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Citation: ZHENG Guizhen, JIANG Xiulan and HAN Shuzong, . The difference between the joint probability distributions of apparent wave heights and periods and individual wave heights and periods. ACTA OCEANOLOGICA SINICA, 2004, (3): 399-406.

2004, (3): 399-406.

The difference between the joint probability distributions of apparent wave heights and periods and individual wave heights and periods

1.  Laboratory of Physical Oceanography, China Ocean University, Qingdao 266003, China,Qingdao Institute of Architecture and Engineering, Qingdao 266031, China and Laboratory of Physical Oceanography, China Ocean University, Qingdao 266003, China

Received Date: 2004-03-03
Accepted Date: 2004-05-20

The joint distribution of wave heights and periods of individual waves is usually approximated by the joint distribution of apparent wave heights and periods.However there is difference between them.This difference is addressed and the theoretical joint distributions of apparent wave heights and periods due to Longuet-Higgins and Sun are modified to give more reasonable representations of the joint distribution of wave heights and periods of individual waves.The modification has overcome an inherent drawback of these joint PDFs that the mean wave period is infinite.A comparison is made between the modified formulae and the field data of Goda,which shows that the new formulae consist with the measurement better than their original counterparts.

Key words: sea waves , wave statistics , wave height , wave period

The joint distribution of wave heights and periods of individual waves is usually approximated by the joint distribution of apparent wave heights and periods.However there is difference between them.This difference is addressed and the theoretical joint distributions of apparent wave heights and periods due to Longuet-Higgins and Sun are modified to give more reasonable representations of the joint distribution of wave heights and periods of individual waves.The modification has overcome an inherent drawback of these joint PDFs that the mean wave period is infinite.A comparison is made between the modified formulae and the field data of Goda,which shows that the new formulae consist with the measurement better than their original counterparts.

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The difference between the joint probability distributions of apparent wave heights and periods and individual wave heights and periods

ZHENG Guizhen, JIANG Xiulan and HAN Shuzong,