Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River

Zhongqiao Li; Ying Wu; Liyang Yang; Jinzhou Du; Bing Deng; Jing Zhang

doi:10.1007/s13131-020-1543-y

Volume 39 Issue 4

Apr. 2020

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Zhongqiao Li, Ying Wu, Liyang Yang, Jinzhou Du, Bing Deng, Jing Zhang. 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. doi: 10.1007/s13131-020-1543-y

Citation:

Zhongqiao Li, Ying Wu, Liyang Yang, Jinzhou Du, Bing Deng, Jing Zhang. 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. doi: 10.1007/s13131-020-1543-y

Citation:

Zhongqiao Li, Ying Wu, Liyang Yang, Jinzhou Du, Bing Deng, Jing Zhang. 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. doi: 10.1007/s13131-020-1543-y

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Carbon isotopes and lignin phenols for tracing the floods during the past 70 years in the middle reach of the Changjiang River

doi: 10.1007/s13131-020-1543-y

Zhongqiao Li^{1, 2},
Ying Wu^{1
,
,},
Liyang Yang^{1, 3},
Jinzhou Du¹,
Bing Deng¹,
Jing Zhang¹

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 210012, China
2.
Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
3.
College of Environment and Resources, Fuzhou University, Fuzhou 350108, China

Funds: 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.

More Information

Corresponding author: E-mail: wuying@sklec.ecnu.edu.cn
Received Date: 2019-02-23
Accepted Date: 2019-06-10

Available Online: 2020-12-28

Publish Date: 2020-04-25

Abstract

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 (∆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.
- flood record,
- carbon isotopes,
- lignin phenols,
- Changjiang River,
- Lake Tian E Zhou

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References(28)

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