Many investigations had been done in the eddy clayey area and its ambient area of north East China Sea, but the scale was too small to indicate sedimentary characteristic of this area.

• 尽管历史上对东海北部涡旋区粘土质沉积及其外缘的沉积物做过一些调查研究，但比例尺都比较小，不能突出反映本区的沉积特征。