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Mar Pollut Bull. 2018 Mar;128:361-368. doi: 10.1016/j.marpolbul.2018.01.047. Epub 2018 Feb 6.

Spatial and vertical distribution of radiocesium in seawater of the East China Sea.

Author information

1
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China.
2
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China. Electronic address: jlwang@sklec.ecnu.edu.cn.
3
Xi'an AMS Center and KLLQG, Institute of Earth Environment, Chinese Academy of Science, Xi'an 710075, China.

Abstract

The 137Cs activity in surface water of the East China Sea (ECS) was 0.66-1.36 Bq m-3 during May of 2011. The low activities were observed in the Changjiang Estuary and Zhejiang-Fujian coast and high activities were observed in the south offshore and Kuroshio Current pathway, suggesting that the influence from the current system in the ECS. The 134Cs were undetectable (<0.03 Bq m-3) and the contribution of the Fukushima accident to ECS is estimated to be below 3%; hence it is negligible during the investigation period. Using the vertical profiles of 137Cs in the ECS, the mass balance is obtained, which suggests that the oceanic input dominates the 137Cs source in the ECS. 137Cs is potentially useful to trace water mass movement in the ECS. Our study provides comprehensive baseline of 137Cs in the ECS for evaluation of the possible influence of the nuclear power plants in the future.

KEYWORDS:

(137)Cs; East China Sea; Seawater; Spatial distribution; Vertical profile

PMID:
29571384
DOI:
10.1016/j.marpolbul.2018.01.047
[Indexed for MEDLINE]

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