Source and sedimentary process of <sup>239+240</sup>Pu in the eastern China seas

Huang Ya’nan

doi:10.12284/hyxb2022123

Volume 44 Issue 11

Nov. 2022

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Huang Ya’nan. Source and sedimentary process of 239+240Pu in the eastern China seas[J]. Haiyang Xuebao，2022, 44(11)：77–87 doi: 10.12284/hyxb2022123

Citation:

Huang Ya’nan. Source and sedimentary process of ^239+240Pu in the eastern China seas[J]. Haiyang Xuebao，2022, 44(11)：77–87 doi: 10.12284/hyxb2022123

Huang Ya’nan. Source and sedimentary process of 239+240Pu in the eastern China seas[J]. Haiyang Xuebao，2022, 44(11)：77–87 doi: 10.12284/hyxb2022123

Citation:

Huang Ya’nan. Source and sedimentary process of ^239+240Pu in the eastern China seas[J]. Haiyang Xuebao，2022, 44(11)：77–87 doi: 10.12284/hyxb2022123

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Source and sedimentary process of ^239+240Pu in the eastern China seas

doi: 10.12284/hyxb2022123

Huang Ya’nan^{1, 2
,}

1.
School of Marine Science, Sun Yat-sen University, Zhuhai 519082, China
2.
Centro Nacional de Aceleradores, Sevilla 41092, Spain

Received Date: 2021-11-19
Rev Recd Date: 2022-05-01

Available Online: 2022-06-23

Publish Date: 2022-11-03

Abstract

Abstract

This study compiled the data of ^239+240Pu specific activity, ²⁴⁰Pu/²³⁹Pu atom ratio and ^239+240Pu flux or inventory in the East China Sea and adjacent waters. Based on the ^239+240Pu concentration in atmospheric fallout, ^239+240Pu in seawater, ^239+240Pu in organisms,^239+240Pu in sediment trap and ^239+240Pu in sediment, the geochemical behavior of ^239+240Pu were explained in the East China Sea and adjacent waters. The results showed that global fallout and Pacific proving grounds close-in fallout were the two major sources of ^239+240Pu. Under the influence of water masses such as the Changjing River diluted water, Zhejiang-Fujian Coastal Current, Taiwan Warm Current, Kuroshio Current and upwelling current, mixing effect and removal effect, the concentration of ^239+240Pu in coastal waters of the East China Sea showed a trend of removal over time, the burial depth of ^239+240Pu in the near shore sediments was deeper than that in the far sea area. In the northeast of Taiwan Island of China, the ^239+240Pu specific activity and ^239+240Pu inventory in Okinawa Trough increased significantly under the influence of Kuroshio current intrusion and upwelling current. At the same time, this study found that the relationship between ^239+240Pu specific activity and ²⁴⁰Pu/²³⁹Pu atom ratio in surface sediments of the East China Sea, and confirmed the existence of a tributary of the Kuroshio bottom in northeastern Taiwan, and indicated the location where the Taiwan Warm Current and a tributary of the Kuroshio bottom may intersect.
- ^239+240Pu,
- ²⁴⁰Pu/²³⁹Pu,
- East China Sea,
- sediment,
- seawater

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References(34)

References

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