一个可用于实时计算的太阳辐射模型

A REAL-TIME IRRADIATION MODEL

拓展了Smith等(1984)关于海面辐照度的数值算法,给出了一个可实时计算海面和海水中太阳辐射强度的模型,通过计算1998年9月24日—10月7日以及1999年4月28日—5月11日渤海表面太阳辐射量(两个时间段内的辐照总量误差分别为0.27%和6.67%),显示出该模型与实测结果良好的适应性。另外,模型还揭示在不考虑其它限制因素的前提下,当浮游植物生物量处于较小的状态时,海水中的太阳辐射能促进浮游植物的快速生长,但是当浮游植物的生物量增大到一定程度时,由于对太阳辐射的遮蔽作用增强,浮游植物的生长明显受到抑制。

The authors modified the numerical method of Smith et al（1984） to calculate the irradiation on the sea surface and in the interior of seawaters, and presented a real-time irradiation model. Application of this model in the Bohai Sea surface from September 24 to October 7, 1998 and from April 28 to May 11 1999 showed a good agreement to the observation data; the bias between calculated and measured irradiation energies are 0.27% and 6.67% for the two periods, respectively. When the phytoplankton biomass is small, light irritation could promote algae growth quickly if other influencing factor are ignored; however, the increase in the phytoplankton biomass would shield the light from entering deep water, resulting in light attenuation and algae growth holdback.