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| 1 | 南海与厦门湾海水中^(210)Po和^(210)Pb的粒级分布显示文摘对南海和厦门湾表层水中210Po和210Pb的粒级分布特征进行了研究.结果表明,南海海水中210Po和210Pb在不同粒级颗粒物中的体积比活度高低顺序为:(<0.4μm)>(0.4~2.0μm)>(2.0~10μm)>(>10μm).210Po2、10Pb主要存在于<2.0μm粒级颗粒物中.厦门湾210Po体积比活度高低顺序为:(2.0~10μm)>(<1.2μm)>(>10μm)>(1.2~2.0μm),210Po主要存在于>2.0μm粒级颗粒物中.南海不同粒级颗粒物中210Pb的质量比活度差异不大,0.4~2.0μm和2.0~10μm粒级210Po质量比活度约为10μm粒级210Po比活度的3倍.厦门湾210Po的质量比活度比南海相应粒级210Po低约1个数量级,且各粒级间差异不大,表明不同粒径颗粒物在210Po和210Pb清除过程中的作用不同.210Po和210Pb的固-液分配系数(Kd)及分馏因子(α)进一步证实南海0.4~2.0μm粒级颗粒物对210Po的清除能力比其它粒级颗粒物更强,而>10μm粒级颗粒物对210Pb的清除能力比其它粒级颗粒物更强.不同粒级颗粒物中210Po与210Pb之间的不平衡状况揭示了不同粒级颗粒物不同的来源,为210Po/210Pb不平衡示踪颗粒物来源提供了依据. | 杨伟锋 黄奕普 陈敏 | 2008 | 台湾海峡2008，27，1： | 2 |
| 2 | 厦门近岸^(210)Po和^(210)Pb的大气沉降通量显示文摘为揭示中国东南沿海地区^(210)Po和^(210)Pb的大气沉降时空变化特征,探讨该地区气溶胶的停留时间,于2013年1月至2014年12月对厦门地区^(210)Po和^(210)Pb的大气沉降通量进行了时间序列研究。结果发现,^(210)Po和^(210)Pb的平均日沉降通量分别为(65.38±4.79)mBq/(m^2·d)(n=54)和(0.78±0.09)Bq/(m^2·d)(n=54),表现出明显的周年变化。东北季风期间,^(210)Po和^(210)Pb的沉降通量较高,而西南季风期间其通量较低。2013年和2014年,^(210)Po的年沉降通量分别为19.29 Bq/(m^2·a)和9.25 Bq/(m^2·a),^(210)Pb的年沉降通量分别为159.2 Bq/(m^2·a)和189.6 Bq/(m^2·a)。两核素的年沉降通量表现出不同程度的年际差异。^(210)Po与^(210)Pb沉降通量之间存在显著的线性正相关关系,揭示了大气中^(210)Po和^(210)Pb具有相同的迁出机制,降雨和大气中核素含量是影响^(210)Po和^(210)Pb沉降通量的主要因素。该研究结果可以为探求台湾海峡海水中^(210)Po与^(210)Pb的收支平衡提供大气来源项。 | 张立浩 杨伟锋 陈敏 朱义年 王宙 | 2019 | 海洋学报2019，41，6： | 2 |
| 3 | Seasonal export fluxes of size-fractionated particulate derived from polonium-210: A case study in Xiamen Bay显示文摘Size-fractionated 210Po and 210Pb, in the size fractions >0.4 μm, >2 μm and >10 μm, were examined to determine the seasonal variability of particulate fluxes in Xiamen Bay. Good correlations between 210Po and particulate organic carbon (POC) or non-Particulate Organic Matter (nPOM) suggested that 210Po can be used to trace the export fluxes of POC and nPOM. Both steady-state (SS) model and nSS model were used to evaluate fluxes of size-fractionated 210Po, results showed that nSS model was better than the SS model in coastal areas. Based on the nSS model, size-fractionated POC fluxes decreased with increasing particle size. For the particle size studied, maximum POC fluxes occurred in autumn, followed by spring, winter, and summer. Fluxes of nPOM were an order of magnitude higher than the corresponding size-fractionated POC fluxes. Differences between size-fractionated nPOM fluxes indicated that hydrodynamic conditions were the main factor regulating transportation of particulate out of the inner Bay. In winter most particulates, including >10 μm particles, were transported under the strongest hydrodynamic conditions. In contrast, only a fraction of the <2 μm particulates were transported from the inner Bay in spring. This study suggested that 210Po is a powerful tracer of seasonal particulate export in coastal seas. | 杨伟锋 黄奕普 陈敏 邱雨生 | 2010 | Chinese Journal of Oceanology and Limnology2010，28，2： | 0 |
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