| 冬季台湾海峡210Po和210Pb的分布特征及颗粒物的输出 |
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| 引用本文： | 张立浩,杨伟锋,陈敏,朱义年,王宙,方仔铭,邱雨生,李艳红.冬季台湾海峡210Po和210Pb的分布特征及颗粒物的输出[J].海洋学报(英文版),2020,39(2):12-21. |
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| 作者姓名： | 张立浩 杨伟锋 陈敏 朱义年 王宙 方仔铭 邱雨生 李艳红 |
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| 作者单位： | 桂林理工大学 广西环境污染控制理论与技术重点实验室, 广西 桂林 541004;厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,桂林理工大学 广西环境污染控制理论与技术重点实验室, 广西 桂林 541004,厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,厦门大学 近海海洋环境科学国家重点实验室, 福建 厦门 361005,桂林理工大学 广西环境污染控制理论与技术重点实验室, 广西 桂林 541004 |
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| 基金项目： | 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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| 摘 要： | ~(210) Po and ~(210) Pb are increasingly used to constrain particle dynamics in the open oceans, however they are less used in coastal waters. Here, distributions and partitions of ~(210) Po and ~(210) Pb were examined in the Taiwan Strait, as well as their application to quantify particle sinking. Activity concentrations of dissolved ~(210) Po and ~(210) Pb(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 ~(210) Po and ~(210) Pb varied from 1.96 to 36.74 dpm/(100 L) and from 3.11 to 38.06 dpm/(100 L). Overall,particulate ~(210) Po and ~(210) Pb accounted for the majority of the bulk ~(210) Po and ~(210) Pb. 210 Po either in dissolved or particulate phases showed similar spatial patterns to 210 Pb, indicating similar mechanisms for controlling the distributions of ~(210) Po and ~(210) Pb in the Taiwan Strait. The different fractionation coefficients indicated that particles in the Zhemin Coastal Current(ZCC) inclined to absorb 210 Po prior to 210 Pb while they showed an opposite effect in the Taiwan Warm Current(TWC). Based on the disequilibria between ~(210) Po and ~(210) Pb, 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.
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| 关 键 词： | 台湾海峡 210Po 210Pb 再悬浮 输出通量 沉积 |
| 收稿时间： | 2018/11/5 0:00:00 |
Distribution patterns of 210Po, 210Pb and the particle export in the Taiwan Strait during the winter |
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| Zhang Lihao,Yang Weifeng,Chen Min,Zhu Yinian,Wang Zhou,Fang Ziming,Qiu Yusheng and Li Yanhong.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. |
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| Authors: | Zhang Lihao Yang Weifeng Chen Min Zhu Yinian Wang Zhou Fang Ziming Qiu Yusheng and Li Yanhong |
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| Institution: | 1.Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China2.State Key Laboratory of Marine Environmental Science/College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China |
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| 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. |
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| Keywords: | Taiwan Strait 210Po 210Pb resuspension export flux sedimentation |
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