1997年8月台湾浅滩南部边缘海域主要光学要素的多周日变化分析

ANALYSIS ON THE MULTI-DAYS CHANGE OF OPTICAL PARAMETERS IN THE SOUTHERN MARGINAL AREA OF THE TAIWAN SHOALS IN AUGUST 1997

通过对1997年8月中旬在台湾浅滩南部边缘海域所获得的光学参数数据进行分析 ,对水下辐照度、光束衰减率和光束透射率等主要光学参数的多周日变化规律及其形成机制进行了探讨。认为调查期间 ,台湾浅滩南部的水下辐照度自上而下表现出了很好的规律性和一致性 ,各层的辐照度随时间呈峰谷型分布 ,与太阳辐射强度规律符合得较好 ;不同时刻的光束衰减率的垂直分布基本相似 ,往往在30m层上下出现一个峰值。

Through analysis on the optical parameter data obtained in the southern marginal area of the Taiwan Shoals in the middle August 1997, we get the multi days change rules of some main optical parameters such as underwater irradiance, optical attenuation and transmission, and deduce the forming mechanism. During the investigation period, the variation of underwater irradiance in this area is regular and consistent from upper layer to lower layer, with peak valley alternatively distributional feature, which accords with the irradiation of the sun. The vertical distribution of attenuation is similar, usually having a peak value at about 30 m layer.