Tsabaris C, Zervakis V, Kaberi H, Delfanti R, Georgopoulos D, Lampropoulou M, Kalfas C A
Hellenic Centre for Marine Research, Institute of Oceanography, Anavyssos, Greece.
University of the Aegean, Department of Marine Sciences, Mytilene, Greece.
J Environ Radioact. 2014 Jun;132:47-56. doi: 10.1016/j.jenvrad.2014.01.015. Epub 2014 Feb 15.
Large volume seawater samples were collected for the determination of (137)Cs concentration along with depth in the deep basins of North and Central Aegean Sea. The vertical (137)Cs distribution showed maximum concentration at the bottom of the basins, while the minimum values corresponded to the intermediate layer, where Levantine water exists. The surface (137)Cs activity is found to lie between the two limits and is originated from the Black Sea waters. The typical oceanographic advection-diffusion balance model is modified to a diffusion-settling-decay balance model to better understand the vertical distribution and variation of the (137)Cs concentration in the deep basins. In addition, the diffusivity of each basin, as well as the settling speed of particulate (137)Cs is also estimated. The results are compared with theoretical approach as well as with previous data.
采集了大量海水样本，用于测定爱琴海北部和中部深海盆地中（137）铯浓度随深度的变化。垂直方向上（137）铯的分布显示，盆地底部浓度最高，而最低值对应于存在黎凡特海水的中间层。发现表层（137）铯活度介于两个极限值之间，其来源是黑海海水。对典型的海洋平流 - 扩散平衡模型进行修改，得到扩散 - 沉降 - 衰变平衡模型，以便更好地理解深海盆地中（137）铯浓度的垂直分布和变化。此外，还估算了每个盆地的扩散率以及颗粒态（137）铯的沉降速度。将结果与理论方法以及先前的数据进行了比较。
