Wei Ching-Ling, Chia Chao-Yuan, Chou Wen-Chen, Lee Wen-Huei
Institute of Oceanography, National Taiwan University, PO Box 23-13, Taipei 106, Taiwan.
Institute of Oceanography, National Taiwan University, PO Box 23-13, Taipei 106, Taiwan.
J Environ Radioact. 2017 Aug;174:45-53. doi: 10.1016/j.jenvrad.2016.05.026. Epub 2016 Jun 7.
Vertical fluxes of total mass (F), particulate organic carbon (F), particulate inorganic carbon (F), Pb (F), and Po (F) were determined by sediment traps deployed at two depths, 2000 m and 3500 m, at SEATS (South East Asian Time-series Study, 116°00°E, 18°00°N) in the northern South China Sea during June 2008-June 2009. The F ranges from 12.2 to 55.1 mg m d and from 89.3 to 250.8 mg m d, at 2000 m and 3500 m, respectively, and shows seasonal and inter-annul variation. The temporal variation of F, F, and F were in phase with the F, which was coupled with the seasonal cycles of primary production in the euphotic layer. The F ranges from 5 to 48 dpm md and from 38 to 105 dpm md, at 2000 m and 3500 m, respectively. Contrasting with Pb, the F shows poor correlation with F. The F ranges from 3 to 146 dpm md and from 50 to 309 dpm md, at 2000 m and 3500 m, respectively. Episodic events of the settling of biological particles from the surface layer and the regeneration processes the deep layer control the Po removal in the water column of the South China Sea. Strong correlations of the flux and source ratio of Pb, (F/P), and the particulate carbon fluxes were found, which give relationships of F (μg cmy) = 26.8 + 371.0 (F/P) and F (μg cmy) = -1.4 + 533.1 (F/P).
2008年6月至2009年6月期间，在中国南海北部的SEATS（东南亚时间序列研究，东经116°00′，北纬18°00′），通过部署在2000米和3500米两个深度的沉积物捕获器，测定了总质量（F）、颗粒有机碳（F）、颗粒无机碳（F）、铅（F）和钋（F）的垂直通量。在2000米和3500米处，F分别在12.2至55.1毫克·米⁻²·天⁻¹和89.3至250.8毫克·米⁻²·天⁻¹之间，呈现出季节性和年际变化。F、F和F的时间变化与F同步，这与真光层初级生产的季节性周期相关。在2000米和3500米处，F分别在5至48衰变率·米⁻²·天⁻¹和38至105衰变率·米⁻²·天⁻¹之间。与铅不同，F与F的相关性较差。在2000米和3500米处，F分别在3至146衰变率·米⁻²·天⁻¹和50至309衰变率·米⁻²·天⁻¹之间。表层生物颗粒沉降的偶发事件和深层的再生过程控制着南海水柱中钋的去除。发现铅的通量与源比（F/P）和颗粒碳通量之间存在强相关性，其关系为F（微克·厘米⁻²·年⁻¹） = 26.8 + 371.0（F/P）和F（微克·厘米⁻²·年⁻¹） = -1.4 + 533.1（F/P）。
