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引用本文:汪勇,沈吉,吴健,刘兴起,张恩楼,刘恩峰.湖泊沉积物14C年龄硬水效应校正初探——以青海湖为例.湖泊科学,2007,19(5):504-508. DOI:10.18307/2007.0502
WANG Yong,SHEN Ji,WU Jian,LIU Xingqi,ZHANG Enlou,LIU Enfeng.Hard-water effect correction of lacustrine sediment ages using the relationship between 14C levels in lake waters and in the atomosphere: the case of Lake Qinghai. J. Lake Sci.2007,19(5):504-508. DOI:10.18307/2007.0502
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湖泊沉积物14C年龄硬水效应校正初探——以青海湖为例
汪勇1,2, 沈吉1, 吴健1,2, 刘兴起1, 张恩楼1, 刘恩峰1
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.中国科学院研究生院, 北京 100049
摘要:
在深入探讨湖泊硬水效应成因和变化规律的基础上, 借鉴海洋碳库效应校正方法, 首次利用湖水和大气14C放射性比度之间关系的方法对青海湖沉积物14C年龄进行硬水效应校正, 并重建了青海湖硬水效应在过去8ka中的变化过程。笔者认为, 青海湖表层沉积物有机质14C年龄不老于1549 aBP, 青海湖硬水效应在7000-1000aBP期间是逐渐增强的。
关键词:  硬水效应  14C年龄校正  湖泊沉积物  青海湖
DOI:10.18307/2007.0502
分类号:
基金项目:国家自然科学基金(40331003);国家杰出青年基金(40625007)联合资助
Hard-water effect correction of lacustrine sediment ages using the relationship between 14C levels in lake waters and in the atomosphere: the case of Lake Qinghai
WANG Yong1,2, SHEN Ji1, WU Jian1,2, LIU Xingqi1, ZHANG Enlou1, LIU Enfeng1
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate School, Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
On the basis of analyzing the nature and feature of hard-water effect, the hard-water effect calibration of sediment 14C ages of Lake Qinghai is carried out using the relationship between 14C levels in lake waters and the atmosphere , in the light of marine reservoir correction. The variation of the hard water effect in Lake Qinghai back to 8000 aBP is also reconstructed. It’s concluded that 14C ages of the surface sediment in Lake Qinghai is less than 1549 aBP and the hard-water effect of Lake Qinghai increased evidently during 7000-1000aBP.
Key words:  Hard-water effect  14C age correction  lacustrine sediment  Lake Qinghai
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