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| 中国黄土高原西部马兰黄土记录的MIS3气候特征与全球气候记录的对比研究 | |
| 引用本文： | 陈一萌,饶志国,张家武,陈兴盛.中国黄土高原西部马兰黄土记录的MIS3气候特征与全球气候记录的对比研究[J].第四纪研究,2004,24(3):359-365. |
| 作者姓名： | 陈一萌 饶志国 张家武 陈兴盛 |
| 作者单位： | 兰州大学西部环境教育部重点实验室,兰州,730000;中国科学院寒区旱区环境与工程研究所,兰州,730000;兰州大学西部环境教育部重点实验室,兰州,730000;新疆哈密石油基地地球物理研究所处理室,哈密,839009 |
| 基金项目： | 科学技术部重大国际合作项目 (批准号 :2 0 0 2CB714 0 0 4),国家杰出青年科学基金项目 (批准号 :NSFC40 12 5 0 0 1)资助 |
| 摘 要： | 对黄土高原西部临夏塬堡剖面的研究表明:56.1～25.0kaB.P.相当于末次冰期大间冰阶或深海氧同位素第3阶段可划分为56.1～42.2kaB.P.强温湿、39.3～33.1kaB.P.弱温湿、31～25kaB.P.中等温湿的3个温湿期和42.2～39.3kaB.P.,33.1～31.0kaB.P.的两个干冷期,且没有记录前人认为的所谓“高温大降水事件”。全球不同区域同期气候记录的对比分析证明:“高温大降水事件”只是局部气候演变的产物,其影响范围是有限的,将末次冰期晚期40～30kaB.P.全部升格为间冰期的说法有待商榷。在深海氧同位素第3阶段成因机制的探讨中,究竟是太阳辐射量的变化诱导北半球冰量的变化,从而诱发末次冰期这一温湿时期的产生,还是在较大程度上受太阳辐射量的变化更直接一些,尚需做更多的工作。 |
| 关 键 词： | MIS3特征 对比分析 "高温大降水事件" |
| 文章编号： | 1001-7410(2004)03-359-07 |
| 收稿时间： | 2003-09-15 |
| 修稿时间： | 2003年9月15日 |
COMPARATIVE STUDY OF MIS3 CLIMATIC FEATURES RECORDED IN MALANLOESS IN THE WESTERN PART OF THE LOESS PLATEAU ANDGLOBAL RECORDS |
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| Institution: | 1. Education Ministry Key Laboratory of West China Environment, Lanzhou University, Lanzhou 730000; 2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000; 3. Institute of Geophysics Hami Petroleum Base of Xinjiang, Hami 839009 |
| Abstract: | Studies on the Yuanbao section, Linxia in the western part of the loess plateau show that the period of 56.1～ 25.0kaB.P . corresponding to the megainterstadial of the last glaciation or deep-sea oxygen isotope stage 3 can be divided into three warm-humid intervals and two dry-cold intervals, i.e. 56.1～42.2kaB.P. strong warm-humid interval, 39.3～33.1kaB.P . weak-humid interval, 31.0～25.0kaB.P. moderate warm-humid interval, 42.2～39.3kaB.P. dry-cold interval and 33.1～31.0kaB.P. dry-cold interval, but in excludes professor Shi Yafeng“high-precipitation events". Comparative analyses of contemporaneous heteropic or contemporaneous cophasal climatic records in different regions all over the world demonstrate that the “megathermal high-precipitation events" is only a local climatic change and can only affect limited extent. That the latter part of last glaciation of 40～30kaB.P. is included in the exploration of the origin mechanism of oxygen isotope stage 3, whether solar radiation variation caused ice volume changes in the Northern Hemisphere and thereby caused the occurrence of this warm-humid period of the last glaciation or directly related to the solar radiation changes to a large extent in still hard to determine which one holds a leading place in accordance with preset study level. Therefore, much work is required to clarify this problem. |
| Keywords: | MIS3 feature comparative analysis origin mechanism megathermal high-pricipitation event |
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