摘要
1991年5月,利用澳大利亚转动式采样器在江苏固城湖获得总长6.2m的完整柱状岩芯,以5cm间隔采样,对样品中有机质的稳定碳同位素研究表明,较低的δ13C值指示寒冷的气候环境;较高的δ13℃值指示温暖的气候环境。该研究与岩芯中孢粉、硅藻所反映的气候环境十分吻合,因此湖泊沉积物中有机质的δ13C值具有一定反映气候冷暖波动的意义。
This paper reports use of stable isotopic methods to study the lacustrine sediments collected in Gucheng Lake, Jiangsu Provinee in May, 1991. The paleoclimate can be reconstructed through the study of δ13C values in sedimentary or-ganic materials. It can be concluded that smaller δ13C values indicate colder climate,and that larger values indicate warmer climate. This conclusion is in accordanee with studies diatom and palynology. So the δ13C record of sedimentary organic material is sensitive renection of past climate change.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1996年第4期400-404,共5页
Oceanologia Et Limnologia Sinica
基金
中国科学院湖泊沉积与环境开放实验室资助!910018