| 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 |
| DOI：10.7515/JEE201402003 |
| CSTR：32259.14.JEE201402003 |
| 分类号:P532 |
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)
|
| 英文基金项目: |
|
| Chroma characteristics in the Zhaosu loess section and its paleoclimatic significance |
|
LI Yue1,2, SONG You-gui1, WANG Qian-suo3
|
|
1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,
Xi′an 710075, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Key Laboratory of
Environmental Evolution and Ecological Construct of Jiangsu Province, College of Geography Science, Nanjing Normal
University, Nanjing 210046, China
|
| Abstract: |
| Chromatic proxies of loess section at the Zhaosu County in the southern Ili Basin are analyzed
in this paper. The findings show that correlation between lightness L*, to a large extent, controlled by color
components, a* and b*, and it is close to organic content. In the interval S0, lightness L* correlates well
with calcium carbonate, while either none or less relates to that in the interval L1. Redness a* is mainly
affected by hematite content, namely, a* value increases with the increase of hematite content, suggesting
that it can well indicate the process of drying. But yellows b* has less relation with goethite content, with
lower sensitivity to climatic shift due to the effects of several different factors. |
| Key words: Zhaosu loess-paleosol sequence soil color environmental evolution |
