Remote sensing of zooplankton and other large marine particles

海洋的光学性质传统上被描述为由水、浮游植物、沉积物和有色的溶解有机物质决定。最近有研究表明，在挪威西北海岸附近形成的密集浮游动物群体(Calanus Finmarchicus)数量充足，颜色丰富，可以在海洋颜色图像中识别它们的存在(Basedow等人，《科学报告》，2019年)。该项目的目的是更好地了解海洋中发现的浮游动物和其他大的有色颗粒的光学性质，了解它们对海洋颜色信号的影响，并查明大颗粒对水的颜色有重大贡献的群体和其他高浓度事件的发生。这项工作将有助于开发一系列潜在的新应用，包括监测Calanus和磷虾表面种群丰度的新工具，这两种水虾都受到商业收获作业的影响。这项工作将涉及使用最先进的设备进行实际光学测量的混合，包括测量大颗粒吸收特性的点源积分腔吸收计(PSICAM)，以及处理和分析海洋颜色遥感数据以识别和可能量化高浓度事件。

The optical properties of the ocean are traditionally described as being determined by water, phytoplankton, sediments and coloured dissolved organic material. Recently it has been shown that dense swarms of zooplankton (Calanus finmarchicus) forming off the northwest coast of Norway, are sufficiently abundant and coloured that their presence can be identified in ocean colour imagery (Basedow et al., Scientific Reports, 2019). The aim of this project is to better understand the optical properties of zooplankton and other large, coloured particles found in the ocean, to understand their impact on ocean colour signals and to identify the occurrence of swarms and other high concentration events where large particles make a significant contribution to the colour of the water. This work will contribute to the development of a range of potential new applications, including new tools for monitoring the abundance of surface swarms of Calanus and krill, both of which are subject to commercial harvesting operations. The work will involve a mixture of practical optical measurements using state of the art equipment including a Point Source Integrating Cavity Absorption Meter (PSICAM) to measure absorption properties of large particles, and processing and analysis of ocean colour remote sensing data to identify and potentially quantify high concentration events.