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Stable carbon and oxygen isotopes of terra rossa in Guizhou Province of China and their relationship to climate and ecology
Daojing Li; Hongbing Ji; Xiao Wei; Shijie Wang
2016
Source PublicationEnvironmental Earth Sciences
Volume75Issue:13
AbstractThis 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.
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6514
Collection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
Recommended Citation
GB/T 7714
Daojing Li,Hongbing Ji,Xiao Wei,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 Daojing Li,Hongbing Ji,Xiao Wei,&Shijie Wang.(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 Daojing Li,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).
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