摘要
在黄土高原选择了１２个现代黄土堆积的典型地点，采集表层及５ｃｍ深度处的黄土样品，提取植物残体作稳定同位素分析。发现：（１）不同深度样品的植物残体δ１３Ｃ值差异明显，可形成高分辨率的时间序列；（２）植物残体的δ１３Ｃ值与气温的对应关系具有分区的特征，子午岭以西的黄土地区为负相关，其余地区比较复杂；（３）植物残体的δ１３Ｃ值与降水的关系不密切。
Authors chosen 12 typical sites of modern loess deposition in the Loess Plateau, taken samples at the surface and the 5cm depth from each site, and extract the vegetation residues for isotope analysis. The analysis result shows that: (1) the δ 13 C values of the samples from different depths vary obviously, it is very suitable for reconstructing the high resolution series; (2) the relationship between δ 13 C and the air temperature differs in different areas. In the west area to the Ziwuling Mountain it is reversed, in the other areas it is complex; (3) there is no definite relationship between δ 13 C and the annual precipitation.
出处
《现代地质》
CAS
CSCD
北大核心
1998年第4期582-585,共4页
Geoscience
基金
国土资源部重点基础项目
国土资源部环境地质开放研究实验室联合资助课题
关键词
黄土高原
植物残体
同位素
气候指标
古气候
the Loess Plateau, vegetation residue, isotope composition, climate indicator
