浮游植物分布对强台风尼格的响应  

Effect of Typhoon NALGAE on the Distribution of Phytoplankton

作　　者：杨超宇[1] 

机构地区：[1]国家海洋局南海预报中心,广东广州510301

出　　处：《激光与光电子学进展》2014年第10期38-43,共6页Laser & Optoelectronics Progress

基　　金：国家海洋局南海分局海洋科学技术局长基金(1338)

摘　　要：研究调查了Ekman流对浮游植物生态动力过程的驱动机制。采用新的光学遥感算法提取浮游植物光学有效信息。该算法结合了近红外波段的浮游植物荧光信号以及可见光部分的弹性散射的辐射传输模型,通过两次迭代优化算法,提取浮游植物光学信号。采用辐射传输软件Hydrolight对海水水下光场进行了数值模拟,并结合新算法对模拟数据进行了对比分析。结果表明,新算法较好地表征了浮游植物叶绿素光学参数。利用MERIS光学遥感数据并结合了动力学参数,利用该算法分析了强台风尼格对我国海域浮游植物分布的影响。研究结果表明,Ekman流是我国海域浮游植物分布异常的原因之一。Optical property of phytoplankton is studied based on the physical and biological properties in China Sea. A new algorithm, combined with global system for mobile communication model and fluorescence model, is applied to retrieve the phytoplankton information. In the algorithm, twice optimization procedure is performed to get the best results. This combined algorithm is applied to simulate the underwater light field by using Hydrolight. The comparison of the sinulation results and synthetic data shows that the algorithm is effective to retrieve the optical information of phytoplankton. In addition, by using optical satellite data （MERIS） and the dynamic parameters, the impact of NALGAE on phytoplankton distribution is analyzed. The result shows Ekman pumping is one of reasons for the ocean color anomalies.

关 键 词：遥感 光学遥感 荧光算法 全球移动通信系统 尼格 

分 类 号：P733.31[天文地球—物理海洋学]