦知湣 |
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| 作者单位： | 同济大学海洋地质开放实验室!上海,200092,同济大学海洋地质开放实验室!上海,200092 |
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| 基金项目： | 国家自然科学基金!49576286 |
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| 摘 要： | 古气候变化突然事件的发现和对未来环境变化的预测,提出了取得高分辨率古环境记录的要求。本文试图对国际以及国内文献作一综述,以介绍晚第四纪环境变迁高分辨率研究的最新进展,并以海洋部分作为重点。综述涉及千年、百年、十年和年际的不同时间尺度,但着重阐述“亚米兰科维奇”气候变化,包括Heinrich和Dansgaard／Oeschger事件。对于放射性碳测年数据换算为日历年进行专门讨论,因为这是为环境事件建立精确年代顺序的先决条件。最后,向我国同行提出三点建议：1)在对地层记录运用高分辨率研究方法时要经过精心选择,避免盲目性,并充分意识到此类研究的特殊要求;2)依靠我国所在区域的特殊自然条件,在高分辨率古环境研究中发展独立的学术思想;3)将高分辨率研究方法推广到前第四纪的沉积序列中去。
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| 关 键 词： | 高分辨率记录 古环境 亚米兰科维奇周期性 放射性碳测年换算 |
| 收稿时间： | 1998-10-25 |
| 修稿时间： | 1998-10-29 |
SEARCHING HIGH-RESOLUTION PALEOENVIRONMENTAL RECORDS: A REVIEW |
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| Wang Pinxian,Jian Zhimin.SEARCHING HIGH-RESOLUTION PALEOENVIRONMENTAL RECORDS: A REVIEW[J].Quaternary Sciences,1999,19(1):1-17. |
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| Authors: | Wang Pinxian Jian Zhimin |
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| Institution: | Ministry of Education Laboratory of Marine Geology,Tongji University, Shanghai 200092 |
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| Abstract: | The discovery of abrupt climate changes in the past and the need for Predictions of environmental changes in the future have raised an urgent request for high-resolution paleoenvironmental records. The present paper tries to review the international, as well as Chinese literature to show recent progress in the high-resolution studies of late Quaternary environmental changes, preferentially in offshore areas. Although the review covers all the millennial, centennial, decadal and interannual time scales, itS emphasis is laid on "sub-Milankovitch " climatic variations including Heinrich events and Dansgaard / Oeschger events. A special discussion is devoted to calibration of radiocarbon datings as a Prerequisite for a precise chronology of environmental events.The paper is concluded with three suggestions to Chinese colleagues: 1) to be selective in application of high-resolution approaches to fossil records and to be aware of the specific requirement for high-resolution studies; 2) to develop our own scientific thoughts in high-resolution Paleoenvironmental studies on the basis of regional specific features; and 3) to apply the high-resolution approaches to pre-Quaternary sedimentary sequences. |
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| Keywords: | high-resolution records paleoenvironment Sub-Milankovitch cyclicity calibration of radiocarbon datings |
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