%0 Journal Article
%T APPLICATION OF STABLE CARBON ISOTOPE FOR PALEOENVIRONMENTAL RESEARCH<br>稳定碳同位素在第四纪古环境研究中的应用
%A 王国安
%J 第四纪研究
%D 2003
%I 
%X Paleobiogeo chemistry has been breaking a new path for paleoenvironmental research. Carbon is one of basic elements in organism, and stable carbon isotope has been widely applied in paleoenvironmental research. This paper summarizes accomplishment of application for paleoenvironmental reconstruction from stable carbon isotope in terrestrial sediments, lacustrine sediments, tree rings and vertebrate tooth enamel, and puts forward some new ideas: 1) Because of the difference between environmental condition under which loess deposits and that under which paleosol forms, the fractionation factor of CO 2 calcite in loess is different from that in paleosol; We thinks that it is the different fractionation factor that makes carbon isotopic composition of organic matter to show an opposite varying trend to that of coexisting carbonate in sequence of loess paleosol; 2) Organic matter in terrestrial sediments is a direct product of decomposition of vegetation, so, carbon isotopic composition of organic matter more directly effects change of vegetation than that of carbonate does. In order to availably apply carbon isotope of carbonate for paleoenvironmental research, the mechanism of carbon isotope in carbonate should be further studied; 3) C 4 plants in the Loess Plateau in China would have been at a greater disadvantage over C 3 plants under the climate of the last glacial, and this disadvantage is mainly attributed to enough large decreasing of temperature in the last glacial. This paper emphasizes that the relationship between carbon isotope of standing plants and climate, and between distribution of standing C 4 plants and climate should be further studied in order to apply carbon isotope for paleoenvironmental research. Stable carbon isotope of molecular--a new means will even push paleoenvironmental research.
%K stable carbon isotope
%K paleoenvironmental research<br>稳定碳同位素
%K 古环境研究
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=EA07051745CDC8D89D5F01A3A4CFE6A9&aid=1E7A3AB3DF1EB453&yid=D43C4A19B2EE3C0A&vid=EA389574707BDED3&iid=94C357A881DFC066&sid=DCE57F652E4ADAFC&eid=D8B37A0210DB6B9D&journal_id=1001-7410&journal_name=第四纪研究&referenced_num=28&reference_num=82