利用ECMWF ERA-40再分析波浪数据,来计算波龄,无因次波高以及无因次周期。采用Toba3/2指数率的方式来研究无因次波高与无因次周期的关系。通过研究得出了无因次波高与无因次周期的变化规律,比较大洋东岸与西岸发现,大洋东岸无因次波高与无因次周期分布较集中;大洋东西岸无因次波高与无因次周期的关系比较接近。 Wave data were reanalysed using ECMWF ERA-40 to calculate wave age, dimensionless wave height, and dimensionless period. Toba3 / 2 exponential rate method is used to study the relationship between dimensionless wave height and dimensionless period. Through the research, we can get the law of non-dimensional wave height and non-dimensional cycle. Compared with the east and west coast of the ocean, the non-dimensional wave height and non-dimensional period distribution of the east coast of the ocean are more concentrated. Non-dimensional cycle of the relationship is relatively close.