多海洋参数赤潮MODIS综合监测

Red Tide MODIS Monitoring Based on Multi-oceanic Parameters

针对由单一海洋参数对赤潮灾害提取的不足,提出一种多海洋参数赤潮遥感监测技术.该方法利用MODIS影像数据反演出海洋表面温度和叶绿素a浓度,结合悬浮泥沙浓度和海水异常等多海洋参数,设计赤潮灾害提取判别规则.该判别规则能充分利用海洋参数在赤潮灾害提取中的优势,克服单一参数在赤潮灾害识别上的遗漏和误判.以2004年5月30日和2004年6月11日渤海海域的MODIS影像为实验数据进行实例研究,证实了基于多海洋参数的赤潮遥感监测技术的可行性和有效性.

Taking into account the drawbacks in the red tide extraction from single oceanic parameter, this paper presents a new red tide monitoring technique using multiple oceanic parameters. The method focuses on the sea surface temperature and chlorophyll-a concentration retrieved from MODIS imagery. In combination with suspended sediment concentration and sea water abnormlities, we have designed the discrimination rules, which take full advantages of each oceanic parameter to extract red tides, and avoid missing and erroneous information obtained based on a single parameter. MODIS imageries acquired on May 30 and June 11, 2004, covering the Bohai Sea, are taken as an example to show validity and feasibility of the proposed method.