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| 吉林柳河哈尼湖13.1～4.5cal.kaB.P.古气候演化的高分辨率孢粉记录 | |
| 引用本文： | 喻春霞,罗运利,孙湘君.吉林柳河哈尼湖13.1～4.5cal.kaB.P.古气候演化的高分辨率孢粉记录[J].第四纪研究,2008,28(5):929-938. |
| 作者姓名： | 喻春霞 罗运利 孙湘君 |
| 作者单位： | 1. 中国科学院植物研究所,系统与进化植物学国家重点实验室,北京,100093;中国科学院研究生院,北京,100049 2. 中国科学院植物研究所,系统与进化植物学国家重点实验室,北京,100093 3. 中国科学院植物研究所,系统与进化植物学国家重点实验室,北京,100093;同济大学海洋地质国家重点实验室,上海,200092 |
| 摘 要： | 利用哈尼湖钻孔剖面深837～304cm高分辨率的123个孢粉数据和序列中的8个14C测年数据重建中国东北地区13.1～4.5cal.kaB.P.的植被与气候历史:13.1～11.9cal.kaB.P.植被变化明显,整个时段气温较低,后期有回暖趋势,在12.8～12.1cal.kaB.P.的快速变干可能是新仙女木事件在本区的体现;11.9～10.0cal.kaB.P.孢粉显示为以云杉、冷杉等针叶树为主,气候湿冷;10.0～8.2cal.kaB.P.针叶林逐步演替为落叶阔叶林,为升温阶段;8.2～4.5cal.kaB.P.落叶阔叶林进一步发展,气候温暖湿润。同时孢粉序列也反映出,东北地区在气候变暖后发生了一系列的冷暖干湿波动,大致可与我国北方和南方其他地区的气候事件对应。经频谱分析表明,本区在研究期间存在1100a,700a,500a及300a的气候变化的准周期。 |
| 关 键 词： | 古气候 孢粉分析 哈尼湖 |
| 收稿时间： | 2008-03-25 |
| 修稿时间： | 2008-06-18 |
A HIGH-RESOLUTION POLLEN RECORDS FROM HA′NI LAKE,JILIN,NORTHEAST CHINA SHOWING CLIMATE CHANGES BETWEEN 13.1cal.kaB.P. and 4.5cal.kaB.P |
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| Yu Chunxia,Luo Yunli,Sun Xiangjun.A HIGH-RESOLUTION POLLEN RECORDS FROM HA′NI LAKE,JILIN,NORTHEAST CHINA SHOWING CLIMATE CHANGES BETWEEN 13.1cal.kaB.P. and 4.5cal.kaB.P[J].Quaternary Sciences,2008,28(5):929-938. | |
| Authors: | Yu Chunxia Luo Yunli Sun Xiangjun |
| Institution: | 1. State Key Laboratory of Systematic &|Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049; 3. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092 |
| Abstract: | 123 high-resolution pollen records obtained from 837cm to 304cm of the Ha'ni Lake core in Jilin Province,Northeast China and 8 accurate AMS 14C dating data provided an opportunity to reconstruct the climatic change responded by vegetation evolution from 13.1cal.kaB.P.to 4.5cal.kaB.P.The evolution can be divided into the following stages:(1)13.1～11.9cal.kaB.P.At the very beginning the pollen percentage of trees which were mainly Betula,Pinus,and Picea was more than 50%,and herbs was 40%.The vegetation was sylvosteppe.The climate was cold and wet.From 12.8cal.kaB.P.to 12.1cal.kaB.P.,herbs expanded rapidly and dominated the area,indicating a dryer climate which may be part of the Younger Dryas event.At the end of this stage there was an appreciable increase of deciduous broad-leaved tree pollen percentages,showing a warming tendency.(2)11.9～10.0cal.kaB.P.A high volume of Picea and Abies pollen reflected that the vegetation changed into coniferous forest.The climate became cold and wet.(3)10.0～8.2cal.kaB.P.The percentage of broad-leaved deciduous trees increased gradually.The coniferous forest was gradually replaced by broad-leaved deciduous forest,which indicated a rapid rise of temperature.(4)8.2～4.5cal.kaB.P.Generally the broad-leaved deciduous tree pollen percentage was high(up to 80%)in this area,which indicated a wide spread of broad-leaved deciduous trees and amoderate and humid climate.However,the broad-leaved deciduous tree pollen percentage also decreased several times along with the increase of herbs and conifers during this period,showing climate fluctuations between cold and warm,dry and wet.There were four times low temperature fluctuations around 6.8cal.kaB.P.,6.1cal.kaB.P.,5.5cal.kaB.P.,and 4.7cal.kaB.P.As to spectrum analysis,there were quasi-periodic climate variations of 1100a,700a,500a,and 300a from 13.1cal.kaB.P.to 4.5cal.kaB.P.in the Ha'ni area. |
| Keywords: | paleo～climate pollen analysis Hani Lake |
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