Concentrations of total suspended matter ( ctsm ) is unanimous with observational data and other scholars " researching results . the distribution of ctsm is higher along coast than other areas there is a tongue - like zone with high ctsm from north to southeast . the transport simulation result reveals that sm can spread to the okinawa trough for enough sea water mixing in winter . but in summer . sm can not traverse the big water barrier of kushino for different circulation character . this difference is probably related to the shifting n - s monsoon 悬浮体输送表明，在冬季，悬浮体除了在陆架上发生扩散外，由于海水的强烈混合作用和环流的季节性变化，部分中、底层悬浮体可扩散至冲绳海槽甚至西太平洋;在夏季，由于海水层化及夏季环流特征，悬浮体基本不能穿越黑潮这一水障，这一差异可能是由于季风和不同环流特征所引起的。
