首页 | 官方网站   微博 | 高级检索  
     

Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River
作者姓名:李中乔  吴莹  杨丽阳  杜金洲  邓兵  张经
作者单位:华东师范大学, 河口海岸学国家重点实验室, 上海 200062;自然资源部第二海洋研究所, 海洋生态系统动力学重点实验室, 杭州 310012;华东师范大学, 河口海岸学国家重点实验室, 上海 200062;福州大学, 环境与资源学院, 福州 350108
基金项目:The National Natural Science Foundation of China under contract Nos 41021064, 41276081 and 41606211; the 111 Project under contract No. B08022; the Scientific Research Fund of Second Institute of Oceanography, MNR under contract No. JG1806.
摘    要:The Lake Tian E Zhou(TEZ,an oxbow lake)was formed during the rerouting of the Changjiang River in 1972,with strong influences from the main river channel and flood events.Herein,a sediment core was collected from the Lake TEZ for the measurements of carbon isotopes and biomarkers,including stable carbon isotopes(δ13C),radiocarbon composition(?14C),and lignin phenols,as well as lead-210 to reconstruct recent heavy flood events over the past 70 years.At the 24–26 cm interval,the sediment contained the highest OC%,TN%,and lignin phenols content,as well as significantly depleted 13C but enriched 14C,corresponding to the extreme flood event in 1998.In addition,statistics from t-test showed that lignin phenols normalized to OC(Λ8),the concentration of 3,5-dihydroxy benzoic acid(3,5-BD),and the ratio of p-hydroxy benzophenone to total hydroxyl phenols(PHB/HP)were all significantly different between the layers containing flood deposits and the layers deposited under normal non-flood conditions(p<0.05).These results indicate that the later three parameters are highly related to flood events and can be used as compelling proxies,along with sediment chronology,for hydrological changes and storm/flood events in the river basin and coastal marine environments.

关 键 词:flood  record  carbon  isotopes  lignin  phenols  Changjiang  River  Lake  Tian  E  Zhou
收稿时间:2019/2/23 0:00:00

Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River
Li Zhongqiao,Wu Ying,Yang Liyang,Du Jinzhou,Deng Bing,Zhang Jing.Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River[J].Acta Oceanologica Sinica,2020,39(4):33-41.
Authors:Li Zhongqiao  Wu Ying  Yang Liyang  Du Jinzhou  Deng Bing  Zhang Jing
Affiliation:1.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 210012, China2.Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China3.College of Environment and Resources, Fuzhou University, Fuzhou 350108, China
Abstract:The Lake Tian E Zhou (TEZ, an oxbow lake) was formed during the rerouting of the Changjiang River in 1972, with strong influences from the main river channel and flood events. Herein, a sediment core was collected from the Lake TEZ for the measurements of carbon isotopes and biomarkers, including stable carbon isotopes (δ13C), radiocarbon composition (Δ14C), and lignin phenols, as well as lead-210 to reconstruct recent heavy flood events over the past 70 years. At the 24–26 cm interval, the sediment contained the highest OC%, TN%, and lignin phenols content, as well as significantly depleted 13C but enriched 14C, corresponding to the extreme flood event in 1998. In addition, statistics from t-test showed that lignin phenols normalized to OC (Λ8), the concentration of 3, 5-dihydroxy benzoic acid (3, 5-BD), and the ratio of p-hydroxy benzophenone to total hydroxyl phenols (PHB/HP) were all significantly different between the layers containing flood deposits and the layers deposited under normal non-flood conditions (p<0.05). These results indicate that the later three parameters are highly related to flood events and can be used as compelling proxies, along with sediment chronology, for hydrological changes and storm/flood events in the river basin and coastal marine environments.
Keywords:flood record  carbon isotopes  lignin phenols  Changjiang River  Lake Tian E Zhou
本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录!
点击此处可从《海洋学报(英文版)》浏览原始摘要信息
点击此处可从《海洋学报(英文版)》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号