海洋光合有效辐射分布的计算模式

A BIO-OPTICAL MODEL FOR OCEAN PHOTOSYNTHETIC AVAILABLE RADIATION

针对一类海水,采用美国标准大气模型和一类水体海洋生物 光学特性的半分析方法,建立了海洋光合有效辐射计算模式。模式比较全面地考虑了大气、海 气界面和水体的光辐射传输过程,能较好地用于分析叶绿素浓度以及光辐射场的角分布对光合有效辐射分布的影响。对模拟结果的分析以及与实测结果的比较表明,该模式能较好地应用于计算光衰减系数、光谱辐照度随深度的分布、光合有效辐射随深度的分布和真光层深度,在海洋生态系统的光动力学研究和水色遥感方面有较好的应用前景。

On the basis of a standard atmospheric model and the semianalytical method of biooptical properties of case 1 waters,a numerical model of photosynthetic available radiation has been established. It involves all transmission processes of light radiation in atmosphere,airsea interface and water column, and can be used to analyze the effects of chlorophyll concentration and light angular distribution on the determination of photosynthetic available radiation. Through analyzing the model results and comparing them to the measured data in situ, it is shown that this numerical model can be used to estimate and calculate light attenuation coefficient, depthwavelength dependence of underwater irradiance, depth wavelength dependence of photosynthetic available radiation and depth of euphotic layer. The model has a good prospect in the studies of ocean color remote sensing and light dynamics of ocean ecosystem