Distribution patterns of <sup>210</sup>Po, <sup>210</sup>Pb and the particle export in the Taiwan Strait during the winter

Lihao Zhang; Weifeng Yang; Min Chen; Yinian Zhu; Zhou Wang; Ziming Fang; Yusheng Qiu; Yanhong Li

doi:10.1007/s13131-020-1550-z

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Lihao Zhang, Weifeng Yang, Min Chen, Yinian Zhu, Zhou Wang, Ziming Fang, Yusheng Qiu, Yanhong Li. Distribution patterns of 210Po, 210Pb and the particle export in the Taiwan Strait during the winter[J]. Acta Oceanologica Sinica, 2020, 39(2): 12-21. doi: 10.1007/s13131-020-1550-z

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Lihao Zhang, Weifeng Yang, Min Chen, Yinian Zhu, Zhou Wang, Ziming Fang, Yusheng Qiu, Yanhong Li. Distribution patterns of ²¹⁰Po, ²¹⁰Pb and the particle export in the Taiwan Strait during the winter[J]. Acta Oceanologica Sinica, 2020, 39(2): 12-21. doi: 10.1007/s13131-020-1550-z

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Distribution patterns of ²¹⁰Po, ²¹⁰Pb and the particle export in the Taiwan Strait during the winter

doi: 10.1007/s13131-020-1550-z

1.
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
2.
State Key Laboratory of Marine Environmental Science/College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China

Funds: The National Natural Science Foundation of China under contract Nos 41076043 and 51608142; the Guangxi Young and Middle-aged Teachers’ Basic Ability Upgrading Project under contract No. 2019KY0298; the Guangxi Science and Technology Planning Project under contract No. GuiKe-AD18126018.

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Corresponding author: E-mail: wyang@xmu.edu.cn; zhuyinian@glut.edu.cn
Received Date: 2018-11-05
Accepted Date: 2019-02-19

Available Online: 2020-04-21

Publish Date: 2020-02-25

Abstract

Abstract

²¹⁰Po and ²¹⁰Pb are increasingly used to constrain particle dynamics in the open oceans, however they are less used in coastal waters. Here, distributions and partitions of ²¹⁰Po and ²¹⁰Pb were examined in the Taiwan Strait, as well as their application to quantify particle sinking. Activity concentrations of dissolved ²¹⁰Po and ²¹⁰Pb (<0.6 μm) ranged from 1.21 to 7.63 dpm/(100 L) and from 1.07 to 6.33 dpm/(100 L), respectively. Activity concentrations of particulate ²¹⁰Po and ²¹⁰Pb varied from 1.96 to 36.74 dpm/(100 L) and from 3.11 to 38.06 dpm/(100 L). Overall, particulate ²¹⁰Po and ²¹⁰Pb accounted for the majority of the bulk ²¹⁰Po and ²¹⁰Pb. ²¹⁰Po either in dissolved or particulate phases showed similar spatial patterns to ²¹⁰Pb, indicating similar mechanisms for controlling the distributions of ²¹⁰Po and ²¹⁰Pb in the Taiwan Strait. The different fractionation coefficients indicated that particles in the Zhemin Coastal Current (ZCC) inclined to absorb ²¹⁰Po prior to ²¹⁰Pb while they showed an opposite effect in the Taiwan Warm Current (TWC). Based on the disequilibria between ²¹⁰Po and ²¹⁰Pb, the sinking fluxes of total particulate matter (TPM) were estimated to range from –0.22 to 3.84 g/(m²·d), showing an overall comparable spatial distribution to previous reported sediment accumulation rates. However, our sinking fluxes were lower than the sedimentation rates, indicating a sediment resuspension in winter and horizontal transport of particulate matter from the Taiwan Strait to the East China Sea.
- Taiwan Strait,
- ²¹⁰Po,
- ²¹⁰Pb,
- resuspension,
- export flux,
- sedimentation

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References(32)

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