基于二维激光观测的溢油及其乳化过程散射模式研究进展

发布时间：2018-02-12 22:26

本文关键词： 微波后向散射激光扫描仪海面溢油溢油海面粗糙度乳化　出处：《海洋科学》2016年02期 　论文类型：期刊论文

【摘要】：合成孔径雷达(SAR)以其高分辨率、能不受雨云影响实施全天时全天候全方位监测,在海面溢油灾害应急监测过程中发挥着越来越重要的作用。溢油是因为海面油膜抑制了毛细波和重力波,在SAR图像上呈暗斑而被识别。然而,海面溢油的乳化过程直接影响SAR对海面溢油后向散射截面的观测精度。本研究以物理海洋学和激光原理以及海面电磁散射理论为基础,通过实验利用激光扫描仪观测海面溢油粗糙度,分别与溢油特征参数、后向散射系数建立对应关系;耦合海面溢油参数与后向散射截面的关系,利用电磁散射数值建模方法,建立海面溢油散射模型,研究海面溢油乳化过程对微波后向散射截面的影响。本项目的研究将为SAR监测海面溢油量、溢油厚度及油品分布格局提供了可能;将进一步揭示海面溢油的散射机制,提高SAR海面监测溢油的精度和能力。
[Abstract]:With its high resolution, synthetic Aperture Radar (SAR) is capable of all-weather and all-weather monitoring without the influence of rain clouds. Oil spill plays a more and more important role in the emergency monitoring of sea surface oil spill. The oil spill is recognized because the oil film suppresses the capillary and gravity waves and appears dark spots on the SAR image. However, The emulsification process of sea surface oil spill directly affects the observation accuracy of SAR backscattering cross section of oil spill. This study is based on physical oceanography, laser theory and electromagnetic scattering theory of sea surface. By using laser scanner to observe the surface roughness of oil spill, the corresponding relationship is established with the characteristic parameters of oil spill and the backscattering coefficient, and the numerical modeling method of electromagnetic scattering is used to combine the relationship between the oil spill parameters and the backscattering cross section. A sea surface oil spill scattering model was established to study the effect of oil emulsification on the cross section of microwave backscattering. This study will provide a possibility for SAR to monitor oil spill, oil thickness and oil product distribution pattern. It will further reveal the scattering mechanism of oil spill on the sea surface and improve the accuracy and capability of oil spill monitoring by SAR.
【作者单位】：山东省海岸带环境过程重点实验室中国科学院烟台海岸带研究所;国家海洋局第一海洋研究所;南京信息工程大学海洋技术学院;
【基金】：国家自然科学基金面上项目(41576032;41176160)~~
【分类号】：X55;X87

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