| 新疆昭苏黄土剖面色度变化特征及古气候意义 |
| |
| 引用本文： | 李越,宋友桂,王千锁. 新疆昭苏黄土剖面色度变化特征及古气候意义[J]. 地球环境学报, 2014, 0(2): 67-75 |
| |
| 作者姓名： | 李越 宋友桂 王千锁 |
| |
| 作者单位： | 中国科学院地球环境研究所 黄土与第四纪地质国家重点实验室，西安 710075;中国科学院大学，北京 100049,中国科学院地球环境研究所 黄土与第四纪地质国家重点实验室，西安 710075,南京师范大学 地理科学学院，江苏省环境演变与生态建设重点实验室，南京 210046 |
| |
| 基金项目： | 国家重点基础研究发展规划项目(2013CB955904)；国家自然科学基金项目(41172166)；中国科学院科技创新团队及自主布署项目(ZZBS1301)
|
| |
| 摘 要： | 对受西风影响的伊犁盆地南缘的昭苏波马剖面进行色度指标分析后发现，在黄土堆积期间，亮度L*在很大程度上受控于颜色分量a*、b*，同有机质含量关系密切。在S* 中亮度L*与碳酸钙有较好的相关性，而在L*中相关性极低。红度a*受赤铁矿含量的影响最大，其较好的正相关关系可以很好地反映气候变干的过程。而黄度b*与针铁矿相关性较差，易受到多方面因素的影响，对气候转变的敏感性不高。
|
| 关 键 词： | 昭苏剖面；黄土? 古土壤；色度；气候变化 |
| 收稿时间： | 2014-01-08 |
Chroma characteristics in the Zhaosu loess section and its paleoclimatic significance |
| |
| LI Yue,SONG You-gui and WANG Qian-suo. Chroma characteristics in the Zhaosu loess section and its paleoclimatic significance[J]. Journal of Earth Environment, 2014, 0(2): 67-75 |
| |
| Authors: | LI Yue SONG You-gui WANG Qian-suo |
| |
| Abstract: | Chromatic proxies of loess section at the Zhaosu County in the southern Ili Basin are analyzedin this paper. The findings show that correlation between lightness L*, to a large extent, controlled by colorcomponents, a* and b*, and it is close to organic content. In the interval S0, lightness L* correlates wellwith calcium carbonate, while either none or less relates to that in the interval L1. Redness a* is mainlyaffected by hematite content, namely, a* value increases with the increase of hematite content, suggestingthat it can well indicate the process of drying. But yellows b* has less relation with goethite content, withlower sensitivity to climatic shift due to the effects of several different factors. |
| |
| Keywords: | Zhaosu loess-paleosol sequence soil color environmental evolution |
|
| 点击此处可从《地球环境学报》浏览原始摘要信息 |
|
点击此处可从《地球环境学报》下载免费的PDF全文 |
