| 引用本文: | 肖海丰,沈吉,肖霞云.云南鹤庆钻孔揭示的古生产力轨道尺度演化.湖泊科学,2006,18(6):615-620. DOI:10.18307/2006.0609 |
| XIAO Haifeng,SHEN Ji,XIAO Xiayun.The orbital scale evolution of the paleoproductivity reflected by Heqing Core in Yunnan Province. J. Lake Sci.2006,18(6):615-620. DOI:10.18307/2006.0609 |
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| 摘要: |
| 本文在分析鹤庆古湖泊不同演化阶段烧失量指标变化特点的基础上,采用频谱分析、滤波分析方法,探讨了该湖泊古生产力轨道尺度的演化特征.综合分析结果显示:在整个演化过程中,由于北半球夏季太阳辐射与南半球潜热输出相位关系的不同,导致斜率周期一直强于岁差周期;在987-1552 ka阶段,15 ka、10.7 ka和10 ka为较强周期,其中10 ka、10.7 ka周期是与100 ka周期强化有关的半岁差周期;在湖泊古生产力演化中存在与气候变化相一致的中更新世转型. |
| 关键词: 湖泊古生产力 岁差 斜率 鹤庆钻孔 |
| DOI：10.18307/2006.0609 |
| 分类号: |
| 基金项目:国家自然科学重点基金项目(40331003);国家自然科学基金项目(40572109)共同资助 |
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| The orbital scale evolution of the paleoproductivity reflected by Heqing Core in Yunnan Province |
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XIAO Haifeng1,2, SHEN Ji1, XIAO Xiayun1,2
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1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Naning 210008, P. R. China;2.Graduate School, Chinese Academy of Sciences, Beijing 100039, P. R. China
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| Abstract: |
| Based on loss on ignition of different parts of Heqing sedimenl cores, we studied ihe chararterislics of orbital scale evolulion of the lake paleoproduetivily by using Spectral analysis and Filler methods, ll shows thal obliquity cycle is stronger than precession clcle in the 2. 78 Ma, due to differenl phasing relalionship helween suminer insolation in ihe norlhern hemisphere and latent heat export in ihe sou I hern Hemisphere. 15 ka, 10.7 ka and 10 ka are the relatively stronger cycles from 987 ka to 1552 ka, in which 10 ka and 10. 7 ka are semi-preression t v-cles related lo the strengthened 100 ka cycles. Further, ihere is Mid-PIeislocene Revolution coincidenl wilh flimat-itc changes in the evolution of lake paleoproductivity. |
| Key words: Faleoproduclivily of the lake precession obliquity Heqing Core |
