Abstract Particle size-spectra of suspended particulate matter(SPM) and U(238U，234U) and Th(234Th，228Th，230Th，232Th) isotopes and their variations with depth，salinity，tide and season were systemically examined in the coastal waters of Xiamen Bay. In addition，the rates constants of aggregation and disaggregation of size-fractionated particle including >10mm，2～10mm，0.4～2mm，0.2～0.4mm...学位：理学博士院系专业：海洋与环境学院海洋系_海洋化学学号：B20012700
