| 察尔汗地区130ka B.P.以来湖相沉积物颜色记录的气候变化探讨 |
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| 引用本文： | 陈宗颜,陈克龙,罗正霞.察尔汗地区130ka B.P.以来湖相沉积物颜色记录的气候变化探讨[J].盐湖研究,2011,19(4):1-7,14. |
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| 作者姓名： | 陈宗颜 陈克龙 罗正霞 |
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| 作者单位： | 青海师范大学生命与地理科学学院,青海西宁,810008 |
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| 摘 要： | 通过柴达木盆地察尔汗地区湖相沉积物的L*、a*和b*值与有关地球化学指标的相关关系分析,对湖相沉积物颜色指标在古气候研究中的意义进行了探讨,并据此分析了130 ka B.P.以来该区的古气候演变过程。结果表明,L*值与沉积物碳酸盐含量正相关,L*值高时,气候冷干,碳酸盐含量较高;反之,气温上升,湿度增加。b*值和a*值与沉积物中Fe、Mg含量相关,高a*值反映气温较高,b*值可用于反映湖水深度变化和有效湿度的变化,b*值高,湖水浅,氧化作用增强。察尔汗地区色度曲线反映的气候变化特征与其他的气候指标曲线相吻合。
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| 关 键 词： | 察尔汗 颜色 湖相沉积物 气候变化 |
Climatic Change Recorded by the Chroma of Lacustrine Sediments from 130 ka B.P.in Qarhan Area |
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| CHEN Zong-yan,CHENKe-long,LOU Zheng-xia.Climatic Change Recorded by the Chroma of Lacustrine Sediments from 130 ka B.P.in Qarhan Area[J].Journal of Salt Lake Research,2011,19(4):1-7,14. |
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| Authors: | CHEN Zong-yan CHENKe-long LOU Zheng-xia |
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| Institution: | CHEN Zong-yan,CHEN Ke-long,LOU Zheng-xia(Biology & Geography College of Qinghai Normal University,Xining,810008,China) |
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| Abstract: | The present paper discusses the meaning of lacustrine sediments chroma to paleoclimate research,then the paleoclimate change since 130 ka B.P.in Qarhan area was analyzed through the correlation ship between L*,a* and b* of lacustrine sediments with other geochemical indexes.The result shows that it is correlation between L* and carbonate,L* is high when the environment is cold,dry and the content of carbonate is high also,while the L* is low when environment is warm and humid.Besides,it is correlation betwe... |
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| Keywords: | Qarhan Chrome Lacustrine sediments Climatic change |
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