Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology

CORC > 地球化学研究所 > 中国科学院地球化学研究所 > 环境地球化学国家重点实验室 > 期刊论文

	Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology
	Shijie Wang; Daojing Li; Hongbing Ji; Xiao Wei
刊名	Environmental Earth Sciences
	2016
卷号	75 期号:13
英文摘要	This paper analyzed stable carbon and oxygen isotopic changes in organic matter (delta C-13(SOM)) and disseminated carbonate (delta C-13(SC) and delta O-18(SC)) in four terra rossa profiles in Gouzhou, southwestern China. The objectives were to understand more information about climate change in this area and to determine whether the isotope values of disseminated carbonate in terra rossa preserved a record of environmental change and to distinguish environmental sources that may have influenced the isotopic chemistry. Results suggested that carbonate in terra rossa is mainly pedogenic carbonate, and its formation is closely associated with root activities. The delta C-13(SOM) variations indicate a climate change into warmer and drier conditions at about 6000-8000 a BP, 12000-14000 a BP and 28000 a BP. Plants were more depleted in delta C-13 when carbonate precipitated. Compared with the delta C-13(SOM), the delta C-13(SC) tends to reflect more average climate change information. Most large variations of the delta C-13(SC) and delta C-13(SOM) between adjacent sampling layers are accompanied with the change in soil color and texture, suggesting a certain connection between the delta C-13 and the soil properties. This study found a positive linearity between delta C-13(SC) and delta O-18(SC); a striking different value and correlation coefficient in different sites may provide a meaningful signal of regional climate change.
学科主题	环境地球化学
语种	英语
公开日期	2017-11-20
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6514]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Shijie Wang,Daojing Li,Hongbing Ji,et al. Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology[J]. Environmental Earth Sciences,2016,75(13).
APA	Shijie Wang,Daojing Li,Hongbing Ji,&Xiao Wei.(2016).Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology.Environmental Earth Sciences,75(13).
MLA	Shijie Wang,et al."Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology".Environmental Earth Sciences 75.13(2016).